├── Demo-PlanStep-1 ├── Demo-PlanStep-1.xcodeproj │ ├── project.xcworkspace │ │ ├── contents.xcworkspacedata │ │ └── xcuserdata │ │ │ └── Unique.xcuserdatad │ │ │ └── UserInterfaceState.xcuserstate │ ├── xcuserdata │ │ └── Unique.xcuserdatad │ │ │ ├── xcdebugger │ │ │ └── Breakpoints_v2.xcbkptlist │ │ │ └── xcschemes │ │ │ ├── xcschememanagement.plist │ │ │ └── Demo-PlanStep-1.xcscheme │ └── project.pbxproj └── Demo-PlanStep-1 │ ├── MUHostClass.m │ ├── MUHostClass.h │ ├── MUValueClass.h │ ├── MUHostClass+Association.h │ ├── main.m │ ├── MUHostClass+Association.m │ └── MUValueClass.m ├── Demo-PlanStep-2 ├── Demo-PlanStep-2.xcodeproj │ ├── project.xcworkspace │ │ ├── contents.xcworkspacedata │ │ └── xcuserdata │ │ │ └── Unique.xcuserdatad │ │ │ └── UserInterfaceState.xcuserstate │ ├── xcuserdata │ │ └── Unique.xcuserdatad │ │ │ └── xcschemes │ │ │ ├── xcschememanagement.plist │ │ │ └── Demo-PlanStep-2.xcscheme │ └── project.pbxproj └── Demo-PlanStep-2 │ ├── MUHostClass.m │ ├── MUValueClass.m │ ├── MUHostClass.h │ ├── MUValueClass.h │ ├── MUHostClass+Association.h │ ├── NSObject+MUWeakTask.h │ ├── MUWeakTask.h │ ├── main.m │ ├── NSObject+MUWeakTask.m │ ├── MUWeakTask.m │ └── MUHostClass+Association.m ├── Demo-PlanStep-Release ├── Demo-PlanStep-Release.xcodeproj │ ├── project.xcworkspace │ │ ├── contents.xcworkspacedata │ │ └── xcuserdata │ │ │ └── Unique.xcuserdatad │ │ │ └── UserInterfaceState.xcuserstate │ ├── xcuserdata │ │ └── Unique.xcuserdatad │ │ │ ├── xcdebugger │ │ │ └── Breakpoints_v2.xcbkptlist │ │ │ └── xcschemes │ │ │ ├── xcschememanagement.plist │ │ │ └── Demo-PlanStep-Release.xcscheme │ └── project.pbxproj └── Demo-PlanStep-Release │ ├── NSObject+SubObj.h │ ├── NSObject+SubObj.m │ └── main.m ├── Assosiation ├── MUAssosiation.h ├── MUDeallocTask.h ├── NSObject+Dealloc.h ├── NSObject+Association.h ├── NSObject+Dealloc.m ├── NSObject+Association.m └── MUDeallocTask.m └── README.md /Demo-PlanStep-1/Demo-PlanStep-1.xcodeproj/project.xcworkspace/contents.xcworkspacedata: -------------------------------------------------------------------------------- 1 | 2 | 4 | 6 | 7 | 8 | -------------------------------------------------------------------------------- /Demo-PlanStep-2/Demo-PlanStep-2.xcodeproj/project.xcworkspace/contents.xcworkspacedata: -------------------------------------------------------------------------------- 1 | 2 | 4 | 6 | 7 | 8 | -------------------------------------------------------------------------------- /Demo-PlanStep-Release/Demo-PlanStep-Release.xcodeproj/project.xcworkspace/contents.xcworkspacedata: -------------------------------------------------------------------------------- 1 | 2 | 4 | 6 | 7 | 8 | -------------------------------------------------------------------------------- /Demo-PlanStep-1/Demo-PlanStep-1/MUHostClass.m: -------------------------------------------------------------------------------- 1 | // 2 | // MUHostClass.m 3 | // Demo-PlanStep-1 4 | // 5 | // Created by 吴双 on 16/8/13. 6 | // Copyright © 2016年 unique. All rights reserved. 7 | // 8 | 9 | #import "MUHostClass.h" 10 | 11 | @implementation MUHostClass 12 | 13 | @end 14 | -------------------------------------------------------------------------------- /Demo-PlanStep-2/Demo-PlanStep-2/MUHostClass.m: -------------------------------------------------------------------------------- 1 | // 2 | // MUHostClass.m 3 | // Demo-PlanStep-2 4 | // 5 | // Created by 吴双 on 16/8/13. 6 | // Copyright © 2016年 unique. All rights reserved. 7 | // 8 | 9 | #import "MUHostClass.h" 10 | 11 | @implementation MUHostClass 12 | 13 | @end 14 | -------------------------------------------------------------------------------- /Demo-PlanStep-2/Demo-PlanStep-2/MUValueClass.m: -------------------------------------------------------------------------------- 1 | // 2 | // MUValueClass.m 3 | // Demo-PlanStep-2 4 | // 5 | // Created by 吴双 on 16/8/13. 6 | // Copyright © 2016年 unique. All rights reserved. 7 | // 8 | 9 | #import "MUValueClass.h" 10 | 11 | @implementation MUValueClass 12 | 13 | @end 14 | -------------------------------------------------------------------------------- /Demo-PlanStep-1/Demo-PlanStep-1.xcodeproj/project.xcworkspace/xcuserdata/Unique.xcuserdatad/UserInterfaceState.xcuserstate: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/Magic-Unique/Weak-Category-by-Runtime/HEAD/Demo-PlanStep-1/Demo-PlanStep-1.xcodeproj/project.xcworkspace/xcuserdata/Unique.xcuserdatad/UserInterfaceState.xcuserstate -------------------------------------------------------------------------------- /Demo-PlanStep-2/Demo-PlanStep-2.xcodeproj/project.xcworkspace/xcuserdata/Unique.xcuserdatad/UserInterfaceState.xcuserstate: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/Magic-Unique/Weak-Category-by-Runtime/HEAD/Demo-PlanStep-2/Demo-PlanStep-2.xcodeproj/project.xcworkspace/xcuserdata/Unique.xcuserdatad/UserInterfaceState.xcuserstate -------------------------------------------------------------------------------- /Demo-PlanStep-2/Demo-PlanStep-2/MUHostClass.h: -------------------------------------------------------------------------------- 1 | // 2 | // MUHostClass.h 3 | // Demo-PlanStep-2 4 | // 5 | // Created by 吴双 on 16/8/13. 6 | // Copyright © 2016年 unique. All rights reserved. 7 | // 8 | 9 | #import 10 | 11 | @interface MUHostClass : NSObject 12 | 13 | @end 14 | -------------------------------------------------------------------------------- /Demo-PlanStep-2/Demo-PlanStep-2/MUValueClass.h: -------------------------------------------------------------------------------- 1 | // 2 | // MUValueClass.h 3 | // Demo-PlanStep-2 4 | // 5 | // Created by 吴双 on 16/8/13. 6 | // Copyright © 2016年 unique. All rights reserved. 7 | // 8 | 9 | #import 10 | 11 | @interface MUValueClass : NSObject 12 | 13 | @end 14 | -------------------------------------------------------------------------------- /Demo-PlanStep-Release/Demo-PlanStep-Release.xcodeproj/project.xcworkspace/xcuserdata/Unique.xcuserdatad/UserInterfaceState.xcuserstate: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/Magic-Unique/Weak-Category-by-Runtime/HEAD/Demo-PlanStep-Release/Demo-PlanStep-Release.xcodeproj/project.xcworkspace/xcuserdata/Unique.xcuserdatad/UserInterfaceState.xcuserstate -------------------------------------------------------------------------------- /Assosiation/MUAssosiation.h: -------------------------------------------------------------------------------- 1 | // 2 | // MUAssosiation.h 3 | // Demo-PlanStep-Release 4 | // 5 | // Created by 吴双 on 16/8/14. 6 | // Copyright © 2016年 unique. All rights reserved. 7 | // 8 | 9 | #ifndef MUAssosiation_h 10 | #define MUAssosiation_h 11 | 12 | #import "NSObject+Association.h" 13 | 14 | 15 | #endif /* MUAssosiation_h */ 16 | -------------------------------------------------------------------------------- /Demo-PlanStep-1/Demo-PlanStep-1/MUHostClass.h: -------------------------------------------------------------------------------- 1 | // 2 | // MUHostClass.h 3 | // Demo-PlanStep-1 4 | // 5 | // Created by 吴双 on 16/8/13. 6 | // Copyright © 2016年 unique. All rights reserved. 7 | // 8 | 9 | #import 10 | 11 | // 这是“宿主对象”类的主要实现，.m 文件可以无视 12 | 13 | @interface MUHostClass : NSObject 14 | 15 | @end 16 | -------------------------------------------------------------------------------- /Demo-PlanStep-1/Demo-PlanStep-1/MUValueClass.h: -------------------------------------------------------------------------------- 1 | // 2 | // MUValueClass.h 3 | // Demo-PlanStep-1 4 | // 5 | // Created by 吴双 on 16/8/13. 6 | // Copyright © 2016年 unique. All rights reserved. 7 | // 8 | 9 | // 这是值对象的实现 10 | 11 | #import 12 | 13 | @interface MUValueClass : NSObject 14 | 15 | - (void)setWeakReference:(id)hostObj forWipeSEL:(SEL)wipeSEL; 16 | 17 | @end 18 | -------------------------------------------------------------------------------- /Demo-PlanStep-1/Demo-PlanStep-1/MUHostClass+Association.h: -------------------------------------------------------------------------------- 1 | // 2 | // MUHostClass+Association.h 3 | // Demo-PlanStep-1 4 | // 5 | // Created by 吴双 on 16/8/13. 6 | // Copyright © 2016年 unique. All rights reserved. 7 | // 8 | 9 | #import "MUHostClass.h" 10 | #import "MUValueClass.h" 11 | 12 | @interface MUHostClass (Association) 13 | 14 | @property (nonatomic, weak) MUValueClass *valueObject; 15 | 16 | @end 17 | -------------------------------------------------------------------------------- /Demo-PlanStep-2/Demo-PlanStep-2/MUHostClass+Association.h: -------------------------------------------------------------------------------- 1 | // 2 | // MUHostClass+Association.h 3 | // Demo-PlanStep-2 4 | // 5 | // Created by 吴双 on 16/8/13. 6 | // Copyright © 2016年 unique. All rights reserved. 7 | // 8 | 9 | #import "MUHostClass.h" 10 | #import "MUValueClass.h" 11 | 12 | @interface MUHostClass (Association) 13 | 14 | @property (nonatomic, weak) MUValueClass *valueObject; 15 | 16 | @end 17 | -------------------------------------------------------------------------------- /Demo-PlanStep-2/Demo-PlanStep-2/NSObject+MUWeakTask.h: -------------------------------------------------------------------------------- 1 | // 2 | // NSObject+MUWeakTask.h 3 | // Demo-PlanStep-2 4 | // 5 | // Created by 吴双 on 16/8/13. 6 | // Copyright © 2016年 unique. All rights reserved. 7 | // 8 | 9 | #import 10 | 11 | typedef void(^TaskBlock)(void); 12 | 13 | @interface NSObject (MUWeakTask) 14 | 15 | - (void)setWeakReferenceTask:(TaskBlock)task; 16 | 17 | @end 18 | -------------------------------------------------------------------------------- /Demo-PlanStep-Release/Demo-PlanStep-Release/NSObject+SubObj.h: -------------------------------------------------------------------------------- 1 | // 2 | // NSObject+SubObj.h 3 | // Demo-PlanStep-Release 4 | // 5 | // Created by 吴双 on 16/8/14. 6 | // Copyright © 2016年 unique. All rights reserved. 7 | // 8 | 9 | #import 10 | 11 | @interface NSObject (SubObj) 12 | 13 | @property (nonatomic, weak) NSObject *subObj; 14 | 15 | @property (nonatomic, weak) NSObject *superObj; 16 | 17 | @end 18 | -------------------------------------------------------------------------------- /Assosiation/MUDeallocTask.h: -------------------------------------------------------------------------------- 1 | // 2 | // MUDeallocTask.h 3 | // RuntimeWeak 4 | // 5 | // Created by unique on 16/8/11. 6 | // Copyright © 2016年 unique. All rights reserved. 7 | // 8 | 9 | #import 10 | 11 | typedef void(^DeallocBlock)(void); 12 | 13 | @interface MUDeallocTask : NSObject 14 | 15 | - (void)addTask:(DeallocBlock)task forTarget:(id)target key:(NSString *)key; 16 | 17 | - (void)removeTaskForTarget:(id)target key:(NSString *)key; 18 | 19 | @end 20 | -------------------------------------------------------------------------------- /Assosiation/NSObject+Dealloc.h: -------------------------------------------------------------------------------- 1 | // 2 | // NSObject+Dealloc.h 3 | // RuntimeWeak 4 | // 5 | // Created by unique on 16/8/11. 6 | // Copyright © 2016年 unique. All rights reserved. 7 | // 8 | 9 | #import 10 | 11 | typedef void(^DeallocBlock)(void); 12 | 13 | @interface NSObject (Dealloc) 14 | 15 | - (void)addDeallocTask:(DeallocBlock)task forTarget:(id)target key:(NSString *)key; 16 | 17 | - (void)removeDeallocTaskForTarget:(id)target key:(NSString *)key; 18 | 19 | @end 20 | -------------------------------------------------------------------------------- /Demo-PlanStep-2/Demo-PlanStep-2/MUWeakTask.h: -------------------------------------------------------------------------------- 1 | // 2 | // MUWeakTask.h 3 | // Demo-PlanStep-2 4 | // 5 | // Created by 吴双 on 16/8/13. 6 | // Copyright © 2016年 unique. All rights reserved. 7 | // 8 | 9 | #import 10 | 11 | typedef void(^TaskBlock)(void); 12 | 13 | @interface MUWeakTask : NSObject 14 | 15 | @property (nonatomic, readonly) TaskBlock taskBlock; 16 | 17 | - (instancetype)initWithTaskBlock:(TaskBlock)taskBlock; 18 | + (instancetype)taskWithTaskBlock:(TaskBlock)taskBlock; 19 | 20 | 21 | @end 22 | -------------------------------------------------------------------------------- /Demo-PlanStep-2/Demo-PlanStep-2/main.m: -------------------------------------------------------------------------------- 1 | // 2 | // main.m 3 | // Demo-PlanStep-2 4 | // 5 | // Created by 吴双 on 16/8/13. 6 | // Copyright © 2016年 unique. All rights reserved. 7 | // 8 | 9 | #import 10 | #import "MUHostClass+Association.h" 11 | 12 | int main(int argc, const char * argv[]) { 13 | @autoreleasepool { 14 | MUHostClass *hostObj = [MUHostClass new]; 15 | @autoreleasepool { 16 | MUValueClass *valueObj = [MUValueClass new]; 17 | hostObj.valueObject = valueObj; 18 | NSLog(@"%@", hostObj.valueObject); 19 | } 20 | NSLog(@"%@", hostObj.valueObject); 21 | } 22 | return 0; 23 | } 24 | -------------------------------------------------------------------------------- /Demo-PlanStep-1/Demo-PlanStep-1/main.m: -------------------------------------------------------------------------------- 1 | // 2 | // main.m 3 | // Demo-PlanStep-1 4 | // 5 | // Created by 吴双 on 16/8/13. 6 | // Copyright © 2016年 unique. All rights reserved. 7 | // 8 | 9 | #import 10 | #import "MUHostClass+Association.h" 11 | 12 | 13 | int main(int argc, const char * argv[]) { 14 | @autoreleasepool { 15 | MUHostClass *hostObj = [MUHostClass new]; 16 | @autoreleasepool { 17 | MUValueClass *valueObj = [MUValueClass new]; 18 | hostObj.valueObject = valueObj; 19 | NSLog(@"%@", hostObj.valueObject); 20 | } 21 | NSLog(@"%@", hostObj.valueObject); 22 | } 23 | return 0; 24 | } 25 | -------------------------------------------------------------------------------- /Demo-PlanStep-2/Demo-PlanStep-2/NSObject+MUWeakTask.m: -------------------------------------------------------------------------------- 1 | // 2 | // NSObject+MUWeakTask.m 3 | // Demo-PlanStep-2 4 | // 5 | // Created by 吴双 on 16/8/13. 6 | // Copyright © 2016年 unique. All rights reserved. 7 | // 8 | 9 | #import "NSObject+MUWeakTask.h" 10 | #import "MUWeakTask.h" 11 | #import 12 | 13 | @implementation NSObject (MUWeakTask) 14 | 15 | static const char kWeakTask = '0'; 16 | 17 | - (void)setWeakReferenceTask:(TaskBlock)task { 18 | MUWeakTask *weakTask = [MUWeakTask taskWithTaskBlock:task]; 19 | objc_setAssociatedObject(self, &kWeakTask, weakTask, OBJC_ASSOCIATION_RETAIN_NONATOMIC); 20 | } 21 | 22 | @end 23 | -------------------------------------------------------------------------------- /Demo-PlanStep-1/Demo-PlanStep-1.xcodeproj/xcuserdata/Unique.xcuserdatad/xcdebugger/Breakpoints_v2.xcbkptlist: -------------------------------------------------------------------------------- 1 | 2 | 5 | 6 | 8 | 14 | 15 | 16 | 17 | 18 | -------------------------------------------------------------------------------- /Demo-PlanStep-Release/Demo-PlanStep-Release.xcodeproj/xcuserdata/Unique.xcuserdatad/xcdebugger/Breakpoints_v2.xcbkptlist: -------------------------------------------------------------------------------- 1 | 2 | 5 | 6 | 8 | 14 | 15 | 16 | 17 | 18 | -------------------------------------------------------------------------------- /Demo-PlanStep-1/Demo-PlanStep-1.xcodeproj/xcuserdata/Unique.xcuserdatad/xcschemes/xcschememanagement.plist: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | SchemeUserState 6 | 7 | Demo-PlanStep-1.xcscheme 8 | 9 | orderHint 10 | 0 11 | 12 | 13 | SuppressBuildableAutocreation 14 | 15 | D4A9E0431D5EA95C0032DF17 16 | 17 | primary 18 | 19 | 20 | 21 | 22 | 23 | -------------------------------------------------------------------------------- /Demo-PlanStep-2/Demo-PlanStep-2.xcodeproj/xcuserdata/Unique.xcuserdatad/xcschemes/xcschememanagement.plist: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | SchemeUserState 6 | 7 | Demo-PlanStep-2.xcscheme 8 | 9 | orderHint 10 | 0 11 | 12 | 13 | SuppressBuildableAutocreation 14 | 15 | D4A9E06E1D5EB0B40032DF17 16 | 17 | primary 18 | 19 | 20 | 21 | 22 | 23 | -------------------------------------------------------------------------------- /Demo-PlanStep-2/Demo-PlanStep-2/MUWeakTask.m: -------------------------------------------------------------------------------- 1 | // 2 | // MUWeakTask.m 3 | // Demo-PlanStep-2 4 | // 5 | // Created by 吴双 on 16/8/13. 6 | // Copyright © 2016年 unique. All rights reserved. 7 | // 8 | 9 | #import "MUWeakTask.h" 10 | 11 | @implementation MUWeakTask 12 | 13 | - (instancetype)initWithTaskBlock:(TaskBlock)taskBlock { 14 | self = [super init]; 15 | if (self) { 16 | _taskBlock = [taskBlock copy]; 17 | } 18 | return self; 19 | } 20 | 21 | + (instancetype)taskWithTaskBlock:(TaskBlock)taskBlock { 22 | return [[self alloc] initWithTaskBlock:taskBlock]; 23 | } 24 | 25 | - (void)dealloc { 26 | if (self.taskBlock) { 27 | self.taskBlock(); 28 | } 29 | } 30 | 31 | @end 32 | -------------------------------------------------------------------------------- /Demo-PlanStep-Release/Demo-PlanStep-Release.xcodeproj/xcuserdata/Unique.xcuserdatad/xcschemes/xcschememanagement.plist: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | SchemeUserState 6 | 7 | Demo-PlanStep-Release.xcscheme 8 | 9 | orderHint 10 | 0 11 | 12 | 13 | SuppressBuildableAutocreation 14 | 15 | D4E07A841D60B418006E2F90 16 | 17 | primary 18 | 19 | 20 | 21 | 22 | 23 | -------------------------------------------------------------------------------- /Assosiation/NSObject+Association.h: -------------------------------------------------------------------------------- 1 | // 2 | // NSObject+Association.h 3 | // RuntimeWeak 4 | // 5 | // Created by unique on 16/8/11. 6 | // Copyright © 2016年 unique. All rights reserved. 7 | // 8 | 9 | #import 10 | 11 | typedef NS_ENUM(NSUInteger, NSAssociation) { 12 | NSAssociationAssign,// = 0x0001, 13 | NSAssociationRetain,// = 0x0010, 14 | NSAssociationCopy,// = 0x0100, 15 | NSAssociationWeak,// = 0x1000, 16 | }; 17 | 18 | @interface NSObject (Association) 19 | 20 | - (void)setAssociatedObject:(id)object forKey:(NSString *)key association:(NSAssociation)association isAtomic:(BOOL)isAtomic; 21 | 22 | - (id)associatedObjectForKey:(NSString *)key; 23 | 24 | @end 25 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # Weak-Category-by-Runtime 2 | 3 | A tool to create weakly property in category. **[explain](http://www.jianshu.com/p/ed65d71554d8)** 4 | 5 | 一个在分类中创建弱引用属性的工具，**[原文链接](http://www.jianshu.com/p/ed65d71554d8)**。 6 | 7 | ## USAGE 使用 8 | 9 | ```objective-c 10 | // in a category... 11 | 12 | #import "MUAssociation.h" 13 | 14 | // @property (nonatomic, weak) id someProperty; // write in .h file 15 | 16 | @implementation SomeClass (SomeCategory) 17 | 18 | - (void)setSomeProperty:(id)someProperty { 19 | [self setAssociatedObject:someProperty forKey:@"someProperty" association:NSAssociationWeak isAtomic:NO]; 20 | } 21 | 22 | - (id)someProperty { 23 | return [self associatedObjectForKey:@"someProperty"]; 24 | } 25 | 26 | @end 27 | ``` 28 | 29 | -------------------------------------------------------------------------------- /Demo-PlanStep-1/Demo-PlanStep-1/MUHostClass+Association.m: -------------------------------------------------------------------------------- 1 | // 2 | // MUHostClass+Association.m 3 | // Demo-PlanStep-1 4 | // 5 | // Created by 吴双 on 16/8/13. 6 | // Copyright © 2016年 unique. All rights reserved. 7 | // 8 | 9 | #import "MUHostClass+Association.h" 10 | #import 11 | 12 | @implementation MUHostClass (Association) 13 | 14 | const static char kValueObject = '0'; 15 | 16 | - (void)setValueObject:(MUValueClass *)valueObject { 17 | objc_setAssociatedObject(self, &kValueObject, valueObject, OBJC_ASSOCIATION_ASSIGN); 18 | [valueObject setWeakReference:self forWipeSEL:@selector(setValueObject:)]; 19 | } 20 | 21 | - (MUValueClass *)valueObject { 22 | return objc_getAssociatedObject(self, &kValueObject); 23 | } 24 | 25 | @end 26 | -------------------------------------------------------------------------------- /Demo-PlanStep-1/Demo-PlanStep-1/MUValueClass.m: -------------------------------------------------------------------------------- 1 | // 2 | // MUValueClass.m 3 | // Demo-PlanStep-1 4 | // 5 | // Created by 吴双 on 16/8/13. 6 | // Copyright © 2016年 unique. All rights reserved. 7 | // 8 | 9 | #import "MUValueClass.h" 10 | 11 | @interface MUValueClass () 12 | { 13 | __weak id _hostObj; 14 | SEL _hostWipeSEL; 15 | } 16 | 17 | @end 18 | 19 | @implementation MUValueClass 20 | 21 | - (void)setWeakReference:(id)hostObj forWipeSEL:(SEL)wipeSEL { 22 | _hostObj = hostObj; 23 | _hostWipeSEL = wipeSEL; 24 | } 25 | 26 | - (void)dealloc { 27 | // 此处用宏取消 ARC 的警告 28 | #pragma clang diagnostic push // 创建取消警告域 29 | #pragma clang diagnostic ignored "-Warc-performSelector-leaks" 30 | [_hostObj performSelector:_hostWipeSEL withObject:nil]; 31 | #pragma clang diagnostic pop // 关闭取消警告域 32 | } 33 | 34 | @end 35 | -------------------------------------------------------------------------------- /Demo-PlanStep-Release/Demo-PlanStep-Release/NSObject+SubObj.m: -------------------------------------------------------------------------------- 1 | // 2 | // NSObject+SubObj.m 3 | // Demo-PlanStep-Release 4 | // 5 | // Created by 吴双 on 16/8/14. 6 | // Copyright © 2016年 unique. All rights reserved. 7 | // 8 | 9 | #import "NSObject+SubObj.h" 10 | #import "MUAssosiation.h" 11 | 12 | @implementation NSObject (SubObj) 13 | 14 | - (void)setSubObj:(NSObject *)subObj { 15 | [self setAssociatedObject:subObj forKey:@"subObj" association:NSAssociationWeak isAtomic:NO]; 16 | } 17 | 18 | - (NSObject *)subObj { 19 | return [self associatedObjectForKey:@"subObj"]; 20 | } 21 | 22 | - (void)setSuperObj:(NSObject *)superObj { 23 | [self setAssociatedObject:superObj forKey:@"superObj" association:NSAssociationWeak isAtomic:NO]; 24 | } 25 | 26 | - (NSObject *)superObj { 27 | return [self associatedObjectForKey:@"superObj"]; 28 | } 29 | 30 | @end 31 | -------------------------------------------------------------------------------- /Assosiation/NSObject+Dealloc.m: -------------------------------------------------------------------------------- 1 | // 2 | // NSObject+Dealloc.m 3 | // RuntimeWeak 4 | // 5 | // Created by unique on 16/8/11. 6 | // Copyright © 2016年 unique. All rights reserved. 7 | // 8 | 9 | #import "NSObject+Dealloc.h" 10 | 11 | #import 12 | 13 | #import "MUDeallocTask.h" 14 | 15 | @implementation NSObject (Dealloc) 16 | 17 | static const char kTask = '0'; 18 | 19 | - (MUDeallocTask *)deallocTask { 20 | MUDeallocTask *task = objc_getAssociatedObject(self, &kTask); 21 | if (!task) { 22 | task = [MUDeallocTask new]; 23 | objc_setAssociatedObject(self, &kTask, task, OBJC_ASSOCIATION_RETAIN_NONATOMIC); 24 | } 25 | return task; 26 | } 27 | 28 | - (void)addDeallocTask:(DeallocBlock)task forTarget:(id)target key:(NSString *)key { 29 | [self.deallocTask addTask:task forTarget:target key:key]; 30 | } 31 | 32 | - (void)removeDeallocTaskForTarget:(id)target key:(NSString *)key { 33 | [self.deallocTask removeTaskForTarget:target key:key]; 34 | } 35 | 36 | @end 37 | -------------------------------------------------------------------------------- /Demo-PlanStep-2/Demo-PlanStep-2/MUHostClass+Association.m: -------------------------------------------------------------------------------- 1 | // 2 | // MUHostClass+Association.m 3 | // Demo-PlanStep-2 4 | // 5 | // Created by 吴双 on 16/8/13. 6 | // Copyright © 2016年 unique. All rights reserved. 7 | // 8 | 9 | #import "MUHostClass+Association.h" 10 | #import 11 | #import "NSObject+MUWeakTask.h" 12 | 13 | @implementation MUHostClass (Association) 14 | 15 | const static char kValueObject = '0'; 16 | 17 | - (void)setValueObject:(MUValueClass *)valueObject { 18 | objc_setAssociatedObject(self, &kValueObject, valueObject, OBJC_ASSOCIATION_ASSIGN); 19 | /** 20 | * 虽然这里没有循环引用，但是还是需要用弱引用丢给 block 21 | * 因为 valueObj 持有 weakTask，weakTask 持有 block，block 持有 self 22 | * 因此 self 至少要等到 valueObj 销毁后才能销毁。严重影响到 self 的生命周期 23 | * 这是参考答案中的一个缺点 24 | * 25 | * 而使用传递 block 的方式清空属性，而不是传递 set 方法的 SEL 的方式，是为了防止形成递归 26 | */ 27 | __weak typeof(self) wself = self; 28 | [valueObject setWeakReferenceTask:^{ 29 | objc_setAssociatedObject(wself, &kValueObject, nil, OBJC_ASSOCIATION_ASSIGN); 30 | }]; 31 | } 32 | 33 | - (MUValueClass *)valueObject { 34 | return objc_getAssociatedObject(self, &kValueObject); 35 | } 36 | 37 | @end 38 | -------------------------------------------------------------------------------- /Demo-PlanStep-Release/Demo-PlanStep-Release/main.m: -------------------------------------------------------------------------------- 1 | // 2 | // main.m 3 | // Demo-PlanStep-Release 4 | // 5 | // Created by 吴双 on 16/8/14. 6 | // Copyright © 2016年 unique. All rights reserved. 7 | // 8 | 9 | #import 10 | 11 | #import "NSObject+SubObj.h" 12 | 13 | void scene0() { 14 | // 场景零，一般情况 15 | @autoreleasepool { 16 | NSObject *hostObj = [NSObject new]; 17 | @autoreleasepool { 18 | NSObject *valueObj = [NSObject new]; 19 | hostObj.subObj = valueObj; 20 | NSLog(@"SENE-0 set value: %@", hostObj.subObj); 21 | } 22 | NSLog(@"SENE-0 after release: %@", hostObj.subObj); 23 | } 24 | } 25 | 26 | void scene1() { 27 | // 场景一，host 重复设置值 28 | 29 | @autoreleasepool { 30 | // 旧值先销毁 31 | NSObject *hostObj = NSObject.new; 32 | NSObject *newValue = NSObject.new; 33 | @autoreleasepool { 34 | NSObject *oldValue = NSObject.new; 35 | hostObj.subObj = oldValue; 36 | NSLog(@"SENE-1.1 set old value: %@", hostObj.subObj); 37 | hostObj.subObj = newValue; 38 | NSLog(@"SENE-1.1 set new value: %@", hostObj.subObj); 39 | } 40 | NSLog(@"SENE-1.1 after release old: %@", hostObj.subObj); 41 | } 42 | 43 | NSLog(@"-------------------------"); 44 | 45 | @autoreleasepool { 46 | // 新值先销毁 47 | NSObject *hostObj = NSObject.new; 48 | NSObject *oldValue = NSObject.new; 49 | hostObj.subObj = oldValue; 50 | NSLog(@"SENE-1.2 set old value: %@", hostObj.subObj); 51 | @autoreleasepool { 52 | NSObject *newValue = NSObject.new; 53 | hostObj.subObj = newValue; 54 | NSLog(@"SENE-1.2 set new value: %@", hostObj.subObj); 55 | } 56 | NSLog(@"SENE-1.2 after release new: %@", hostObj.subObj); 57 | } 58 | } 59 | 60 | void scene2() { 61 | // 场景二【同 host + 不同属性】 62 | @autoreleasepool { 63 | NSObject *hostObj = NSObject.new; 64 | @autoreleasepool { 65 | NSObject *valueObj = NSObject.new; 66 | hostObj.subObj = valueObj; 67 | hostObj.superObj = valueObj; 68 | NSLog(@"%@, %@", hostObj.subObj, hostObj.superObj); 69 | } 70 | NSLog(@"%@, %@", hostObj.subObj, hostObj.superObj); 71 | } 72 | } 73 | 74 | void scene3() { 75 | // 场景三【不同 host + 同属性】 76 | @autoreleasepool { 77 | NSObject *hostObj1 = NSObject.new; 78 | NSObject *hostObj2 = NSObject.new; 79 | @autoreleasepool { 80 | NSObject *valueObj = NSObject.new; 81 | hostObj1.subObj = valueObj; 82 | hostObj2.subObj = valueObj; 83 | NSLog(@"%@, %@", hostObj1.subObj, hostObj2.subObj); 84 | } 85 | NSLog(@"%@, %@", hostObj1.subObj, hostObj2.subObj); 86 | } 87 | } 88 | 89 | int main(int argc, const char * argv[]) { 90 | @autoreleasepool { 91 | scene2(); 92 | } 93 | return 0; 94 | } 95 | -------------------------------------------------------------------------------- /Assosiation/NSObject+Association.m: -------------------------------------------------------------------------------- 1 | // 2 | // NSObject+Association.m 3 | // RuntimeWeak 4 | // 5 | // Created by unique on 16/8/11. 6 | // Copyright © 2016年 unique. All rights reserved. 7 | // 8 | 9 | #import "NSObject+Association.h" 10 | 11 | #import 12 | 13 | #import "NSObject+Dealloc.h" 14 | 15 | static NSMutableDictionary *keyBuffer; 16 | 17 | @implementation NSObject (Association) 18 | 19 | + (void)load { 20 | keyBuffer = [NSMutableDictionary dictionary]; 21 | } 22 | 23 | - (void)setAssociatedObject:(id)object forKey:(NSString *)key association:(NSAssociation)association isAtomic:(BOOL)isAtomic { 24 | const char *cKey = [keyBuffer[key] pointerValue]; 25 | if (cKey == NULL) { 26 | cKey = key.UTF8String; 27 | keyBuffer[key] = [NSValue valueWithPointer:cKey]; 28 | } 29 | switch (association) { 30 | case NSAssociationAssign: 31 | objc_setAssociatedObject(self, cKey, object, OBJC_ASSOCIATION_ASSIGN); 32 | break; 33 | case NSAssociationRetain: 34 | if (isAtomic) { 35 | objc_setAssociatedObject(self, cKey, object, OBJC_ASSOCIATION_RETAIN); 36 | } else { 37 | 38 | objc_setAssociatedObject(self, cKey, object, OBJC_ASSOCIATION_RETAIN_NONATOMIC); 39 | } 40 | break; 41 | case NSAssociationCopy: 42 | if (isAtomic) { 43 | objc_setAssociatedObject(self, cKey, object, OBJC_ASSOCIATION_COPY); 44 | } else { 45 | 46 | objc_setAssociatedObject(self, cKey, object, OBJC_ASSOCIATION_COPY_NONATOMIC); 47 | } 48 | break; 49 | case NSAssociationWeak: 50 | [self _setWeakObject:object forKey:key]; 51 | break; 52 | default: 53 | break; 54 | } 55 | } 56 | 57 | - (void)_setWeakObject:(id)object forKey:(NSString *)key { 58 | const char *cKey = [keyBuffer[key] pointerValue]; 59 | __weak typeof(self) wself = self; 60 | 61 | id oldObj = objc_getAssociatedObject(self, cKey); 62 | [oldObj removeDeallocTaskForTarget:wself key:key]; 63 | 64 | objc_setAssociatedObject(self, cKey, object, OBJC_ASSOCIATION_ASSIGN); 65 | [object addDeallocTask:^{ 66 | objc_setAssociatedObject(wself, cKey, nil, OBJC_ASSOCIATION_ASSIGN); 67 | } forTarget:wself key:key]; 68 | } 69 | 70 | - (id)associatedObjectForKey:(NSString *)key { 71 | const char *cKey = [keyBuffer[key] pointerValue]; 72 | if (cKey == NULL) { 73 | return nil; 74 | } else { 75 | return objc_getAssociatedObject(self, cKey); 76 | } 77 | } 78 | 79 | @end 80 | -------------------------------------------------------------------------------- /Assosiation/MUDeallocTask.m: -------------------------------------------------------------------------------- 1 | // 2 | // MUDeallocTask.m 3 | // RuntimeWeak 4 | // 5 | // Created by unique on 16/8/11. 6 | // Copyright © 2016年 unique. All rights reserved. 7 | // 8 | 9 | #import "MUDeallocTask.h" 10 | 11 | 12 | @interface MUDeallocTaskItem : NSObject 13 | 14 | @property (nonatomic, weak, readonly) id target; 15 | @property (nonatomic, copy, readonly) NSString *key; 16 | @property (nonatomic, copy, readonly) DeallocBlock task; 17 | 18 | - (instancetype)initWithTarget:(id)target key:(NSString *)key task:(DeallocBlock)task; 19 | + (instancetype)taskItemWithTarget:(id)target key:(NSString *)key task:(DeallocBlock)task; 20 | 21 | @end 22 | 23 | @interface MUDeallocTask () 24 | 25 | @property (nonatomic, strong) NSMutableSet *taskSet; 26 | 27 | @end 28 | 29 | 30 | @implementation MUDeallocTask 31 | 32 | - (void)addTask:(DeallocBlock)task forTarget:(id)target key:(NSString *)key { 33 | MUDeallocTaskItem *taskItem = [MUDeallocTaskItem taskItemWithTarget:target key:key task:task]; 34 | if ([self.taskSet containsObject:taskItem]) { 35 | [self.taskSet removeObject:taskItem]; 36 | } 37 | [self.taskSet addObject:taskItem]; 38 | } 39 | 40 | - (void)removeTaskForTarget:(id)target key:(NSString *)key { 41 | MUDeallocTaskItem *taskItem = [MUDeallocTaskItem taskItemWithTarget:target key:key task:nil]; 42 | [self.taskSet removeObject:taskItem]; // remove task with method named 'isEqual:'. 43 | } 44 | 45 | - (void)dealloc { 46 | [_taskSet enumerateObjectsWithOptions:NSEnumerationConcurrent usingBlock:^(id _Nonnull obj, BOOL * _Nonnull stop) { 47 | MUDeallocTaskItem *item = obj; 48 | !item.task?:item.task(); // run script to clean all weak references to 'self'. 49 | }]; 50 | } 51 | 52 | - (NSMutableSet *)taskSet { 53 | if (!_taskSet) { 54 | _taskSet = [NSMutableSet set]; 55 | } 56 | return _taskSet; 57 | } 58 | 59 | @end 60 | 61 | 62 | @implementation MUDeallocTaskItem 63 | 64 | - (instancetype)initWithTarget:(id)target key:(NSString *)key task:(DeallocBlock)task { 65 | self = [super init]; 66 | if (self) { 67 | _target = target; 68 | _key = key; 69 | _task = [task copy]; 70 | } 71 | return self; 72 | } 73 | 74 | + (instancetype)taskItemWithTarget:(id)target key:(NSString *)key task:(DeallocBlock)task { 75 | return [[self alloc] initWithTarget:target key:key task:task]; 76 | } 77 | 78 | - (BOOL)isEqual:(id)object { 79 | if (object == self) { 80 | return YES; 81 | } else if (![object isKindOfClass:[self class]]) { 82 | return NO; 83 | } else { 84 | MUDeallocTaskItem *another = (MUDeallocTaskItem *)object; 85 | return [another.target isEqual:self.target] && [another.key isEqualToString:self.key]; 86 | } 87 | } 88 | 89 | /** 90 | * 瞎写一个hash来快速查找 91 | * 92 | * @return NSUInteger 93 | */ 94 | - (NSUInteger)hash { 95 | NSObject *target = self.target; 96 | return (target.hash + self.key.hash) / 2; 97 | } 98 | 99 | @end 100 | 101 | -------------------------------------------------------------------------------- /Demo-PlanStep-1/Demo-PlanStep-1.xcodeproj/xcuserdata/Unique.xcuserdatad/xcschemes/Demo-PlanStep-1.xcscheme: -------------------------------------------------------------------------------- 1 | 2 | 5 | 8 | 9 | 15 | 21 | 22 | 23 | 24 | 25 | 30 | 31 | 32 | 33 | 39 | 40 | 41 | 42 | 43 | 44 | 54 | 56 | 62 | 63 | 64 | 65 | 66 | 67 | 73 | 75 | 81 | 82 | 83 | 84 | 86 | 87 | 90 | 91 | 92 | -------------------------------------------------------------------------------- /Demo-PlanStep-2/Demo-PlanStep-2.xcodeproj/xcuserdata/Unique.xcuserdatad/xcschemes/Demo-PlanStep-2.xcscheme: -------------------------------------------------------------------------------- 1 | 2 | 5 | 8 | 9 | 15 | 21 | 22 | 23 | 24 | 25 | 30 | 31 | 32 | 33 | 39 | 40 | 41 | 42 | 43 | 44 | 54 | 56 | 62 | 63 | 64 | 65 | 66 | 67 | 73 | 75 | 81 | 82 | 83 | 84 | 86 | 87 | 90 | 91 | 92 | -------------------------------------------------------------------------------- /Demo-PlanStep-Release/Demo-PlanStep-Release.xcodeproj/xcuserdata/Unique.xcuserdatad/xcschemes/Demo-PlanStep-Release.xcscheme: -------------------------------------------------------------------------------- 1 | 2 | 5 | 8 | 9 | 15 | 21 | 22 | 23 | 24 | 25 | 30 | 31 | 32 | 33 | 39 | 40 | 41 | 42 | 43 | 44 | 54 | 56 | 62 | 63 | 64 | 65 | 66 | 67 | 73 | 75 | 81 | 82 | 83 | 84 | 86 | 87 | 90 | 91 | 92 | -------------------------------------------------------------------------------- /Demo-PlanStep-1/Demo-PlanStep-1.xcodeproj/project.pbxproj: -------------------------------------------------------------------------------- 1 | // !$*UTF8*$! 2 | { 3 | archiveVersion = 1; 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