├── .travis.yml
├── NSDictionary-NilSafe.xcodeproj
├── project.xcworkspace
│ └── contents.xcworkspacedata
├── xcshareddata
│ └── xcschemes
│ │ ├── Tests.xcscheme
│ │ └── NSDictionary-NilSafe.xcscheme
└── project.pbxproj
├── NSDictionary-NilSafe
├── NSDictionary+NilSafe.h
└── NSDictionary+NilSafe.m
├── Tests
├── Info.plist
└── Tests.m
├── LICENSE
├── .gitignore
├── README.md
└── NSDictionary-NilSafe.podspec
/.travis.yml:
--------------------------------------------------------------------------------
1 | osx_image: xcode7.3
2 | language: objective-c
3 | script:
4 | - set -o pipefail && xcodebuild test -project NSDictionary-NilSafe.xcodeproj -scheme Tests -sdk iphonesimulator ONLY_ACTIVE_ARCH=NO | xcpretty
5 | - pod lib lint
6 |
--------------------------------------------------------------------------------
/NSDictionary-NilSafe.xcodeproj/project.xcworkspace/contents.xcworkspacedata:
--------------------------------------------------------------------------------
1 |
2 |
4 |
6 |
7 |
8 |
--------------------------------------------------------------------------------
/NSDictionary-NilSafe/NSDictionary+NilSafe.h:
--------------------------------------------------------------------------------
1 | //
2 | // NSDictionary+NilSafe.h
3 | // NSDictionary-NilSafe
4 | //
5 | // Created by Allen Hsu on 6/22/16.
6 | // Copyright © 2016 Glow Inc. All rights reserved.
7 | //
8 |
9 | #import
10 |
11 | @interface NSDictionary (NilSafe)
12 |
13 | @end
14 |
15 | @interface NSMutableDictionary (NilSafe)
16 |
17 | @end
18 |
--------------------------------------------------------------------------------
/Tests/Info.plist:
--------------------------------------------------------------------------------
1 |
2 |
3 |
4 |
5 | CFBundleDevelopmentRegion
6 | en
7 | CFBundleExecutable
8 | $(EXECUTABLE_NAME)
9 | CFBundleIdentifier
10 | $(PRODUCT_BUNDLE_IDENTIFIER)
11 | CFBundleInfoDictionaryVersion
12 | 6.0
13 | CFBundleName
14 | $(PRODUCT_NAME)
15 | CFBundlePackageType
16 | BNDL
17 | CFBundleShortVersionString
18 | 1.0
19 | CFBundleSignature
20 | ????
21 | CFBundleVersion
22 | 1
23 |
24 |
25 |
--------------------------------------------------------------------------------
/LICENSE:
--------------------------------------------------------------------------------
1 | Copyright (c) 2016 Allen Hsu
2 |
3 | Permission is hereby granted, free of charge, to any person obtaining a copy
4 | of this software and associated documentation files (the "Software"), to deal
5 | in the Software without restriction, including without limitation the rights
6 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
7 | copies of the Software, and to permit persons to whom the Software is
8 | furnished to do so, subject to the following conditions:
9 |
10 | The above copyright notice and this permission notice shall be included in
11 | all copies or substantial portions of the Software.
12 |
13 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
14 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
15 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
16 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
17 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
18 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
19 | THE SOFTWARE.
20 |
--------------------------------------------------------------------------------
/.gitignore:
--------------------------------------------------------------------------------
1 |
2 | # Created by https://www.gitignore.io/api/objc,xcode,osx
3 |
4 | #!! ERROR: objc is undefined. Use list command to see defined gitignore types !!#
5 |
6 | ### Xcode ###
7 | # Xcode
8 | #
9 | # gitignore contributors: remember to update Global/Xcode.gitignore, Objective-C.gitignore & Swift.gitignore
10 |
11 | ## Build generated
12 | build/
13 | DerivedData/
14 |
15 | ## Various settings
16 | *.pbxuser
17 | !default.pbxuser
18 | *.mode1v3
19 | !default.mode1v3
20 | *.mode2v3
21 | !default.mode2v3
22 | *.perspectivev3
23 | !default.perspectivev3
24 | xcuserdata/
25 |
26 | ## Other
27 | *.moved-aside
28 | *.xccheckout
29 | *.xcscmblueprint
30 |
31 |
32 | ### OSX ###
33 | *.DS_Store
34 | .AppleDouble
35 | .LSOverride
36 |
37 | # Icon must end with two \r
38 | Icon
39 |
40 | # Thumbnails
41 | ._*
42 |
43 | # Files that might appear in the root of a volume
44 | .DocumentRevisions-V100
45 | .fseventsd
46 | .Spotlight-V100
47 | .TemporaryItems
48 | .Trashes
49 | .VolumeIcon.icns
50 | .com.apple.timemachine.donotpresent
51 |
52 | # Directories potentially created on remote AFP share
53 | .AppleDB
54 | .AppleDesktop
55 | Network Trash Folder
56 | Temporary Items
57 | .apdisk
58 |
--------------------------------------------------------------------------------
/README.md:
--------------------------------------------------------------------------------
1 | # NSDictionary-NilSafe
2 |
3 | How we made NSDictionary nil safe at Glow, read more on [Glow Tech Blog](http://tech.glowing.com/cn/how-we-made-nsdictionary-nil-safe/).
4 |
5 | [](https://travis-ci.org/allenhsu/NSDictionary-NilSafe)
6 | [](http://cocoapods.org/pods/NSDictionary-NilSafe)
7 | [](http://cocoapods.org/pods/NSDictionary-NilSafe)
8 | [](http://cocoapods.org/pods/NSDictionary-NilSafe)
9 |
10 | ## Example
11 |
12 | To run the example project, clone the repo, and run `pod install` from the Example directory first.
13 |
14 | ## Requirements
15 |
16 | ## Installation
17 |
18 | NSDictionary-NilSafe is available through [CocoaPods](http://cocoapods.org). To install
19 | it, simply add the following line to your Podfile:
20 |
21 | ```ruby
22 | pod "NSDictionary-NilSafe"
23 | ```
24 |
25 | ## Author
26 |
27 | Allen Hsu, allen@glowing.com
28 |
29 | ## License
30 |
31 | NSDictionary-NilSafe is available under the MIT license. See the LICENSE file for more info.
32 |
--------------------------------------------------------------------------------
/NSDictionary-NilSafe.podspec:
--------------------------------------------------------------------------------
1 | #
2 | # Be sure to run `pod lib lint NSDictionary-NilSafe.podspec' to ensure this is a
3 | # valid spec before submitting.
4 | #
5 | # Any lines starting with a # are optional, but their use is encouraged
6 | # To learn more about a Podspec see http://guides.cocoapods.org/syntax/podspec.html
7 | #
8 |
9 | Pod::Spec.new do |s|
10 | s.name = 'NSDictionary-NilSafe'
11 | s.version = '0.2.0'
12 | s.summary = 'Nil safe dictionary'
13 |
14 | # This description is used to generate tags and improve search results.
15 | # * Think: What does it do? Why did you write it? What is the focus?
16 | # * Try to keep it short, snappy and to the point.
17 | # * Write the description between the DESC delimiters below.
18 | # * Finally, don't worry about the indent, CocoaPods strips it!
19 |
20 | s.description = <<-DESC
21 | With this category, now you can insert nil into NSDictionary, which will be replaced with NSNull, and NSNull is safer now, which can take any arbitrary method calls like nil.
22 | DESC
23 |
24 | s.homepage = 'https://github.com/allenhsu/NSDictionary-NilSafe'
25 | # s.screenshots = 'www.example.com/screenshots_1', 'www.example.com/screenshots_2'
26 | s.license = { :type => 'MIT', :file => 'LICENSE' }
27 | s.author = { 'Allen Hsu' => 'allen@glowing.com' }
28 | s.source = { :git => 'https://github.com/allenhsu/NSDictionary-NilSafe.git', :tag => s.version.to_s }
29 | # s.social_media_url = 'https://twitter.com/'
30 |
31 | s.ios.deployment_target = '8.0'
32 |
33 | s.source_files = 'NSDictionary-NilSafe/*.{m,h}'
34 |
35 | # s.resource_bundles = {
36 | # 'NSDictionary-NilSafe' => ['NSDictionary-NilSafe/Assets/*.png']
37 | # }
38 |
39 | # s.public_header_files = 'Pod/Classes/**/*.h'
40 | # s.frameworks = 'UIKit', 'MapKit'
41 | # s.dependency 'AFNetworking', '~> 2.3'
42 | end
43 |
--------------------------------------------------------------------------------
/NSDictionary-NilSafe.xcodeproj/xcshareddata/xcschemes/Tests.xcscheme:
--------------------------------------------------------------------------------
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57 |
--------------------------------------------------------------------------------
/Tests/Tests.m:
--------------------------------------------------------------------------------
1 | //
2 | // Tests.m
3 | // Tests
4 | //
5 | // Created by Allen Hsu on 6/22/16.
6 | // Copyright © 2016 Glow Inc. All rights reserved.
7 | //
8 |
9 | #import
10 | #import "NSDictionary+NilSafe.h"
11 |
12 | @interface Tests : XCTestCase
13 |
14 | @end
15 |
16 | @implementation Tests
17 |
18 | - (void)setUp {
19 | [super setUp];
20 | }
21 |
22 | - (void)tearDown {
23 | [super tearDown];
24 | }
25 |
26 | - (void)testLiteral {
27 | id nilVal = nil;
28 | id nilKey = nil;
29 | id nonNilKey = @"non-nil-key";
30 | id nonNilVal = @"non-nil-val";
31 | NSDictionary *dict = @{
32 | nonNilKey: nilVal,
33 | nilKey: nonNilVal,
34 | };
35 | XCTAssertEqualObjects([dict allKeys], @[]);
36 | XCTAssertNoThrow([dict objectForKey:nonNilKey]);
37 | id val = dict[nonNilKey];
38 | XCTAssertNil(val);
39 | XCTAssertNoThrow([val length]);
40 | XCTAssertNoThrow([val count]);
41 | XCTAssertNoThrow([val anyObject]);
42 | XCTAssertNoThrow([val intValue]);
43 | XCTAssertNoThrow([val integerValue]);
44 | }
45 |
46 | - (void)testKeyedSubscript {
47 | NSMutableDictionary *dict = [NSMutableDictionary dictionary];
48 | id nilVal = nil;
49 | id nilKey = nil;
50 | id nonNilKey = @"non-nil-key";
51 | id nonNilVal = @"non-nil-val";
52 | dict[nonNilKey] = nilVal;
53 | dict[nilKey] = nonNilVal;
54 | XCTAssertEqualObjects([dict allKeys], @[]);
55 | XCTAssertNoThrow([dict objectForKey:nonNilKey]);
56 | }
57 |
58 | - (void)testSetObject {
59 | NSMutableDictionary *dict = [NSMutableDictionary dictionary];
60 | id nilVal = nil;
61 | id nilKey = nil;
62 | id nonNilKey = @"non-nil-key";
63 | id nonNilVal = @"non-nil-val";
64 | [dict setObject:nilVal forKey:nonNilKey];
65 | [dict setObject:nonNilVal forKey:nilKey];
66 | XCTAssertEqualObjects([dict allKeys], @[]);
67 | XCTAssertNoThrow([dict objectForKey:nonNilKey]);
68 | }
69 |
70 | - (void)testArchive {
71 | id nilVal = nil;
72 | id nilKey = nil;
73 | id nonNilKey = @"non-nil-key";
74 | id nonNilVal = @"non-nil-val";
75 | NSDictionary *dict = @{
76 | nonNilKey: nilVal,
77 | nilKey: nonNilVal,
78 | };
79 | NSData *data = [NSKeyedArchiver archivedDataWithRootObject:dict];
80 | NSDictionary *dict2 = [NSKeyedUnarchiver unarchiveObjectWithData:data];
81 | XCTAssertEqualObjects([dict2 allKeys], @[]);
82 | XCTAssertNoThrow([dict2 objectForKey:nonNilKey]);
83 | }
84 |
85 | - (void)testJSON {
86 | id nilVal = nil;
87 | id nilKey = nil;
88 | id nonNilKey = @"non-nil-key";
89 | id nonNilVal = @"non-nil-val";
90 | NSDictionary *dict = @{
91 | nonNilKey: nilVal,
92 | nilKey: nonNilVal,
93 | };
94 | NSData *data = [NSJSONSerialization dataWithJSONObject:dict options:0 error:NULL];
95 | NSString *jsonString = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
96 | NSString *expectedString = @"{}";
97 | XCTAssertEqualObjects(jsonString, expectedString);
98 | }
99 |
100 | @end
101 |
--------------------------------------------------------------------------------
/NSDictionary-NilSafe/NSDictionary+NilSafe.m:
--------------------------------------------------------------------------------
1 | //
2 | // NSDictionary+NilSafe.m
3 | // NSDictionary-NilSafe
4 | //
5 | // Created by Allen Hsu on 6/22/16.
6 | // Copyright © 2016 Glow Inc. All rights reserved.
7 | //
8 |
9 | #import
10 | #import "NSDictionary+NilSafe.h"
11 |
12 | @implementation NSObject (Swizzling)
13 |
14 | + (BOOL)gl_swizzleMethod:(SEL)origSel withMethod:(SEL)altSel {
15 | Method origMethod = class_getInstanceMethod(self, origSel);
16 | Method altMethod = class_getInstanceMethod(self, altSel);
17 | if (!origMethod || !altMethod) {
18 | return NO;
19 | }
20 | class_addMethod(self,
21 | origSel,
22 | class_getMethodImplementation(self, origSel),
23 | method_getTypeEncoding(origMethod));
24 | class_addMethod(self,
25 | altSel,
26 | class_getMethodImplementation(self, altSel),
27 | method_getTypeEncoding(altMethod));
28 | method_exchangeImplementations(class_getInstanceMethod(self, origSel),
29 | class_getInstanceMethod(self, altSel));
30 | return YES;
31 | }
32 |
33 | + (BOOL)gl_swizzleClassMethod:(SEL)origSel withMethod:(SEL)altSel {
34 | return [object_getClass((id)self) gl_swizzleMethod:origSel withMethod:altSel];
35 | }
36 |
37 | @end
38 |
39 | @implementation NSDictionary (NilSafe)
40 |
41 | + (void)load {
42 | static dispatch_once_t onceToken;
43 | dispatch_once(&onceToken, ^{
44 | [self gl_swizzleMethod:@selector(initWithObjects:forKeys:count:) withMethod:@selector(gl_initWithObjects:forKeys:count:)];
45 | [self gl_swizzleClassMethod:@selector(dictionaryWithObjects:forKeys:count:) withMethod:@selector(gl_dictionaryWithObjects:forKeys:count:)];
46 | });
47 | }
48 |
49 | + (instancetype)gl_dictionaryWithObjects:(const id [])objects forKeys:(const id [])keys count:(NSUInteger)cnt {
50 | id safeObjects[cnt];
51 | id safeKeys[cnt];
52 | NSUInteger j = 0;
53 | for (NSUInteger i = 0; i < cnt; i++) {
54 | id key = keys[i];
55 | id obj = objects[i];
56 | if (!key || !obj) {
57 | continue;
58 | }
59 | safeKeys[j] = key;
60 | safeObjects[j] = obj;
61 | j++;
62 | }
63 | return [self gl_dictionaryWithObjects:safeObjects forKeys:safeKeys count:j];
64 | }
65 |
66 | - (instancetype)gl_initWithObjects:(const id [])objects forKeys:(const id [])keys count:(NSUInteger)cnt {
67 | id safeObjects[cnt];
68 | id safeKeys[cnt];
69 | NSUInteger j = 0;
70 | for (NSUInteger i = 0; i < cnt; i++) {
71 | id key = keys[i];
72 | id obj = objects[i];
73 | if (!key || !obj) {
74 | continue;
75 | }
76 | if (!obj) {
77 | obj = [NSNull null];
78 | }
79 | safeKeys[j] = key;
80 | safeObjects[j] = obj;
81 | j++;
82 | }
83 | return [self gl_initWithObjects:safeObjects forKeys:safeKeys count:j];
84 | }
85 |
86 | @end
87 |
88 | @implementation NSMutableDictionary (NilSafe)
89 |
90 | + (void)load {
91 | static dispatch_once_t onceToken;
92 | dispatch_once(&onceToken, ^{
93 | Class class = NSClassFromString(@"__NSDictionaryM");
94 | [class gl_swizzleMethod:@selector(setObject:forKey:) withMethod:@selector(gl_setObject:forKey:)];
95 | [class gl_swizzleMethod:@selector(setObject:forKeyedSubscript:) withMethod:@selector(gl_setObject:forKeyedSubscript:)];
96 | });
97 | }
98 |
99 | - (void)gl_setObject:(id)anObject forKey:(id)aKey {
100 | if (!aKey || !anObject) {
101 | return;
102 | }
103 | [self gl_setObject:anObject forKey:aKey];
104 | }
105 |
106 | - (void)gl_setObject:(id)obj forKeyedSubscript:(id)key {
107 | if (!key || !obj) {
108 | return;
109 | }
110 | [self gl_setObject:obj forKeyedSubscript:key];
111 | }
112 |
113 | @end
114 |
--------------------------------------------------------------------------------
/NSDictionary-NilSafe.xcodeproj/xcshareddata/xcschemes/NSDictionary-NilSafe.xcscheme:
--------------------------------------------------------------------------------
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--------------------------------------------------------------------------------
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--------------------------------------------------------------------------------
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