├── QHShowTextDemo.xcodeproj
    ├── project.pbxproj
    ├── project.xcworkspace
    │   ├── contents.xcworkspacedata
    │   ├── xcshareddata
    │   │   └── IDEWorkspaceChecks.plist
    │   └── xcuserdata
    │   │   └── chen.xcuserdatad
    │   │       └── UserInterfaceState.xcuserstate
    └── xcuserdata
    │   └── chen.xcuserdatad
    │       ├── xcdebugger
    │           └── Breakpoints_v2.xcbkptlist
    │       └── xcschemes
    │           └── xcschememanagement.plist
├── QHShowTextDemo
    ├── AppDelegate.swift
    ├── Base.lproj
    │   ├── LaunchScreen.storyboard
    │   └── Main.storyboard
    ├── Info.plist
    ├── QHShowTextMan
    │   ├── QHTextConfig.swift
    │   ├── QHTextManager.swift
    │   ├── QHTextTestConfig.swift
    │   ├── QHTextView.swift
    │   └── QHTextViewAnimate.swift
    └── ViewController.swift
├── README.md
└── screenshots
    └── QHTextShowDemo.gif


/QHShowTextDemo.xcodeproj/project.pbxproj:
--------------------------------------------------------------------------------
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/QHShowTextDemo.xcodeproj/xcuserdata/chen.xcuserdatad/xcdebugger/Breakpoints_v2.xcbkptlist:
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1 | <?xml version="1.0" encoding="UTF-8"?>
2 | <Bucket
3 |    type = "1"
4 |    version = "2.0">
5 | </Bucket>
6 | 


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/QHShowTextDemo.xcodeproj/xcuserdata/chen.xcuserdatad/xcschemes/xcschememanagement.plist:
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 1 | <?xml version="1.0" encoding="UTF-8"?>
 2 | <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
 3 | <plist version="1.0">
 4 | <dict>
 5 | 	<key>SchemeUserState</key>
 6 | 	<dict>
 7 | 		<key>QHShowTextDemo.xcscheme</key>
 8 | 		<dict>
 9 | 			<key>orderHint</key>
10 | 			<integer>0</integer>
11 | 		</dict>
12 | 	</dict>
13 | </dict>
14 | </plist>
15 | 


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/QHShowTextDemo/AppDelegate.swift:
--------------------------------------------------------------------------------
 1 | //
 2 | //  AppDelegate.swift
 3 | //  QHShowTextDemo
 4 | //
 5 | //  Created by Anakin chen on 2018/7/9.
 6 | //  Copyright © 2018年 Chen Network Technology. All rights reserved.
 7 | //
 8 | 
 9 | import UIKit
10 | 
11 | @UIApplicationMain
12 | class AppDelegate: UIResponder, UIApplicationDelegate {
13 | 
14 |     var window: UIWindow?
15 | 
16 | 
17 |     func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
18 |         // Override point for customization after application launch.
19 |         return true
20 |     }
21 | 
22 |     func applicationWillResignActive(_ application: UIApplication) {
23 |         // Sent when the application is about to move from active to inactive state. This can occur for certain types of temporary interruptions (such as an incoming phone call or SMS message) or when the user quits the application and it begins the transition to the background state.
24 |         // Use this method to pause ongoing tasks, disable timers, and invalidate graphics rendering callbacks. Games should use this method to pause the game.
25 |     }
26 | 
27 |     func applicationDidEnterBackground(_ application: UIApplication) {
28 |         // Use this method to release shared resources, save user data, invalidate timers, and store enough application state information to restore your application to its current state in case it is terminated later.
29 |         // If your application supports background execution, this method is called instead of applicationWillTerminate: when the user quits.
30 |     }
31 | 
32 |     func applicationWillEnterForeground(_ application: UIApplication) {
33 |         // Called as part of the transition from the background to the active state; here you can undo many of the changes made on entering the background.
34 |     }
35 | 
36 |     func applicationDidBecomeActive(_ application: UIApplication) {
37 |         // Restart any tasks that were paused (or not yet started) while the application was inactive. If the application was previously in the background, optionally refresh the user interface.
38 |     }
39 | 
40 |     func applicationWillTerminate(_ application: UIApplication) {
41 |         // Called when the application is about to terminate. Save data if appropriate. See also applicationDidEnterBackground:.
42 |     }
43 | 
44 | 
45 | }
46 | 
47 | 


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/QHShowTextDemo/Base.lproj/LaunchScreen.storyboard:
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 1 | <?xml version="1.0" encoding="UTF-8" standalone="no"?>
 2 | <document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="13122.16" systemVersion="17A277" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" launchScreen="YES" useTraitCollections="YES" useSafeAreas="YES" colorMatched="YES" initialViewController="01J-lp-oVM">
 3 |     <dependencies>
 4 |         <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="13104.12"/>
 5 |         <capability name="Safe area layout guides" minToolsVersion="9.0"/>
 6 |         <capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
 7 |     </dependencies>
 8 |     <scenes>
 9 |         <!--View Controller-->
10 |         <scene sceneID="EHf-IW-A2E">
11 |             <objects>
12 |                 <viewController id="01J-lp-oVM" sceneMemberID="viewController">
13 |                     <view key="view" contentMode="scaleToFill" id="Ze5-6b-2t3">
14 |                         <rect key="frame" x="0.0" y="0.0" width="375" height="667"/>
15 |                         <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
16 |                         <color key="backgroundColor" red="1" green="1" blue="1" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
17 |                         <viewLayoutGuide key="safeArea" id="6Tk-OE-BBY"/>
18 |                     </view>
19 |                 </viewController>
20 |                 <placeholder placeholderIdentifier="IBFirstResponder" id="iYj-Kq-Ea1" userLabel="First Responder" sceneMemberID="firstResponder"/>
21 |             </objects>
22 |             <point key="canvasLocation" x="53" y="375"/>
23 |         </scene>
24 |     </scenes>
25 | </document>
26 | 


--------------------------------------------------------------------------------
/QHShowTextDemo/Base.lproj/Main.storyboard:
--------------------------------------------------------------------------------
 1 | <?xml version="1.0" encoding="UTF-8"?>
 2 | <document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="14113" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" useSafeAreas="YES" colorMatched="YES" initialViewController="BYZ-38-t0r">
 3 |     <device id="retina4_7" orientation="portrait">
 4 |         <adaptation id="fullscreen"/>
 5 |     </device>
 6 |     <dependencies>
 7 |         <deployment identifier="iOS"/>
 8 |         <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="14088"/>
 9 |         <capability name="Safe area layout guides" minToolsVersion="9.0"/>
10 |         <capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
11 |     </dependencies>
12 |     <scenes>
13 |         <!--View Controller-->
14 |         <scene sceneID="tne-QT-ifu">
15 |             <objects>
16 |                 <viewController id="BYZ-38-t0r" customClass="ViewController" customModule="QHShowTextDemo" customModuleProvider="target" sceneMemberID="viewController">
17 |                     <view key="view" contentMode="scaleToFill" id="8bC-Xf-vdC">
18 |                         <rect key="frame" x="0.0" y="0.0" width="375" height="667"/>
19 |                         <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
20 |                         <subviews>
21 |                             <button opaque="NO" contentMode="scaleToFill" contentHorizontalAlignment="center" contentVerticalAlignment="center" buttonType="roundedRect" lineBreakMode="middleTruncation" translatesAutoresizingMaskIntoConstraints="NO" id="NlP-5b-O1M">
22 |                                 <rect key="frame" x="154.5" y="318.5" width="66" height="30"/>
23 |                                 <state key="normal" title="ShowText"/>
24 |                                 <connections>
25 |                                     <action selector="showTextAction:" destination="BYZ-38-t0r" eventType="touchUpInside" id="2in-FW-UM4"/>
26 |                                 </connections>
27 |                             </button>
28 |                         </subviews>
29 |                         <color key="backgroundColor" red="1" green="1" blue="1" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
30 |                         <constraints>
31 |                             <constraint firstItem="NlP-5b-O1M" firstAttribute="centerX" secondItem="8bC-Xf-vdC" secondAttribute="centerX" id="fp0-6d-Esk"/>
32 |                             <constraint firstItem="NlP-5b-O1M" firstAttribute="centerY" secondItem="8bC-Xf-vdC" secondAttribute="centerY" id="vaQ-jD-9Vl"/>
33 |                         </constraints>
34 |                         <viewLayoutGuide key="safeArea" id="6Tk-OE-BBY"/>
35 |                     </view>
36 |                 </viewController>
37 |                 <placeholder placeholderIdentifier="IBFirstResponder" id="dkx-z0-nzr" sceneMemberID="firstResponder"/>
38 |             </objects>
39 |         </scene>
40 |     </scenes>
41 | </document>
42 | 


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/QHShowTextDemo/Info.plist:
--------------------------------------------------------------------------------
 1 | <?xml version="1.0" encoding="UTF-8"?>
 2 | <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
 3 | <plist version="1.0">
 4 | <dict>
 5 | 	<key>CFBundleDevelopmentRegion</key>
 6 | 	<string>$(DEVELOPMENT_LANGUAGE)</string>
 7 | 	<key>CFBundleExecutable</key>
 8 | 	<string>$(EXECUTABLE_NAME)</string>
 9 | 	<key>CFBundleIdentifier</key>
10 | 	<string>$(PRODUCT_BUNDLE_IDENTIFIER)</string>
11 | 	<key>CFBundleInfoDictionaryVersion</key>
12 | 	<string>6.0</string>
13 | 	<key>CFBundleName</key>
14 | 	<string>$(PRODUCT_NAME)</string>
15 | 	<key>CFBundlePackageType</key>
16 | 	<string>APPL</string>
17 | 	<key>CFBundleShortVersionString</key>
18 | 	<string>1.0</string>
19 | 	<key>CFBundleVersion</key>
20 | 	<string>1</string>
21 | 	<key>LSRequiresIPhoneOS</key>
22 | 	<true/>
23 | 	<key>UILaunchStoryboardName</key>
24 | 	<string>LaunchScreen</string>
25 | 	<key>UIMainStoryboardFile</key>
26 | 	<string>Main</string>
27 | 	<key>UIRequiredDeviceCapabilities</key>
28 | 	<array>
29 | 		<string>armv7</string>
30 | 	</array>
31 | 	<key>UISupportedInterfaceOrientations</key>
32 | 	<array>
33 | 		<string>UIInterfaceOrientationPortrait</string>
34 | 		<string>UIInterfaceOrientationLandscapeLeft</string>
35 | 		<string>UIInterfaceOrientationLandscapeRight</string>
36 | 	</array>
37 | 	<key>UISupportedInterfaceOrientations~ipad</key>
38 | 	<array>
39 | 		<string>UIInterfaceOrientationPortrait</string>
40 | 		<string>UIInterfaceOrientationPortraitUpsideDown</string>
41 | 		<string>UIInterfaceOrientationLandscapeLeft</string>
42 | 		<string>UIInterfaceOrientationLandscapeRight</string>
43 | 	</array>
44 | </dict>
45 | </plist>
46 | 


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/QHShowTextDemo/QHShowTextMan/QHTextConfig.swift:
--------------------------------------------------------------------------------
 1 | //
 2 | //  QHTextConfig.swift
 3 | //  QHShowTextDemo
 4 | //
 5 | //  Created by Anakin chen on 2018/7/10.
 6 | //  Copyright © 2018年 Chen Network Technology. All rights reserved.
 7 | //
 8 | 
 9 | import Foundation
10 | import UIKit
11 | 
12 | // 总配置
13 | struct QHTextConfig {
14 |     var id: Int = 0
15 |     var text: String
16 |     
17 |     var font: QHTextFontConfig = QHTextFontConfig()
18 |     var transition: QHTextTransitionConfig = QHTextTransitionConfig()
19 |     var animate: QHTextAnimateConfig = QHTextAnimateConfig()
20 |     
21 |     init(id: Int, text: String) {
22 |         self.id = id
23 |         self.text = text
24 |     }
25 | }
26 | 
27 | // 文本配置
28 | struct QHTextFontConfig {
29 |     var size: CGFloat = 0.0
30 |     var color: UIColor = UIColor.white
31 |     var font: UIFont?
32 |     var other: Any?
33 | }
34 | 
35 | // 转场配置
36 | struct QHTextTransitionConfig {
37 |     var type: QHTransitionType = .up
38 |     var interval: Double = 0
39 |     var scale: CGFloat = 1
40 |     var other: Any?
41 | }
42 | 
43 | // 动画配置
44 | struct QHTextAnimateConfig {
45 |     var type: QHTextAnimateType = .none
46 |     var interval: Double = 1
47 |     var other: Any?
48 |     var value: UIViewAnimationTransition = .none
49 |     var scale: CGFloat = 1
50 |     var animationTransition: UIViewAnimationTransition = .curlUp
51 | }
52 | 
53 | // 当前行的显示动画类型
54 | enum QHTextAnimateType: Int {
55 |     case none = 1
56 |     case typewriter // 打字机
57 |     case scale      // 缩放
58 |     case animationTransition //转场
59 | }
60 | 
61 | // 换行时的转场动画类型
62 | enum QHTransitionType: Int {
63 |     case up = 1
64 |     case upScale   // 缩放
65 |     case clockwise // 顺时针
66 |     case anticlockwise // 逆时针
67 | }
68 | 


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/QHShowTextDemo/QHShowTextMan/QHTextManager.swift:
--------------------------------------------------------------------------------
  1 | //
  2 | //  QHTextManager.swift
  3 | //  QHShowTextDemo
  4 | //
  5 | //  Created by Anakin chen on 2018/7/9.
  6 | //  Copyright © 2018年 Chen Network Technology. All rights reserved.
  7 | //
  8 | 
  9 | import UIKit
 10 | 
 11 | class QHTextManager: NSObject, QHTextViewDelegate {
 12 |     
 13 |     var view = UIView(frame: CGRect.zero)
 14 |     var data: [QHTextConfig]?
 15 |     
 16 |     var rotationSuperViewArray = [UIView]()
 17 |     var currentSuperViewIndex: Int = -1
 18 |     
 19 |     private func remove() {
 20 |         let frame = view.frame
 21 |         view.removeFromSuperview()
 22 |         view = UIView(frame: frame)
 23 |     }
 24 |     
 25 |     private func addRotationSuperView(data: [QHTextConfig]) {
 26 |         var superView = view
 27 |         for _ in 0..<data.count {
 28 |             let rotationSuperView = UIView(frame: superView.bounds)
 29 |             rotationSuperView.backgroundColor = UIColor.clear
 30 |             superView.addSubview(rotationSuperView)
 31 |             superView = rotationSuperView
 32 |             rotationSuperViewArray.append(superView)
 33 |         }
 34 |     }
 35 |     
 36 |     private func showText(currentTextView: QHTextView, nextText: QHTextConfig) {
 37 |         if let superView = currentTextView.superview {
 38 |             // TODO: 修改以 id 做索引，或者排序后再这样执行
 39 |             self.currentSuperViewIndex -= 1
 40 |             let nextSuperView = self.rotationSuperViewArray[self.currentSuperViewIndex]
 41 |             let nextTextView = QHTextView.create(text: nextText, superView: nextSuperView)
 42 |             nextTextView.delegate = self
 43 |             
 44 |             let currentSize = currentTextView.frame.size
 45 |             let nextSize = nextTextView.frame.size
 46 |             var frame = superView.frame
 47 |             var affineTransfrom: CGAffineTransform?
 48 |             
 49 |             switch nextText.transition.type {
 50 |             case .up:
 51 |                 let upHeight = currentSize.height + nextSize.height
 52 |                 frame.origin.y -= upHeight/2
 53 |                 frame.size.height += upHeight
 54 |             case .upScale:
 55 |                 let scale = nextText.transition.scale
 56 |                 let upHeight = currentSize.height * scale + nextSize.height
 57 |                 frame.origin.y -= upHeight/2
 58 |                 affineTransfrom = CGAffineTransform(scaleX: scale, y: scale)
 59 |             case .clockwise:
 60 |                 frame.origin.y -= (currentSize.width - nextSize.height)/2
 61 |                 frame.origin.x += (currentSize.height + nextSize.width)/2
 62 |                 affineTransfrom = CGAffineTransform(rotationAngle: CGFloat(Double.pi/2))
 63 |             case .anticlockwise:
 64 |                 frame.origin.y -= (currentSize.width - nextSize.height)/2
 65 |                 frame.origin.x -= (currentSize.height + nextSize.width)/2
 66 |                 affineTransfrom = CGAffineTransform(rotationAngle: CGFloat(-Double.pi/2))
 67 |             }
 68 |             
 69 |             UIView.animate(withDuration: nextText.transition.interval, animations: {
 70 |                 superView.frame = frame
 71 |                 if let affineT = affineTransfrom {
 72 |                     superView.transform = affineT
 73 |                 }
 74 |             }) { (bFinish) in
 75 |                 nextSuperView.addSubview(nextTextView)
 76 |                 nextTextView.show()
 77 |             }
 78 |         }
 79 |     }
 80 |     
 81 |     // MARK: Public
 82 |     
 83 |     class func create(superView: UIView) -> QHTextManager {
 84 |         let manager = QHTextManager()
 85 |         manager.view.frame = superView.bounds
 86 |         superView.addSubview(manager.view)
 87 |         
 88 |         return manager
 89 |     }
 90 |     
 91 |     func showIn(superView: UIView) {
 92 |         view.backgroundColor = UIColor.black
 93 |         view.frame = superView.bounds
 94 |         superView.addSubview(view)
 95 |     }
 96 |     
 97 |     func play(data: [QHTextConfig]) {
 98 |         self.data = data
 99 |         addRotationSuperView(data: data)
100 |         
101 |         if data.count > 0, let nextText = data.first {
102 |             currentSuperViewIndex = rotationSuperViewArray.count - 1
103 |             let nextSuperView = rotationSuperViewArray[currentSuperViewIndex]
104 |             let nextTextView = QHTextView.create(text: nextText, superView: nextSuperView)
105 |             nextTextView.delegate = self
106 |             nextSuperView.addSubview(nextTextView)
107 |             nextTextView.show()
108 |         }
109 |     }
110 |     
111 |     // MARK: QHTextViewDelegate
112 |     
113 |     func complete(view: QHTextView) {
114 |         let id = view.textId + 1
115 |         if let data = self.data, id <= data.count {
116 |             let nextText = data[id - 1]
117 |             showText(currentTextView: view, nextText: nextText)
118 |         }
119 |         else {
120 |             DispatchQueue.main.asyncAfter(deadline: .now() + 2, execute: {
121 |                 self.remove()
122 |             })
123 |         }
124 |         
125 |     }
126 | 
127 | }
128 | 


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/QHShowTextDemo/QHShowTextMan/QHTextTestConfig.swift:
--------------------------------------------------------------------------------
 1 | //
 2 | //  QHTextTestConfig.swift
 3 | //  QHShowTextDemo
 4 | //
 5 | //  Created by Anakin chen on 2018/7/11.
 6 | //  Copyright © 2018年 Chen Network Technology. All rights reserved.
 7 | //
 8 | 
 9 | import UIKit
10 | 
11 | class QHTextTestConfig: NSObject {
12 |     
13 |     private class func testTextStringArray() -> [String] {
14 |         let textString = "你碰上一个女孩。你不好意思。跟她表白。你怎么办。你问她。你说。你信不信。我能瞬间。环绕世界一周。她说不信。你围着她。你就绕一周。你就回来了。你说。你已经环绕了。世界一周。因为。你就是我的。全世界。"
15 |         let textStringArray = textString.components(separatedBy: "。")
16 |         
17 |         return textStringArray
18 |     }
19 |     
20 |     private class func textFontConfig() -> QHTextFontConfig {
21 |         var font = QHTextFontConfig()
22 |         font.size = (CGFloat(arc4random() % 32) + 18)
23 |         font.color = UIColor.white
24 |         return font
25 |     }
26 |     
27 |     private class func textTransitionConfig() -> QHTextTransitionConfig {
28 |         var transition = QHTextTransitionConfig()
29 |         transition.type = QHTransitionType(rawValue: (Int(arc4random() % 4) + 1))!
30 |         transition.interval = 0.4
31 |         if transition.type == .upScale {
32 |             transition.scale = 1.0 + (CGFloat(arc4random() % 6) + 1) * 0.1 * ((Int(arc4random() % 2) + 1) == 2 ? 1 : -1)
33 |         }
34 |         return transition
35 |     }
36 |     
37 |     private class func textAnimateConfig() -> QHTextAnimateConfig {
38 |         var animate = QHTextAnimateConfig()
39 |         animate.type = QHTextAnimateType(rawValue: (Int(arc4random() % 4) + 1))!
40 |         animate.interval = 1
41 |         if animate.type == .typewriter {
42 |             animate.interval = 0.2
43 |         }
44 |         else if animate.type == .scale {
45 |             animate.scale = 1.0 + (CGFloat(arc4random() % 9) + 1) * 0.1 * ((Int(arc4random() % 2) + 1) == 2 ? 1 : -1)
46 |         }
47 |         else if animate.type == .animationTransition {
48 |             animate.animationTransition = UIViewAnimationTransition(rawValue: (Int(arc4random() % 4) + 1))!
49 |         }
50 |         return animate
51 |     }
52 |     
53 |     class func testTextConfig() -> [QHTextConfig] {
54 |         
55 |         let textStringArray = testTextStringArray()
56 |         var textConfigData = [QHTextConfig]()
57 |         
58 |         var lastTransition: QHTransitionType = .up
59 |         
60 |         for textString in textStringArray {
61 |             let id = textConfigData.count + 1
62 |             var textConfig = QHTextConfig(id: id, text: textString)
63 |             
64 |             textConfig.font = textFontConfig()
65 |             textConfig.transition = textTransitionConfig()
66 |             textConfig.animate = textAnimateConfig()
67 |             
68 |             if lastTransition == .clockwise || lastTransition == .anticlockwise {
69 |                 if lastTransition == textConfig.transition.type {
70 |                     textConfig.transition.type = .up
71 |                 }
72 |             }
73 |             
74 |             if id == textStringArray.count {
75 |                 textConfig.transition.type = .up
76 |             }
77 |             
78 |             lastTransition = textConfig.transition.type
79 |             
80 |             textConfigData.append(textConfig)
81 |         }
82 |         
83 |         return textConfigData
84 |     }
85 | 
86 | }
87 | 


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/QHShowTextDemo/QHShowTextMan/QHTextView.swift:
--------------------------------------------------------------------------------
 1 | //
 2 | //  QHTextView.swift
 3 | //  QHShowTextDemo
 4 | //
 5 | //  Created by Anakin chen on 2018/7/9.
 6 | //  Copyright © 2018年 Chen Network Technology. All rights reserved.
 7 | //
 8 | 
 9 | import UIKit
10 | 
11 | protocol QHTextViewDelegate: NSObjectProtocol {
12 |     func complete(view: QHTextView)
13 | }
14 | 
15 | class QHTextView: UIView {
16 |     
17 |     var text = ""
18 |     var textId: Int = 0
19 |     var textConfig: QHTextConfig?
20 |     weak var delegate : QHTextViewDelegate?
21 | 
22 |     override func draw(_ rect: CGRect) {
23 |         if let context = UIGraphicsGetCurrentContext() {
24 |             context.clear(rect)
25 |         }
26 |         // 绘制文本属性
27 |         let textStyle = NSMutableParagraphStyle()
28 |         textStyle.alignment = .center
29 |         var textAttributes = [NSAttributedStringKey : Any]()
30 |         var fontSize: CGFloat = 10
31 |         if let textC = textConfig {
32 |             fontSize = textC.font.size
33 |         }
34 |         textAttributes[NSAttributedStringKey.font] = UIFont.systemFont(ofSize: fontSize)
35 |         textAttributes[NSAttributedStringKey.foregroundColor] = UIColor.white
36 |         textAttributes[NSAttributedStringKey.paragraphStyle] = textStyle
37 |         
38 |         let text = self.text
39 |         
40 |         let strSize = text.size(withAttributes: textAttributes)
41 |         // 文本绘制
42 |         let centerP = CGPoint(x: (rect.size.width - strSize.width)/2, y: (rect.size.height - strSize.height)/2)
43 |         text.draw(at: centerP, withAttributes: textAttributes)
44 |     }
45 |     
46 |     // MARK: Public
47 |     
48 |     class func create(text: QHTextConfig, superView: UIView) -> QHTextView {
49 |         let size = text.text.sizeFor(fontSize: text.font.size)
50 |         let textView = QHTextView(frame: CGRect(origin: .zero, size: size))
51 |         textView.center = superView.center
52 |         textView.backgroundColor = UIColor.clear
53 |         textView.textConfig = text
54 |         textView.textId = text.id
55 |         
56 |         return textView
57 |     }
58 |     
59 |     func show() {
60 |         if let textConfig = self.textConfig {
61 |             switch textConfig.animate.type {
62 |             case .none:
63 |                 none(textConfig: textConfig)
64 |             case .typewriter:
65 |                 typewriter(textConfig: textConfig)
66 |             case .scale:
67 |                 scale(textConfig: textConfig)
68 |             case .animationTransition:
69 |                 animationTransition(textConfig: textConfig)
70 |             }
71 |         }
72 |     }
73 | }
74 | 
75 | extension String {
76 |     func subString(to: Int) -> String {
77 |         let endIndex = String.Index.init(encodedOffset: to)
78 |         let subStr = self[self.startIndex..<endIndex]
79 |         return String(subStr)
80 |     }
81 |     
82 |     func sizeFor(fontSize: CGFloat) -> CGSize {
83 |         let font = UIFont.systemFont(ofSize: fontSize)
84 |         let size = NSString(string: self).size(withAttributes: [NSAttributedStringKey.font: font])
85 |         return size
86 |     }
87 | }
88 | 


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/QHShowTextDemo/QHShowTextMan/QHTextViewAnimate.swift:
--------------------------------------------------------------------------------
 1 | //
 2 | //  QHTextViewAnimate.swift
 3 | //  QHShowTextDemo
 4 | //
 5 | //  Created by Anakin chen on 2018/7/11.
 6 | //  Copyright © 2018年 Chen Network Technology. All rights reserved.
 7 | //
 8 | 
 9 | import Foundation
10 | import UIKit
11 | 
12 | extension QHTextView {
13 |     
14 |     func none(textConfig text: QHTextConfig) {
15 |         self.text = text.text
16 |         self.setNeedsDisplay()
17 |         
18 |         DispatchQueue.main.asyncAfter(deadline: .now() + text.animate.interval, execute: {
19 |             self.delegate?.complete(view: self)
20 |         })
21 |     }
22 |     
23 |     func typewriter(textConfig text: QHTextConfig) {
24 |         for i in 0..<text.text.count {
25 |             DispatchQueue.main.asyncAfter(deadline: .now() + text.animate.interval * Double(i)) {
26 |                 self.text = text.text.subString(to: i + 1)
27 |                 self.setNeedsDisplay()
28 |                 
29 |                 if (i + 1) == text.text.count {
30 |                     DispatchQueue.main.asyncAfter(deadline: .now() + text.animate.interval, execute: {
31 |                         self.delegate?.complete(view: self)
32 |                     })
33 |                 }
34 |             }
35 |         }
36 |     }
37 |     
38 |     func scale(textConfig text: QHTextConfig) {
39 |         self.text = text.text
40 |         self.setNeedsDisplay()
41 |         
42 |         self.transform = CGAffineTransform(scaleX: text.animate.scale, y: text.animate.scale)
43 |         UIView.animate(withDuration: text.animate.interval, animations: {
44 |             self.transform = CGAffineTransform.identity
45 |         }) { (bFinish) in
46 |             DispatchQueue.main.asyncAfter(deadline: .now() + text.animate.interval, execute: {
47 |                 self.delegate?.complete(view: self)
48 |             })
49 |         }
50 |     }
51 |     
52 |     func animationTransition(textConfig text: QHTextConfig) {
53 |         self.text = text.text
54 |         self.setNeedsDisplay()
55 |         
56 |         self.alpha = 0
57 |         DispatchQueue.main.asyncAfter(deadline: .now() + 0.2, execute: {
58 |             UIView.beginAnimations(nil, context: nil)
59 |             UIView.setAnimationDuration(text.animate.interval)
60 |             UIView.setAnimationTransition(.flipFromLeft, for: self, cache: true)
61 |             UIView.setAnimationCurve(.linear)
62 |             self.alpha = 1
63 |             UIView.commitAnimations()
64 |             
65 |             DispatchQueue.main.asyncAfter(deadline: .now() + text.animate.interval, execute: {
66 |                 self.delegate?.complete(view: self)
67 |             })
68 |         })
69 |     }
70 | }
71 | 


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/QHShowTextDemo/ViewController.swift:
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 1 | //
 2 | //  ViewController.swift
 3 | //  QHShowTextDemo
 4 | //
 5 | //  Created by Anakin chen on 2018/7/9.
 6 | //  Copyright © 2018年 Chen Network Technology. All rights reserved.
 7 | //
 8 | 
 9 | import UIKit
10 | 
11 | class ViewController: UIViewController {
12 |     
13 |     var textManager = QHTextManager()
14 | 
15 |     override func viewDidLoad() {
16 |         super.viewDidLoad()
17 |         // Do any additional setup after loading the view, typically from a nib.
18 |     }
19 | 
20 |     override func didReceiveMemoryWarning() {
21 |         super.didReceiveMemoryWarning()
22 |         // Dispose of any resources that can be recreated.
23 |     }
24 | 
25 |     @IBAction func showTextAction(_ sender: Any) {
26 |         textManager.showIn(superView: view)
27 |         textManager.play(data: QHTextTestConfig.testTextConfig())
28 |     }
29 | }
30 | 
31 | 


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/README.md:
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 1 | # QHShowTextDemo
 2 | 
 3 | QHShowTextMan 是使用 Swift 来实现在最近视频中，比较火的文字介绍的展现形式之一的视频。
 4 | 
 5 | QHShowTextMan 里面的 QHTextTestConfig 可以忽略，是展示的 Demo 配置，采用的是随机的数据。而正常使用，一般旋转之后有出现 四次 的向上，才会再次旋转，因为这样避免文字重叠。所以使用时请使用自己的文本配置来的展示。
 6 | 
 7 | 这里其实可以扩展成使用 xml 等文本来进行文本配置，再加入通过服务端下发的方式，从而动态起来。只是这里开源 动画和配置动画 的逻辑。
 8 | 
 9 | ![image](https://github.com/chenqihui/QHShowTextDemo/blob/master/screenshots/QHTextShowDemo.gif)
10 | 


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/screenshots/QHTextShowDemo.gif:
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https://raw.githubusercontent.com/chenqihui/QHShowTextDemo/ba9765ddcb19a974a520a54614317f978fbed2cc/screenshots/QHTextShowDemo.gif


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