首先新建一個基于Sigle view Application的項目，名為GestureTest;我的項目結構如下：

往viewController.xib文件里拖動一個imageView,并使覆蓋整個屏幕，改動屬性為：

viewController.h文件：

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[cpp]viewplaincopy

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1.?????#import?<UIKit/UIKit.h>??

2.???????

3.?????@interface?ViewController?:?UIViewController{??

4.?????????IBOutlet?UIImageView?*imageView;??

5.?????}??

6.?????@property?(nonatomic,retain)IBOutlet?UIImageView?*imageView;??

7.?????@end??

并使xib文件里的imageView與之連接；

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然后是viewController.m文件的實現部分：

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[cpp]viewplaincopy

?

1.?????@synthesize?imageView;??

2.???????

3.?????CGFloat?lastScaleFactor=1;//放大、縮小??

4.?????CGFloat??netRotation;//旋轉??

5.?????CGPoint?netTranslation;//平衡??

6.?????NSArray?*images;//圖片數組??

7.?????int?imageIndex=0;//數組下標??

8.???????

9.?????-?(void)viewDidLoad??

10.???{??

11.???????//1、創建手勢實例，并連接方法handleTapGesture,點擊手勢??

12.???????UITapGestureRecognizer?*tapGesture=[[UITapGestureRecognizer?alloc]initWithTarget:self?action:@selector(handleTapGesture:)];??

13.???????//設置手勢點擊數,雙擊：點2下??

14.???????tapGesture.numberOfTapsRequired=2;??

15.???????//?imageView添加手勢識別??

16.???????[imageView?addGestureRecognizer:tapGesture];??

17.???????//釋放內存??

18.???????[tapGesture?release];??

19.?????????

20.???????//2、手勢為捏的姿勢:按住option按鈕配合鼠標來做這個動作在虛擬器上??

21.???????UIPinchGestureRecognizer?*pinchGesture=[[UIPinchGestureRecognizer?alloc]initWithTarget:self?action:@selector(handlePinchGesture:)];??

22.???????[imageView?addGestureRecognizer:pinchGesture];//imageView添加手勢識別??

23.???????[pinchGesture?release];??

24.?????????

25.???????//3、旋轉手勢:按住option按鈕配合鼠標來做這個動作在虛擬器上??

26.???????UIRotationGestureRecognizer?*rotateGesture=[[UIRotationGestureRecognizer?alloc]initWithTarget:self?action:@selector(handleRotateGesture:)];??

27.???????[imageView?addGestureRecognizer:rotateGesture];??

28.???????[rotateGesture?release];??

29.?????????

30.???????//4、拖手勢??

31.???????UIPanGestureRecognizer?*panGesture=[[UIPanGestureRecognizer?alloc]initWithTarget:self?action:@selector(handlePanGesture:)];??

32.??????//?[imageView?addGestureRecognizer:panGesture];??

33.???????[panGesture?release];??

34.?????????

35.???????//5、劃動手勢??

36.???????images=[[NSArray?alloc]initWithObjects:@"cell.jpg",@"heihua.jpg",@"xuanyi.jpg",?nil];??

37.???????//右劃??

38.???????UISwipeGestureRecognizer?*swipeGesture=[[UISwipeGestureRecognizer?alloc]initWithTarget:self?action:@selector(handleSwipeGesture:)];??

39.???????[imageView?addGestureRecognizer:swipeGesture];??

40.???????[swipeGesture?release];??

41.???????//左劃??

42.???????UISwipeGestureRecognizer?*swipeLeftGesture=[[UISwipeGestureRecognizer?alloc]initWithTarget:self?action:@selector(handleSwipeGesture:)];??

43.???????swipeGesture.direction=UISwipeGestureRecognizerDirectionLeft;//不設置黑夜是右??

44.???????[imageView?addGestureRecognizer:swipeLeftGesture];??

45.???????[swipeLeftGesture?release];??

46.?????????

47.???????//6、長按手勢??

48.???????UILongPressGestureRecognizer?*longpressGesutre=[[UILongPressGestureRecognizer?alloc]initWithTarget:self?action:@selector(handleLongpressGesture:)];??

49.???????//長按時間為1秒??

50.???????longpressGesutre.minimumPressDuration=1;??

51.???????//允許15秒中運動??

52.???????longpressGesutre.allowableMovement=15;??

53.???????//所需觸摸1次??

54.???????longpressGesutre.numberOfTouchesRequired=1;??

55.???????[imageView?addGestureRecognizer:longpressGesutre];??

56.???????[longpressGesutre?release];??

57.?????????

58.???????[super?viewDidLoad];??

59.???????//?Do?any?additional?setup?after?loading?the?view,?typically?from?a?nib.??

60.???}??

61.???//雙擊屏幕時會調用此方法,放大和縮小圖片??

62.???-(IBAction)handleTapGesture:(UIGestureRecognizer*)sender{??

63.???????//判斷imageView的內容模式是否是UIViewContentModeScaleAspectFit,該模式是原比例，按照圖片原時比例顯示大小??

64.???????if(sender.view.contentMode==UIViewContentModeScaleAspectFit){??

65.???????????//把imageView模式改成UIViewContentModeCenter，按照圖片原先的大小顯示中心的一部分在imageView??

66.???????????sender.view.contentMode=UIViewContentModeCenter;??

67.???????}else{??

68.???????????sender.view.contentMode=UIViewContentModeScaleAspectFit;??

69.???????}??

70.???}??

71.???//捏的手勢，使圖片放大和縮小，捏的動作是一個連續的動作??

72.???-(IBAction)handlePinchGesture:(UIGestureRecognizer*)sender{??

73.???????//得到sender捏手勢的大小??

74.???????CGFloat?factor=[(UIPinchGestureRecognizer*)sender?scale];??

75.???????if(factor>1){??

76.???????????//圖片放大??

77.???????????sender.view.transform=CGAffineTransformMakeScale(lastScaleFactor+(factor-1),?(lastScaleFactor+(factor-1)));??

78.??????????????????????????????????????????????????????????????

79.???????}else{??

80.???????????//縮小??

81.???????????sender.view.transform=CGAffineTransformMakeScale(lastScaleFactor*factor,?lastScaleFactor*factor);??

82.??????????????????????????????????????????????????????????????

83.???????}??

84.???????//狀態是否結束，如果結束保存數據??

85.???????if(sender.state==UIGestureRecognizerStateEnded){??

86.???????????if(factor>1){??

87.???????????????lastScaleFactor+=(factor-1);??

88.???????????}else{??

89.???????????????lastScaleFactor*=factor;??

90.???????????}??

91.???????}??

92.???}??

93.???//旋轉手勢??

94.???-(IBAction)handleRotateGesture:(UIGestureRecognizer*)sender{??

95.???????//浮點類型，得到sender的旋轉度數??

96.???????CGFloat?rotation=[(UIRotationGestureRecognizer*)sender?rotation];??

97.???????//旋轉角度CGAffineTransformMakeRotation??

98.???????CGAffineTransform?transform=CGAffineTransformMakeRotation(rotation+netRotation);??

99.???????//改變圖像角度??

100.? ????sender.view.transform=transform;??

101.? ????//狀態結束，保存數據??

102.? ????if(sender.state==UIGestureRecognizerStateEnded){??

103.? ????????netRotation+=rotation;??

104.? ????}??

105.? ???????

106.? }??

107.? //拖手勢??

108.? -(IBAction)handlePanGesture:(UIGestureRecognizer*)sender{??

109.? ????//得到拖的過程中的xy坐標??

110.? ????CGPoint?translation=[(UIPanGestureRecognizer*)sender?translationInView:imageView];??

111.? ????//平移圖片CGAffineTransformMakeTranslation??

112.? ????sender.view.transform=CGAffineTransformMakeTranslation(netTranslation.x+translation.x,?netTranslation.y+translation.y);??

113.? ????//狀態結束，保存數據??

114.? ????if(sender.state==UIGestureRecognizerStateEnded){??

115.? ????????netTranslation.x+=translation.x;??

116.? ????????netTranslation.y+=translation.y;??

117.? ????}??

118.? ??????

119.? }??

120.? //劃動手勢??

121.? -(IBAction)handleSwipeGesture:(UIGestureRecognizer*)sender{??

122.? ????//劃動的方向??

123.? ????UISwipeGestureRecognizerDirection?direction=[(UISwipeGestureRecognizer*)?sender?direction];??

124.? ????//判斷是上下左右??

125.? ????switch?(direction)?{??

126.? ????????case?UISwipeGestureRecognizerDirectionUp:??

127.? ????????????NSLog(@"up");??

128.? ????????????break;??

129.? ????????case?UISwipeGestureRecognizerDirectionDown:??

130.? ????????????NSLog(@"down");??

131.? ????????????break;??

132.? ????????case?UISwipeGestureRecognizerDirectionLeft:??

133.? ????????????NSLog(@"left");??

134.? ????????????imageIndex++;//下標++??

135.? ????????????break;??

136.? ????????case?UISwipeGestureRecognizerDirectionRight:??

137.? ????????????NSLog(@"right");??

138.? ????????????imageIndex--;//下標--??

139.? ????????????break;??

140.? ????????default:??

141.? ????????????break;??

142.? ????}??

143.? ????//得到不越界不<0的下標??

144.? ????imageIndex=(imageIndex<0)?([images?count]-1):imageIndex%[images?count];??

145.? ????//imageView顯示圖片??

146.? ????imageView.image=[UIImage?imageNamed:[images?objectAtIndex:imageIndex]];??

147.? ??????

148.? }??

149.? //長按手勢??

150.? -(IBAction)handleLongpressGesture:(UIGestureRecognizer*)sender{??

151.? ????//創建警告??

152.? ????UIActionSheet?*actionSheet=[[UIActionSheet?alloc]initWithTitle:@"Image?options"?delegate:self?cancelButtonTitle:nil?destructiveButtonTitle:nil?otherButtonTitles:@"Save?Image",@"Copy",?nil];??

153.? ????//當前view顯示警告??

154.? ????[actionSheet?showInView:self.view];??

155.? ????[actionSheet?release];??

156.? }??

157.? -(void)dealloc{??

158.? ????[images?release];??

159.? ????[imageView?release];??

160.? ????[super?dealloc];??

161.? } ?

總結

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