IOS開發之UI手勢

1. 點擊手勢和雙擊手勢

2. 
   

3. 
   

4. #import "TapViewController.h"

5. 
   

6. @interface TapViewController ()

7. 
   

8. @end

9. 
   

10. @implementation TapViewController

11. 
    

12. - (void)viewDidLoad {

13.     [super viewDidLoad];

14.     // Do any additional setup after loading the view.

15.     

16.     //點擊手勢:

17.      //=================單擊===========

18.     //1.建立一個點擊手勢對象

19.     //UIGestureRecognizer是全部手勢的父類，通常不會直接使用哪一個它

20.     //而是使用它的子類

21.     //參數1:響應手勢的對象;

22.     //參數2:響應的消息

23.     //功能:發生點擊動做，對象去響應這個手勢

24.     UITapGestureRecognizer *tapGesture = [[UITapGestureRecognizer

25.                                            alloc]initWithTarget:self action:@selector(tapGesture:)];

26.     

27.     //2.添加手勢到指定的視圖上(任何手勢均可以添加到任何繼承自UIView的類的對象上)

28.     

29.     [self.view addGestureRecognizer:tapGesture];

30.     

31.     

32.     //=================雙擊===========

33.     

34.     //1.建立點擊對象

35.     UITapGestureRecognizer *doubleTap = [[UITapGestureRecognizer alloc]

36.                                          initWithTarget:self action:@selector(doubleTap:)];

37.     

38.     //2.設置點擊次數

39.     doubleTap.numberOfTapsRequired = 2;

40.     

41.     

42.     //4.忽略其餘手勢

43.     //單擊的時候忽略雙擊;

44.     [tapGesture requireGestureRecognizerToFail:doubleTap];

45.     

46.     //3.將手勢添加到指定的視圖控制器上

47.     [self.view addGestureRecognizer:doubleTap];

48.     

49.     

50. }

51. 
    

52. #pragma mark -單擊手勢響應

53. - (void)tapGesture:(UITapGestureRecognizer *)tap{

54.     //獲取點擊手勢的座標

55.     

56.     CGPoint point = [tap locationInView:self.view];

57.     

58.     // NSLog(@"%@",NSStringFromCGPoint(point));

59.     

60.     NSLog(@"單擊");

61. }

62. 
    

63. 
    

64. 
    

65. #pragma mark - 雙擊事件響應

66. - (void)doubleTap:(UIGestureRecognizer *)doubleTap{

67.     

68.     //獲取點擊手勢的座標

69.     

70.     CGPoint point = [doubleTap locationInView:self.view];

71.     

72.     //NSLog(@"%@",NSStringFromCGPoint(point));

73.     

74.     NSLog(@"雙擊");

75. }

76. 
    

77. 
    

    
    

78. @end

---

長按手勢:關鍵在於設置手勢的時間

#import "LongPressViewController.h"

@interface LongPressViewController ()

@end

@implementation LongPressViewController

- (void)viewDidLoad {

    [super viewDidLoad];

    

    //1.建立長按手勢對象

    UILongPressGestureRecognizer *longPress = [[UILongPressGestureRecognizer alloc]initWithTarget:self action:@selector(longPress:)];

    

    //3.設置長按時間

    longPress.minimumPressDuration = 1;

    

    //2.將手勢添加到視圖控制器上;

    [self.view addGestureRecognizer:longPress];

    

    

}

#pragma mark -響應長按手勢

//這個方法在手勢的狀態發生改變的時候調用

- (void)longPress : (UILongPressGestureRecognizer *)longPress{

    

    //手勢的狀態:(針對全部的手勢都適用)

//UIGestureRecognizerStateBegan:手勢開始

//UIGestureRecognizerStateChanged:手勢改變

//UIGestureRecognizerStateEnded:手勢結束

    //longPress setState:<#(UIGestureRecognizerState)#>

    if (longPress.state == UIGestureRecognizerStateBegan) {

        NSLog(@"長按");

    }

    

    

    

    

    

  //  NSLog(@"長按");

    

    

}

@end

---

滑動手勢：關鍵在於設置滑動的方向

#import "SwipeViewController.h"

@interface SwipeViewController ()

@end

@implementation SwipeViewController

- (void)viewDidLoad {

    [super viewDidLoad];

    

    //1.建立滑動手勢對象

    UISwipeGestureRecognizer *swip = [[UISwipeGestureRecognizer alloc]

                                      initWithTarget:self action:@selector(swipGesture:)];

   //3.滑動方向

    //注意:若是想要能夠兩個方向均可以，滑動方向必須添加一個右劃的手勢

    

    [swip setDirection:UISwipeGestureRecognizerDirectionLeft];

    

    //2.將手勢添加到視圖控制器上

    [self.view addGestureRecognizer:swip];

    //=============右劃默認是從左向右滑動==========

    UISwipeGestureRecognizer *swipRight = [[UISwipeGestureRecognizer alloc]

                                           initWithTarget:self action:@selector(swipGesture:)];

   // [swip setDirection:UISwipeGestureRecognizerDirectionRight];

    [self.view addGestureRecognizer:swipRight];

    

    

   

    

    

    

}

#pragma mark - 滑動手勢響應事件

- (void)swipGesture:(UISwipeGestureRecognizer *)swipGesture{

    if (swipGesture.direction == UISwipeGestureRecognizerDirectionRight) {

        

        NSLog(@"右滑回到下一頁");

    }else{

    NSLog(@"左滑到上一頁");

    }

}

@end

---

拖動手勢

#import "PanViewController.h"

@interface PanViewController ()

@end

@implementation PanViewController

- (void)viewDidLoad {

    [super viewDidLoad];

    

    //1.建立拖動手勢對象

    UIPanGestureRecognizer *panGesture = [[UIPanGestureRecognizer alloc]

                                          initWithTarget:self action:@selector(pan:)];

    

    

    //2.添加到視圖

    [self.imageView addGestureRecognizer:panGesture];

    

}

//這個方法會在拖動過程當中時時調用;

#pragma mark - 拖動手勢方法

- (void)pan:(UIPanGestureRecognizer *)pan{

    self.imageView.center = [pan locationInView:self.view];

    

    NSLog(@"拖動");

    

}

@end

---

旋轉手勢：

#import "RotationViewController.h"

@interface RotationViewController ()

@end

@implementation RotationViewController

- (void)viewDidLoad {

    [super viewDidLoad];

    // Do any additional setup after loading the view.

    

    //1.建立旋轉手勢對象

    

    UIRotationGestureRecognizer *rotatioin = [[UIRotationGestureRecognizer alloc]

                                              initWithTarget:self action:@selector(rotationG:)];

    //2.添加到視圖上

    [self.imageView addGestureRecognizer:rotatioin];

    

}

#pragma mark - 旋轉手勢事件

- (void) rotationG:(UIRotationGestureRecognizer *)ro{

    static CGFloat lastRotation = 0;

   //® self.imageView.center = [rotation locationInView:self.view];

    

    CGFloat triangle = ro.rotation + lastRotation;

    

    self.imageView.transform = CGAffineTransformMakeRotation(triangle);

    

    if (ro.state == UIGestureRecognizerStateEnded) {

        

        lastRotation = ro.rotation + lastRotation;

        

    }

    

    NSLog(@"旋轉");

    

    

    

}

@end

---

縮放手勢

#import "PinchViewController.h"

@interface PinchViewController ()

@end

@implementation PinchViewController

- (void)viewDidLoad {

    [super viewDidLoad];

    // Do any additional setup after loading the view.

    //1.建立pinch手勢對象

   UIPinchGestureRecognizer *pinch = [[UIPinchGestureRecognizer alloc]

                                      initWithTarget:self action:@selector(pinchGesture:)];

    

    //2.添加到視圖上

    [self.view addGestureRecognizer:pinch];

    

    

}

- (void)pinchGesture:(UIPinchGestureRecognizer *)pinch{

    

    static CGFloat lastScale =1;

    

    CGFloat scale = pinch.scale;

    //3.經過手勢的縮放比例去改變圖片的縮放形變;

    

    [self.imageView setTransform:CGAffineTransformMakeScale(scale, scale)];

    

    if (pinch.state == UIGestureRecognizerStateEnded) {

        

        lastScale = pinch.scale * lastScale;

    }

    

    

    NSLog(@"縮放");

    

}

@end