iOS手势的实现方法

本文实例为大家分享了iOS手势的具体实现代码，供大家参考，具体内容如下

效果

细节

1.UITouch

#import "ViewController_0.h"

@interface ViewController_0 ()

@property (nonatomic, strong)UILabel *label;

@end

@implementation ViewController_0

- (void)viewDidLoad {

  [super viewDidLoad];

  self.label          = [[UILabel alloc] initWithFrame:CGRectMake(100, 100, 100, 100)];
  self.label.backgroundColor  = [UIColor yellowColor];
  self.label.layer.borderWidth = 1;
  [self.view addSubview:self.label];

  UILabel *textlabel = [[UILabel alloc] initWithFrame:CGRectMake(10, 80, 200, 45)];
  textlabel.text   = @"拖动方块";
  [textlabel sizeToFit];
  textlabel.font   = [UIFont systemFontOfSize:12];
  [self.view addSubview:textlabel];
}

- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(nullable UIEvent *)event {

  //1.拿到手势
  UITouch *touch = [touches anyObject];

  //2.拿到touch 所在view的坐标
  CGPoint point = [touch locationInView:self.view];

  //3.让label拿到坐标
  self.label.center = point;

  NSLog(@"1.手指接触到了屏幕");
}

- (void)touchesMoved:(NSSet<UITouch *> *)touches withEvent:(nullable UIEvent *)event {

  //1.拿到手势
  UITouch *touch = [touches anyObject];

  //2.拿到touch 所在view的坐标
  CGPoint point = [touch locationInView:self.view];

  //3.让label拿到坐标
  self.label.center = point;

  NSLog(@"2.手指在屏幕上移动");
}

- (void)touchesEnded:(NSSet<UITouch *> *)touches withEvent:(nullable UIEvent *)event {

   NSLog(@"3.手指刚离开屏幕");
}

- (void)touchesCancelled:(NSSet<UITouch *> *)touches withEvent:(nullable UIEvent *)event {

  NSLog(@"4.手势失效了");
}

@end

2.UITapGestureRecognizer

#import "ViewController_1.h"

@interface ViewController_1 ()

@property (nonatomic, strong) UILabel *label;

@end

@implementation ViewController_1

- (void)viewDidLoad {

  [super viewDidLoad];

  UILabel *textlabel = [[UILabel alloc] initWithFrame:CGRectMake(10, 80, 200, 45)];
  textlabel.text   = @"电脑上操作tap手势 alt +shift 需要连续点击次数2次";
  [textlabel sizeToFit];
  textlabel.font   = [UIFont systemFontOfSize:12];
  [self.view addSubview:textlabel];

  self.label            = [[UILabel alloc] initWithFrame:CGRectMake(100, 150, 100, 100)];
  self.label.backgroundColor    = [UIColor orangeColor];
  self.label.userInteractionEnabled = YES;
  self.label.text          = @"0";
  self.label.textAlignment     = NSTextAlignmentCenter;
  [self.view addSubview:self.label];

  // 1.创建tap手势
  UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(labelTap:)];
  tap.numberOfTapsRequired  = 2; //需要轻轻点击的次数
  tap.numberOfTouchesRequired = 2;//需要的手指数量 ：2根手指alt +shift 需要匹配点击次数2次（其实直接用默认的就好）
  [self.label addGestureRecognizer:tap];
}

- (void)labelTap:(UITapGestureRecognizer *)tap {

  int num = [self.label.text intValue];
  num++;
  self.label.text = [NSString stringWithFormat:@"%d",num ];
}

@end

3.UILongPressGestureRecognizer

#import "ViewController_2.h"

@interface ViewController_2 () <UIGestureRecognizerDelegate>

@property (nonatomic, strong) UILabel *label;

@end

@implementation ViewController_2

- (void)viewDidLoad {

  [super viewDidLoad];

  UILabel *textlabel = [[UILabel alloc] initWithFrame:CGRectMake(10, 80, 200, 45)];
  textlabel.text   = @"long长按手势";
  [textlabel sizeToFit];
  textlabel.font   = [UIFont systemFontOfSize:12];
  [self.view addSubview:textlabel];

  self.label            = [[UILabel alloc] initWithFrame:CGRectMake(40, 150, 200, 150)];
  self.label.backgroundColor    = [UIColor grayColor];
  self.label.userInteractionEnabled = YES;
  self.label.text          = @"0";
  self.label.textAlignment     = NSTextAlignmentCenter;
  [self.view addSubview:self.label];

  UILongPressGestureRecognizer *longPress = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(longPressAction:)];
  longPress.numberOfTapsRequired     = 1;
  longPress.numberOfTouchesRequired    = 1;
  longPress.minimumPressDuration     = 1.0;
  longPress.delegate  = self;
  [self.label addGestureRecognizer:longPress];
}

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

  if(longPress.state == UIGestureRecognizerStateBegan) {

    NSLog(@"手势状态开始");

  } else if(longPress.state == UIGestureRecognizerStateEnded) {

    NSLog(@"手势状态结束");

  } else if(longPress.state == UIGestureRecognizerStateChanged) {

    NSLog(@"手势状态改变");

    NSInteger num = [self.label.text integerValue];
    num ++;
    self.label.text = [NSString stringWithFormat:@"%ld",(long)num];
  }
}

@end

4.UISwipeGestureRecognizer

#import "ViewController_3.h"

@interface ViewController_3 ()

@property (nonatomic, strong) UILabel *label;

@end

@implementation ViewController_3

- (void)viewDidLoad {

  [super viewDidLoad];

  UILabel *textlabel   = [[UILabel alloc] initWithFrame:CGRectMake(10, 80, 200, 45)];
  textlabel.text     = @"swipe手势 向右滑动➕1,你也可以设置左划上划下划";
  textlabel.numberOfLines = 0;
  textlabel.font     = [UIFont systemFontOfSize:12];
  [self.view addSubview:textlabel];

  self.label            = [[UILabel alloc] initWithFrame:CGRectMake(100, 150, 100, 100)];
  self.label.backgroundColor    = [UIColor grayColor];
  self.label.userInteractionEnabled = YES;
  self.label.text          = @"0";
  self.label.textAlignment     = NSTextAlignmentCenter;
  [self.view addSubview:self.label];

  UISwipeGestureRecognizer *swipeGesture = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(swipeAction:)];
  swipeGesture.direction         = UISwipeGestureRecognizerDirectionRight;//默认就是向右划
  [self.label addGestureRecognizer:swipeGesture];
}

-(void)swipeAction:(UISwipeGestureRecognizer *)swipe {

  if (swipe.direction == UISwipeGestureRecognizerDirectionLeft) {

    NSLog(@"现在响应左划手势");

  } else if (swipe.direction == UISwipeGestureRecognizerDirectionRight) {

    NSLog(@"现在响应右划手势");

    NSInteger num  = [self.label.text integerValue];
    num ++;
    self.label.text = [NSString stringWithFormat:@"%ld",(long)num];

  } else if (swipe.direction == UISwipeGestureRecognizerDirectionUp) {

    NSLog(@"现在响应上划手势");

  } else if (swipe.direction == UISwipeGestureRecognizerDirectionDown) {

    NSLog(@"现在响应下划手势");
  }
}

@end

5.UIPanGestureRecognizer

#import "ViewController_4.h"

@interface ViewController_4 ()

@property (nonatomic, strong) UILabel *label;

@end

@implementation ViewController_4

- (void)viewDidLoad {

  [super viewDidLoad];

  UILabel *textlabel = [[UILabel alloc] initWithFrame:CGRectMake(10, 80, 200, 45)];
  textlabel.text   = @"pan手势,拖动方块";
  [textlabel sizeToFit];
  textlabel.font   = [UIFont systemFontOfSize:12];
  [self.view addSubview:textlabel];

  self.label            = [[UILabel alloc] initWithFrame:CGRectMake(100, 100, 100, 100)];
  self.label.backgroundColor    = [UIColor grayColor];
  self.label.userInteractionEnabled = YES;
  self.label.text          = @"0";
  self.label.textAlignment     = NSTextAlignmentCenter;
  [self.view addSubview:self.label];

  UIPanGestureRecognizer *pan = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(panAction:)];
  [self.label addGestureRecognizer:pan];
}

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

  CGPoint offset  = [pan locationInView:self.view];
  self.label.center = offset;
}

@end

6.UIRotationGestureRecognizer

#import "ViewController_5.h"

@interface ViewController_5 ()

@property (nonatomic, strong) UILabel *label;

@end

@implementation ViewController_5

- (void)viewDidLoad {

  [super viewDidLoad];

  UILabel *textlabel = [[UILabel alloc] initWithFrame:CGRectMake(10, 80, 200, 45)];
  textlabel.text   = @"模拟器测试旋转手势时，按住 option键，再用触摸板或鼠标操作";
  textlabel.font   = [UIFont systemFontOfSize:12];
  textlabel.numberOfLines = 0;
  [self.view addSubview:textlabel];

  self.label            = [[UILabel alloc] initWithFrame:CGRectMake(40, 200, 200, 50)];
  self.label.backgroundColor    = [UIColor grayColor];
  self.label.userInteractionEnabled = YES;
  self.label.text          = @"we are friends";
  self.label.textAlignment     = NSTextAlignmentCenter;
  [self.view addSubview:self.label];

  //（模拟器测试捏合和旋转手势时，按住 option 键，再用触摸板或鼠标操作）
  UIRotationGestureRecognizer *rotation = [[UIRotationGestureRecognizer alloc] initWithTarget:self action:@selector(rotationAction:)];
  [self.view addGestureRecognizer:rotation];

}

- (void)rotationAction:(UIRotationGestureRecognizer *)rotation {

  self.label.transform = CGAffineTransformRotate(self.label.transform, rotation.rotation);
  rotation.rotation = 0; // 这个很重要!!!!!

//  static float orginState;
//
//  self.label.transform = CGAffineTransformMakeRotation(rotation.rotation + orginState);
//
//  if (rotation.state == UIGestureRecognizerStateEnded) {
//
//    orginState = orginState + rotation.state;
//    self.label.transform = CGAffineTransformMakeRotation(rotation.rotation);
//  }
}

@end

7.UIPinchGestureRecognizer

#import "ViewController_6.h"

@interface ViewController_6 ()

@property (nonatomic, strong) UILabel *label;

@end

@implementation ViewController_6

- (void)viewDidLoad {

  [super viewDidLoad];

  UILabel *textlabel = [[UILabel alloc] initWithFrame:CGRectMake(10, 80, 200, 45)];
  textlabel.text   = @"模拟器测试捏合手势时，按住 option键，再用触摸板或鼠标操作";
  textlabel.font   = [UIFont systemFontOfSize:12];
  textlabel.numberOfLines = 0;
  [self.view addSubview:textlabel];

  self.label            = [[UILabel alloc] initWithFrame:CGRectMake(100, 250, 80, 80)];
  self.label.backgroundColor    = [UIColor grayColor];
  self.label.userInteractionEnabled = YES;
  self.label.text          = @"0";
  self.label.textAlignment     = NSTextAlignmentCenter;
  [self.view addSubview:self.label];

//  （模拟器测试捏合和旋转手势时，按住 option 键，再用触摸板或鼠标操作）
  UIPinchGestureRecognizer * pinch = [[UIPinchGestureRecognizer alloc]initWithTarget:self action:@selector(pichGesture:)];
  [self.view addGestureRecognizer:pinch];
}

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

  static float originScale = 1;

  //手势缩放返回的scale 是相对于上一次的
  self.label.transform = CGAffineTransformMakeScale(pinch.scale * originScale , pinch.scale*originScale);

  if (pinch.state == UIGestureRecognizerStateEnded) {

    originScale = originScale * pinch.scale;
  }
}

@end

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