IOS 手势学习（点击，长按，轻扫，拖拽，旋转，捏合缩放）

点击        UITapGestureRecognizer

长按        UILongPressGestureRecognizer

轻扫        UISwipeGestureRecognizer

拖拽        UIPanGestureRecognizer

旋转        UIRotationGestureRecognizer

捏合缩放 UIPinchGestureRecognizer



详细代码如下：


#import "ViewController.h"

@interface ViewController () <UIGestureRecognizerDelegate>
{
    UIView * _view;
}
@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    
    //创建视图
    _view=[[UIView alloc]initWithFrame:CGRectMake(0, 0, 200, 200)];
    _view.backgroundColor=[UIColor blueColor];
    _view.center=self.view.center;
    [self.view addSubview:_view];
    
    
//点击
    UITapGestureRecognizer * tap=[[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(tapClick)];
    
    //当前需要点击次数
    tap.numberOfTapsRequired=2;
    //[tap setNumberOfTapsRequired:2];    //同上
    
    //设置当前出发时间需要的手指数
    tap.numberOfTouchesRequired=2;   // option键  模拟手指
    //[tap setNumberOfTouchesRequired:2];   //同上
    
    [_view addGestureRecognizer:tap];
    
//长按
    UILongPressGestureRecognizer * longPress=[[UILongPressGestureRecognizer alloc]initWithTarget:self action:@selector(longPressClick)];
    
    //在长按过程中移动10个单位也算长按
    longPress.allowableMovement=10;
    //[longPress setAllowableMovement:10];     //同上
    
    //长按的最短时间
    longPress.minimumPressDuration=2;
    [_view addGestureRecognizer:longPress];
    
    
    
//轻扫
    UISwipeGestureRecognizer * swipe=[[UISwipeGestureRecognizer alloc]initWithTarget:self action:@selector(swipeAction)];
    
    //往右边的方向 ——>
    swipe.direction=UISwipeGestureRecognizerDirectionRight;
    [_view addGestureRecognizer:swipe];
   
    
//轻扫
    UISwipeGestureRecognizer * swipe2=[[UISwipeGestureRecognizer alloc]initWithTarget:self action:@selector(swipeAction2)];
    
    //往左边的方向 <——
    swipe2.direction=UISwipeGestureRecognizerDirectionLeft;
    [_view addGestureRecognizer:swipe2];
    
//轻扫
    UISwipeGestureRecognizer * swipe3=[[UISwipeGestureRecognizer alloc]initWithTarget:self action:@selector(swipeAction3)];
    
    //往上边的方向 ??
    swipe3.direction=UISwipeGestureRecognizerDirectionUp;
    [_view addGestureRecognizer:swipe3];
    
    
//轻扫
    UISwipeGestureRecognizer * swipe4=[[UISwipeGestureRecognizer alloc]initWithTarget:self action:@selector(swipeAction4)];
    
    //往下边的方向 ??
    swipe4.direction=UISwipeGestureRecognizerDirectionDown;
    [_view addGestureRecognizer:swipe4];
    
//拖拽
    UIPanGestureRecognizer * pan=[[UIPanGestureRecognizer alloc]initWithTarget:self action:@selector(panAction:)];
    
    [_view addGestureRecognizer:pan];
    
    
//旋转
    UIRotationGestureRecognizer * rotation=[[UIRotationGestureRecognizer alloc]initWithTarget:self action:@selector(rotation:)];
    rotation.delegate=self;
    [_view addGestureRecognizer:rotation];
    
    
//捏合缩放
    UIPinchGestureRecognizer * pinch=[[UIPinchGestureRecognizer alloc]initWithTarget:self action:@selector(pinch:)];
    pinch.delegate=self;
    [_view addGestureRecognizer:pinch];
   
}


#pragma mark - 点击
- (void) tapClick
{
    NSLog(@"点击");
}
#pragma mark - 长按
- (void)longPressClick
{
    NSLog(@"长按");
}

#pragma mark - 向右滑
- (void) swipeAction
{
    NSLog(@"right");
}
#pragma mark - 向左滑
- (void) swipeAction2
{
    NSLog(@"left");
}
#pragma mark - 向上滑
- (void) swipeAction3
{
    NSLog(@"up");
}
#pragma mark - 向下滑
- (void) swipeAction4
{
    NSLog(@"down");
}

#pragma mark - 拖拽移动
- (void) panAction:(UIPanGestureRecognizer *) pan
{
    //获取移动的大小
    CGPoint point=[pan translationInView:pan.view];
    
    //更改视图的中心点坐标
    CGPoint points=_view.center;
    points.x+=point.x;
    points.y+=point.y;
    _view.center=points;
    
    //每次都清空一下，消除坐标叠加
    [pan setTranslation:CGPointZero inView:pan.view];
}

#pragma mark - 旋转
- (void) rotation:(UIRotationGestureRecognizer *) rote
{
    //获取当前旋转的度数
    CGFloat rotation=rote.rotation;
    
    //通过仿射变换实现旋转
    _view.transform=CGAffineTransformRotate(_view.transform, rotation);
    //防止旋转叠加，清零
    rote.rotation=0;
    
}

#pragma mark - 缩放捏合
- (void) pinch:(UIPinchGestureRecognizer *) pinch
{
    //获取比例
    CGFloat scale=pinch.scale;
    
    //通过仿射变换实现缩放
    _view.transform=CGAffineTransformScale(_view.transform, scale, scale);
    
    //防止比例叠加
    pinch.scale=1;
    
    
}

#pragma mark - 代理方法实现旋转 + 缩放捏合 可同时进行
- (BOOL) gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer
{
    return YES;
}


- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

@end



需要注意点：

                    1.键盘上的option键模拟手指


             2.对同一个view来说，拖拽时，向左向右向上向下的手势失效。

标签： isp ssd 代码

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