IOS 手势学习（点击，长按，轻扫，拖拽，旋转，捏合缩放）

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。