先看下效果
手势相关的介绍
IOS中手势操作一般是 UIGestureRecognizer 类的几个手势子类去实现，一般我们用到的手势就这么5种：
1、点击 UITapGestureRecognizer
2、平移 UIPanGestureRecognizer
3、缩放 UIPinchGestureRecognizer
4、旋转 UIRotationGestureRecognizer
5、轻扫 UISwipeGestureRecognizer
我们上面这个实例中就用到了上面这5种手势，不过其中 点击与轻扫没有体现出来，只是输出了下日志而已，一会看代码
下面我们来分别介绍下这几种手势
1、UITapGestureRecognizer 点击手势
UITapGestureRecognizer* tapGes = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(tapGes:)];// 点击次数，默认为1，1为单击，2为双击tapGes.numberOfTapsRequired = 2;
这个点击手势类有一个属性 numberOfTapsRequired 用于设置点击数，就是点击几次才触发这个事件
2、UIPanGestureRecognizer 平移手势
// 平移手势- (void)initPanGes{ UIPanGestureRecognizer* panGes = [[UIPanGestureRecognizer alloc]initWithTarget:self action:@selector(panGes:)]; [self.imgView addGestureRecognizer:panGes];}- (void)panGes:(UIPanGestureRecognizer*)ges{ // 获取平移的坐标点 CGPoint transPoint = [ges translationInView:self.imgView];} 平移手势本身没太多可设置的属性，在平移事件触发手，可以用 translationInView 方法获取当前平移坐标点
3、UIPinchGestureRecognizer 缩放手势
// 缩放手势- (void)initPinGes{ UIPinchGestureRecognizer* pinGes = [[UIPinchGestureRecognizer alloc]initWithTarget:self action:@selector(pinGes:)]; [self.imgView addGestureRecognizer:pinGes];}- (void)pinGes:(UIPinchGestureRecognizer*)ges{ // 缩放 self.imgView.transform = CGAffineTransformScale(self.imgView.transform, ges.scale, ges.scale);} 缩放手势在事件里面可以获取 scale 属性，表示当前缩放值
4、UIRotationGestureRecognizer 旋转手势
// 旋转手势- (void)initRotation{ UIRotationGestureRecognizer* rotationGes = [[UIRotationGestureRecognizer alloc]initWithTarget:self action:@selector(rotationGes:)]; [self.imgView addGestureRecognizer:rotationGes];}- (void)rotationGes:(UIRotationGestureRecognizer*)ges{ // 旋转图片 self.imgView.transform = CGAffineTransformRotate(self.imgView.transform, ges.rotation);} 旋转手势在事件里面可以通过获取 rotation 属性获取当前旋转的角度
5、UISwipeGestureRecognizer 轻扫手势
// 轻扫手势- (void)initSwipeGes{ // 创建 从右向左 轻扫的手势 UISwipeGestureRecognizer* swipeLeftGes = [[UISwipeGestureRecognizer alloc]initWithTarget:self action:@selector(swipeGes:)]; // 方向，默认是从左往右 // 最多只能开启一个手势，如果要开启多个就得创建多个手势 // 监听从右向左的方向 swipeLeftGes.direction = UISwipeGestureRecognizerDirectionLeft; [self.imgView addGestureRecognizer:swipeLeftGes];}- (void)swipeGes:(UISwipeGestureRecognizer*)ges{ // ges.direction方向值 NSLog(@"%s diection:%lu",__func__,(unsigned long)ges.direction);} 轻扫手势对象需要设置 direction 属性，默认是只监听从左向右，这是一个枚举值 UISwipeGestureRecognizerDirection
UISwipeGestureRecognizerDirectionRight 从左向右（默认值）
UISwipeGestureRecognizerDirectionLeft 从右向左
UISwipeGestureRecognizerDirectionUp 从下向上
UISwipeGestureRecognizerDirectionDown 从上向下
下面看一下我们上面那个效果图实现代码吧
//// ViewController.m// 各种手势操作//// Created by xgao on 16/3/24.// Copyright © 2016年 xgao. All rights reserved.//#import "ViewController.h"@interface ViewController ()@property (weak, nonatomic) IBOutlet UIImageView *imgView;@end@implementation ViewController- (void)viewDidLoad { [super viewDidLoad]; [self initTapGes]; [self initPanGes]; [self initPinGes]; [self initRotation]; [self initSwipeGes];}// 点击手势- (void)initTapGes{ UITapGestureRecognizer* tapGes = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(tapGes:)]; // 点击次数，默认为1，1为单击，2为双击 tapGes.numberOfTapsRequired = 2; tapGes.delegate = self; [self.imgView addGestureRecognizer:tapGes];}- (void)tapGes:(UITapGestureRecognizer*)ges{ NSLog(@"%s",__func__);}// 平移手势- (void)initPanGes{ UIPanGestureRecognizer* panGes = [[UIPanGestureRecognizer alloc]initWithTarget:self action:@selector(panGes:)]; panGes.delegate = self; [self.imgView addGestureRecognizer:panGes];}- (void)panGes:(UIPanGestureRecognizer*)ges{ // 获取平移的坐标点 CGPoint transPoint = [ges translationInView:self.imgView]; // 在之前的基础上移动图片 self.imgView.transform = CGAffineTransformTranslate(self.imgView.transform, transPoint.x, transPoint.y); // 复原，必需复原 // 每次都清空一下消除坐标叠加 [ges setTranslation:CGPointZero inView:self.imgView]; NSLog(@"%s",__func__);}// 缩放手势- (void)initPinGes{ UIPinchGestureRecognizer* pinGes = [[UIPinchGestureRecognizer alloc]initWithTarget:self action:@selector(pinGes:)]; pinGes.delegate = self; [self.imgView addGestureRecognizer:pinGes];}- (void)pinGes:(UIPinchGestureRecognizer*)ges{ // 缩放 self.imgView.transform = CGAffineTransformScale(self.imgView.transform, ges.scale, ges.scale); // 复原 // 每次都清空一下消除叠加 ges.scale = 1;}// 旋转手势- (void)initRotation{ UIRotationGestureRecognizer* rotationGes = [[UIRotationGestureRecognizer alloc]initWithTarget:self action:@selector(rotationGes:)]; rotationGes.delegate = self; [self.imgView addGestureRecognizer:rotationGes];}- (void)rotationGes:(UIRotationGestureRecognizer*)ges{ // 旋转图片 self.imgView.transform = CGAffineTransformRotate(self.imgView.transform, ges.rotation); // 复原 // 每次都清空一下消除叠加 ges.rotation = 0; NSLog(@"%s",__func__);}// 轻扫手势- (void)initSwipeGes{ // 创建 从右向左 轻扫的手势 UISwipeGestureRecognizer* swipeLeftGes = [[UISwipeGestureRecognizer alloc]initWithTarget:self action:@selector(swipeGes:)]; // 方向，默认是从左往右 // 最多只能开启一个手势，如果要开启多个就得创建多个手势 // 监听从右向左的方向 swipeLeftGes.direction = UISwipeGestureRecognizerDirectionLeft; swipeLeftGes.delegate = self; [self.imgView addGestureRecognizer:swipeLeftGes]; // 创建 从下向上 轻扫的手势 UISwipeGestureRecognizer* swipeUpGes = [[UISwipeGestureRecognizer alloc]initWithTarget:self action:@selector(swipeGes:)]; // 监听从下向上的方向 swipeUpGes.direction = UISwipeGestureRecognizerDirectionUp; swipeUpGes.delegate = self; [self.imgView addGestureRecognizer:swipeUpGes];}- (void)swipeGes:(UISwipeGestureRecognizer*)ges{ // ges.direction方向值 NSLog(@"%s diection:%lu",__func__,(unsigned long)ges.direction);}#pragma mark - UIGestureRecognizerDelegate// 判断是否能触发手势- (BOOL)gestureRecognizerShouldBegin:(UITapGestureRecognizer *)gestureRecognizer{ return YES;}// 是否允许多手势操作，不是多触摸点- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer{ return YES;}@end
这里需要注意的有两点：
1、对于 平移、缩放、旋转 这3个手势，我们如果要用它的值去处理的话，要记得复原！复原！复原！这点很重要！重要的事说3遍～～
平移手势里面我们需要设置 setTranslation:CGPointZero 来复原它的坐标值，不然下一次事件触发这个坐标值会叠加
缩放手势里面设置 ges.scale = 1 来复原它的缩放值 旋转手势里面设置 ges.rotation = 0 来复原它的角度值2、假如我们需要多手势一起用的时候就需要设置下delegate 里面的一个返回参数的方法了
// 是否允许多手势操作，不是多触摸点- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer{ return YES;} 这次分享就到这里～～有什么不清楚的，就留言吧 ^_^