ios 手势操作（ios手势操作设置方法）

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

1 2 3 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

1 2 3 4 5 6 7 8 9 // 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

1 2 3 4 5 6 7 8 9 // 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

1 2 3 4 5 6 7 8 9 // 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

1 2 3 4 5 6 7 8 9 10 11 12 13 14 // 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

1 2 3 4 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

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 // // 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 ()<uigesturerecognizerdelegate> @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

1 2 3 4 // 是否允许多手势操作，不是多触摸点 - (bool)gesturerecognizer:(uigesturerecognizer *)gesturerecognizer shouldrecognizesimultaneouslywithgesturerecognizer:(uigesturerecognizer *)othergesturerecognizer{ return yes; }

以上所述是小编给大家介绍的ios中各种手势操作实例代码,希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对服务器之家网站的支持！

原文链接：http://www.cnblogs.com/xgao/archive/2017/03/27/6626446.html