IOS中的七种手势小结

今天为大家介绍一下ios 的七种手势，手势在开发中经常用到，所以就简单 通俗易懂的说下， 话不多说，直接看代码：

// 初始化一个uiimageview
uiimageview *imageview = [[uiimageview alloc]initwithframe:cgrectmake(100, 100, 300, 300)];
imageview.image = [uiimage imagenamed:@"12.jpg"];
// uiimageview的用户交互是默认关闭的，要想使他可以处理触摸事件，我们得手动打开它
[imageview setuserinteractionenabled:yes];
[self.window addsubview:imageview];
//初始化一个视图（响应者）来承载手势
/*uiview *gestureview = [[uiview alloc] initwithframe:cgrectmake(100, 100, 100, 100)];
//当前视图放置到屏幕*
gestureview.center = self.window.center;
gestureview.backgroundcolor = [uicolor yellowcolor];
[self.window addsubview:gestureview];

1、轻拍手势

//创建轻拍手势
uitapgesturerecognizer *tapgr = [[uitapgesturerecognizer alloc] initwithtarget:self action:@selector(tapaction:)];

1.设置触控对象，和轻拍的次数

//设置触控对象的个数（几个手指）
[tapgr setnumberoftouchesrequired:1];
//设置轻拍次数
[tapgr setnumberoftapsrequired:2];
//给创建好的视图添加手势
[gestureview addgesturerecognizer:tapgr];
//轻拍手势的回调方法
- (void)tapaction:(uitapgesturerecognizer*)sender{
//可以根据手势得到它当前所作用的视图
uiimageview *imageview = (uiimageview*)sender.view;
//得到textfield viewwithtag此方法的返回值为uiview类型，但是uitextfield为uiview的子类，父类对象不能直接指向子类对象，所以需要强制转换
uitextfield *textfield = (uitextfield*)[self.window viewwithtag:1000];
//回收键盘，取消第一响应者
[textfield resignfirstresponder];
nslog(@"我轻拍了gestureview");
}

2、捏合手势

//创建捏合手势
uipinchgesturerecognizer* pinchgr = [[uipinchgesturerecognizer alloc] initwithtarget:self action:@selector(pinchaction:)];
pinchgr.delegate = self; // 可以在同一个视图上实现多个手势
//捏合手势的回调方法
- (void)pinchaction:(uipinchgesturerecognizer*)sender{
//通过捏合手势的到缩放比率
float scale = sender.scale;
//得到该手势所作用的视图
uiview *view = sender.view;
//2d仿射变换函数中的缩放函数来实现视图的放大缩小
//是在原有基础上来改变当前的视图
//函数的第一个参数：现有的视图的transform值
//第二个参数：x轴上的缩放比率
//第三个参数:y轴上的缩放比率
//是在视图最初的transform状态上改变，不管执行多少次，都是以该视图最初的transform状态为基础来改变
view.transform = cgaffinetransformmakescale(2, 2);
view.transform = cgaffinetransformscale(view.transform, scale, scale);
//每次捏合动作完毕之后，让此捏合值复原，使得它每次都是从100%开始缩放
sender.scale = 1;
}

3、旋转手势

//旋转手势
uirotationgesturerecognizer* rotagr = [[uirotationgesturerecognizer alloc] initwithtarget:self action:@selector(rotaaction:)];
rotagr.delegate = self;
//旋转手势回调方法
- (void)rotaaction:(uirotationgesturerecognizer*)sender{
//通过手势的到旋转角度
float rota = sender.rotation;
//得到该手势作用的视图
uiview *view = sender.view;
//通过2d仿射变换函数中的旋转函数来使得当前视图旋转。
view.transform = cgaffinetransformrotate(view.transform, rota);
//复原
sender.rotation = 0;
}

4、平移手势

//平移手势
uipangesturerecognizer *pangp = [[uipangesturerecognizer alloc] initwithtarget:self action:@selector(panaction:)];
//平移手势的回调方法
- (void)panaction:(uipangesturerecognizer*)sender{
//得到当前手势所在视图
uiview *view = sender.view;
//得到我们在视图上移动的偏移量
cgpoint currentpoint = [sender translationinview:view.superview];
//通过2d仿射变换函数中与位移有关的函数实现视图位置变化
view.transform = cgaffinetransformtranslate(view.transform, currentpoint.x, currentpoint.y);
//复原 // 每次都是从00点开始
[sender settranslation:cgpointzero inview:view.superview];
}

5、边缘轻扫手势

//边缘轻扫手势
uiscreenedgepangesturerecognizer *edgepangr = [[uiscreenedgepangesturerecognizer alloc] initwithtarget:self action:@selector(edgepanaction:)];
edgepangr.edges = uirectedgeall;
//边缘轻扫手势回调方法
- (void)edgepanaction:(uiscreenedgepangesturerecognizer*)sender{
nslog(@"我成功的触发了屏幕边缘手势");
}

6、长按手势

// ⑥长按手势
uilongpressgesturerecognizer *longpresspr = [[uilongpressgesturerecognizer alloc]initwithtarget:self action:@selector(longpressaction:)];
longpresspr.minimumpressduration = 1;
// ⑥长按手势的回调方法
- (void)longpressaction:(uilongpressgesturerecognizer *)sender{
if (sender.state == uigesturerecognizerstateended) {
uialertview *alertview = [[uialertview alloc] initwithtitle:@"看你麻痹" message:@"不服你咬死我" delegate:self cancelbuttontitle:@"取消" otherbuttontitles:@"确定", nil];
[alertview show];
}
}

7、轻扫手势

// ⑦轻扫手势
uiswipegesturerecognizer *swipegr = [[uiswipegesturerecognizer alloc]initwithtarget:self action:@selector(swipeaction:)];
// ⑦轻扫手势的回调方法
- (void)swipeaction:(uiswipegesturerecognizer *)sender{
if (sender.state == uigesturerecognizerstateended) {
uiactionsheet *actionsheet = [[uiactionsheet alloc]initwithtitle:@"槽尼玛" delegate:self cancelbuttontitle:@"纸张" destructivebuttontitle:@"哈哈哈" otherbuttontitles:@"切毛毛", nil];
[actionsheet showinview:self.window];
}
}

给imageview视图添加手势

// 3.给图片添加手势 一个视图可以添加多种手势，但是一个手势，只能添加到一个视图上
[imageview addgesturerecognizer:tapgr];
[imageview addgesturerecognizer:pinchgr];
[imageview addgesturerecognizer:rotagr];
[imageview addgesturerecognizer:pangr];
[imageview addgesturerecognizer:edgepangr];
[imageview addgesturerecognizer:longpresspr];
[imageview addgesturerecognizer:swipegr];

当一个视图上想要添加多种手势的时候就要用到手势的代理(重点)

pragma mark ----手势的代理方法
// 使得多个手势可以同时响应
- (bool)gesturerecognizer:(uigesturerecognizer *)gesturerecognizer shouldrecognizesimultaneouslywithgesturerecognizer:(uigesturerecognizer *)othergesturerecognizer{
// 返回值为yes的时候，当执行一个手势的操作的时候，也可以执行其他手势的操作
return yes;
}

以上所述是小编给大家介绍的ios中的七种手势小结，希望对大家有所帮助