ios手势操作总结
手势操作种类
手势操作的代理方法(uigesturerecognizerdelegate)
手势可能发生的条件，返回no可以阻止此手势的发生或者此手势不产生任何效果
- (bool)gesturerecognizershouldbegin:(uigesturerecognizer *)gesturerecognizer;
是否允许多个手势同时发生
- (bool)gesturerecognizer:(uigesturerecognizer *) gesturerecognizer shouldrecognizesimultaneouslywithgesturerecognizer: (uigesturerecognizer *)othergesturerecognizer;
uitapgesturerecognier敲击，点击手势
uitapgesturerecognizer *tap = [[uitapgesturerecognizer alloc] initwithtarget:self action:@selector(tap:)]; // 设置代理 tap.delegate = self; // 设置点击次数触发手势事件 tap.numberoftapsrequired = 1; // 设置需要点击的手指数 tap.numberoftouchesrequired = 1; [self.image addgesturerecognizer:tap];
uilongpressgesturerecongnizer长按
uilongpressgesturerecognizer *longpress = [[uilongpressgesturerecognizer alloc] initwithtarget:self action:@selector(longpress:)]; // 代理 longpress.delegate = self; // 设置最小间隔时间, 手指按下与离开间隔时间 longpress.minimumpressduration = 1.0; // 按下过程中允许移动的像素 longpress.allowablemovement = 30; [self.image addgesturerecognizer:longpress];
uipinchgesturerecognizer缩放手势
scale: 设置缩放比例，相对于原来大小
uipinchgesturerecognizer *pinch = [[uipinchgesturerecognizer alloc] initwithtarget:self action:@selector(pinch:)]; // 代理 pinch.delegate = self; // 设置缩放比例 pinch.scale = 1.2; [self.image addgesturerecognizer:pinch];
uirotationgesturerecognizer旋转手势
rotation: 旋转弧度，要保证每次都在上一次位置开始旋转，而不是回归初始位置，必须要在动作方法里将此值清零
我要评论
- (void)setuprotation
{
uirotationgesturerecognizer *rotation = [[uirotationgesturerecognizer alloc] initwithtarget:self action:@selector(rotation:)];
// 设置代理
rotation.delegate = self;
[self.image addgesturerecognizer:rotation];
}
- (void)rotation:(uirotationgesturerecognizer *)rotation
{
// 旋转角度
cgfloat radian = rotation.rotation;
self.image.transform = cgaffinetransformrotate(self.image.transform, radian);
// 复位，保证每次都是在上一次位置开始转，而不是每次都回归初始位置再转
rotation.rotation = 0;
}
uiswipegesturerecognizer轻扫, 手指按下然后在屏幕上滑动
轻扫分四个方向（上下左右），并且如果要在一个控件上同时添加一个以上的轻扫动作，必须对每个动作添加一个对象。也就是说每个方向的动作对应一个对象。
direction: 指定轻扫动作的方向
typedef ns_options(nsuinteger, uiswipegesturerecognizerdirection) {
uiswipegesturerecognizerdirectionright = 1 << 0, // 从左向右
uiswipegesturerecognizerdirectionleft = 1 << 1, // 从右向左
uiswipegesturerecognizerdirectionup = 1 << 2, // 从下往上
uiswipegesturerecognizerdirectiondown = 1 << 3 // 从上往下
};
uiswipegesturerecognizer *swipeup = [[uiswipegesturerecognizer alloc] initwithtarget:self action:@selector(swipe:)]; // 设置代理 swipeup.delegate = self; // 修改方向, 从下往上 swipeup.direction = uiswipegesturerecognizerdirectionup; [self.image addgesturerecognizer:swipeup]; // 添加其他方向手势 uiswipegesturerecognizer *swipedown = [[uiswipegesturerecognizer alloc] initwithtarget:self action:@selector(swipe:)]; // 修改方向, 从下往上 swipedown.direction = uiswipegesturerecognizerdirectiondown; [self.image addgesturerecognizer:swipedown];
uipangesturerecognizer拖拽，按下拖动控件操作
注意点：手势的触摸点locationinview和手势的移动点translationinview是不一样的，前者是用locationinview取得是指手指在当前控件中的坐标，后者表示相对于父view的rect
uipangesturerecognizer *pan = [[uipangesturerecognizer alloc] initwithtarget:self action:@selector(pan:)]; // 设置代理 pan.delegate = self; [self.image addgesturerecognizer:pan];
// 手势的触摸点 // cgpoint p = [pan locationinview:self.image]; // 手势的移动点(每次移动的位移点) cgpoint transp = [pan translationinview:self.image]; nslog(@"%f, %f", transp.x, transp.y); self.image.transform = cgaffinetransformtranslate(self.image.transform, transp.x, transp.y); // 复位 [pan settranslation:cgpointzero inview:self.image];
感谢阅读，希望能帮助到大家，谢谢大家对本站的支持！
如对本文有疑问，请在下面进行留言讨论，广大热心网友会与你互动！！ 点击进行留言回复
网友评论