ios 开发之swift中手势的实例详解
手势操作主要包括如下几类
| 手势 | 属性 | 说明 |
|---|---|---|
| 点击 uitapgesturerecognizer | numberoftapsrequired：点击的次数；numberoftouchesrequired：点击时有手指数量 | 设置属性 numberoftapsrequired 可以实现单击，或双击的效果 |
| 滑动 uiswipegesturerecognizer | direction：滑动方向 | direction 滑动方向分为上up、下down、左left、右right |
| 拖动 uipangesturerecognizer | 在拖动过程中，通过方法 translationinview 获取拖动时的位移 | |
| 长按 uilongpressgesturerecognizer | minimumpressduration：长按最少时间 | |
| 旋转 uirotationgesturerecognizer | ||
| 缩放 uipinchgesturerecognizer |
注意：手势效果在实施过程中，存在几种状态：
* began
* ended
* cancelled
* failed
* possible
手势效果图
代码示例
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// 点击
let label = uilabel(frame: cgrectmake(10.0, 10.0, (self.view.frame.size.width - 10.0 * 2), 60.0))
self.view.addsubview(label)
label.backgroundcolor = uicolor.lightgraycolor()
label.text = "手势操作-单指单击手势";
label.adjustsfontsizetofitwidth = true
label.textalignment = .center;
// 添加手势
let taprecognizer = uitapgesturerecognizer(target: self, action: selector("tapclick:"))
taprecognizer.numberoftapsrequired = 1
taprecognizer.numberoftouchesrequired = 1
label.userinteractionenabled = true
label.addgesturerecognizer(taprecognizer)
// 手势响应方法
func tapclick(recognizer:uitapgesturerecognizer)
{
let label:uilabel = recognizer.view as! uilabel
label.textcolor = uicolor.redcolor()
}
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// 滑动
let label = uilabel(frame: cgrectmake(10.0, 10.0, (self.view.frame.size.width - 10.0 * 2), 60.0))
self.view.addsubview(label)
label.backgroundcolor = uicolor.lightgraycolor()
label.text = "手势操作-左滑手势";
label.adjustsfontsizetofitwidth = true
label.textalignment = .center;
// 添加手势
let swipeleftrecognizer = uiswipegesturerecognizer(target: self, action: selector("swipeleftclick:"))
swipeleftrecognizer.direction = .left
swipeleftrecognizer.numberoftouchesrequired = 1
label.userinteractionenabled = true
label.addgesturerecognizer(swipeleftrecognizer)
// 手势响应方法
func swipeleftclick(recognizer:uiswipegesturerecognizer)
{
let label = recognizer.view
label!.backgroundcolor = uicolor.orangecolor()
}
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// 拖动
let label = uilabel(frame: cgrectmake(10.0, 10.0, 100.0, 100.0))
self.view.addsubview(label)
label.backgroundcolor = uicolor.lightgraycolor()
label.text = "手势操作-拖动手势";
label.adjustsfontsizetofitwidth = true
label.textalignment = .center;
// 添加手势
let panrecognizer = uipangesturerecognizer(target: self, action: selector("panclick:"))
label.userinteractionenabled = true
label.addgesturerecognizer(panrecognizer)
var pointvalue:cgpoint! = cgpointzero // 移动
// 手势响应方法
func panclick(recognizer:uipangesturerecognizer)
{
let label:uilabel = recognizer.view as! uilabel
let point = recognizer.translationinview(label)
print("pan point = \\(point)")
// 移动
label.transform = cgaffinetransformmaketranslation(point.x + self.pointvalue.x, point.y + self.pointvalue.y)
if recognizer.state == .began
{
label.backgroundcolor = uicolor.yellowcolor()
self.view.bringsubviewtofront(label)
}
else if recognizer.state == .ended
{
label.backgroundcolor = uicolor.lightgraycolor()
self.pointvalue.x += point.x
self.pointvalue.y += point.y
}
}
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// 缩放
let label = uilabel(frame: cgrectmake(10.0, 10.0, 200.0, 200.0))
self.view.addsubview(label)
label.backgroundcolor = uicolor.lightgraycolor()
label.text = "手势操作-捏合手势";
label.adjustsfontsizetofitwidth = true
label.textalignment = .center;
// 添加手势
let pinchrecognizer = uipinchgesturerecognizer(target: self, action: selector("pinchclick:"))
label.userinteractionenabled = true
label.addgesturerecognizer(pinchrecognizer)
// 手势响应方法
var scalevalue:cgfloat! = 1.0 // 缩放
func pinchclick(recognizer:uipinchgesturerecognizer)
{
let label:uilabel = recognizer.view as! uilabel
let scale = recognizer.scale;
if scale > 1.0
{
// 放大
label.transform = cgaffinetransformmakescale(self.scalevalue + scale - 1.0, self.scalevalue + scale - 1.0)
}
else
{
// 缩小
label.transform = cgaffinetransformmakescale(self.scalevalue * scale, self.scalevalue * scale)
}
if recognizer.state == .began
{
label.backgroundcolor = uicolor.greencolor()
self.view.bringsubviewtofront(label)
}
else if recognizer.state == .ended
{
label.backgroundcolor = uicolor.lightgraycolor()
if scale > 1.0
{
self.scalevalue = self.scalevalue + scale - 1.0;
}
else
{
self.scalevalue = self.scalevalue * scale
}
}
}
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// 旋转
let label = uilabel(frame: cgrectmake(10.0, 10.0, 200.0, 200.0))
self.view.addsubview(label)
label.backgroundcolor = uicolor.lightgraycolor()
label.text = "手势操作-旋转手势";
label.adjustsfontsizetofitwidth = true
label.textalignment = .center;
// 添加手势
let rotationrecognizer = uirotationgesturerecognizer(target: self, action: selector("ratotionclick:"))
label.userinteractionenabled = true
label.addgesturerecognizer(rotationrecognizer)
var rotationvalue:cgfloat! = 1.0 // 旋转
// 手势响应方法
func ratotionclick(recognizer:uirotationgesturerecognizer)
{
let label:uilabel = recognizer.view as! uilabel
let rotation = recognizer.rotation
label.transform = cgaffinetransformmakerotation(rotation + self.rotationvalue)
if recognizer.state == .began
{
label.backgroundcolor = uicolor.greencolor()
self.view.bringsubviewtofront(label)
}
else if recognizer.state == .ended
{
label.backgroundcolor = uicolor.lightgraycolor()
self.rotationvalue = self.rotationvalue + rotation
}
}
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// 长按
let label = uilabel(frame: cgrectmake(10.0, 10.0, (self.view.frame.size.width - 10.0 * 2), 60.0))
self.view.addsubview(label)
label.backgroundcolor = uicolor.lightgraycolor()
label.text = "手势操作-长按手势";
label.adjustsfontsizetofitwidth = true
label.textalignment = .center;
// 添加手势
let pressrecognizer = uilongpressgesturerecognizer(target: self, action: selector("pressclick:"))
pressrecognizer.minimumpressduration = 3.0
label.userinteractionenabled = true
label.addgesturerecognizer(pressrecognizer)
// 手势响应方法
func pressclick(recognizer:uilongpressgesturerecognizer)
{
let label:uilabel = recognizer.view as! uilabel
if recognizer.state == .began
{
let alertview = uialertview(title: nil, message: "长按响应", delegate: nil, cancelbuttontitle: "知道了")
alertview.show()
label.backgroundcolor = uicolor.orangecolor()
self.view.bringsubviewtofront(label)
}
else if recognizer.state == .ended
{
label.backgroundcolor = uicolor.lightgraycolor()
}
}
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