IOS 开发之swift中UIView的扩展使用的实例

IOS 开发之swift中UIView的扩展使用的实例

扩展类代码：

import UIKit 

extension UIView
{
  // MARK : 坐标尺寸 

  var origin:CGPoint {
    get {
      return self.frame.origin
    }
    set(newValue) {
      var rect = self.frame
      rect.origin = newValue
      self.frame = rect
    }
  } 

  var size:CGSize {
    get {
      return self.frame.size
    }
    set(newValue) {
      var rect = self.frame
      rect.size = newValue
      self.frame = rect
    }
  } 

  var left:CGFloat {
    get {
      return self.frame.origin.x
    }
    set(newValue) {
      var rect = self.frame
      rect.origin.x = newValue
      self.frame = rect
    }
  } 

  var top:CGFloat {
    get {
      return self.frame.origin.y
    }
    set(newValue) {
      var rect = self.frame
      rect.origin.y = newValue
      self.frame = rect
    }
  } 

  var right:CGFloat {
    get {
      return (self.frame.origin.x + self.frame.size.width)
    }
    set(newValue) {
      var rect = self.frame
      rect.origin.x = (newValue - self.frame.size.width)
      self.frame = rect
    }
  } 

  var bottom:CGFloat {
    get {
      return (self.frame.origin.y + self.frame.size.height)
    }
    set(newValue) {
      var rect = self.frame
      rect.origin.y = (newValue - self.frame.size.height)
      self.frame = rect
    }
  } 

  // MARK: - 位移 

  // 移动到指定中心点位置
  func moveToPoint(point:CGPoint) -> Void
  {
    var center = self.center
    center.x = point.x
    center.y = point.y
    self.center = center
  } 

  // 缩放到指定大小
  func scaleToSize(scale:CGFloat) -> Void
  {
    var rect = self.frame
    rect.size.width *= scale
    rect.size.height *= scale
    self.frame = rect
  } 

  // MARK: - 毛玻璃效果 

  // 毛玻璃
  func effectViewWithAlpha(alpha:CGFloat) -> Void
  {
    let effect = UIBlurEffect.init(style: UIBlurEffectStyle.Light)
    let effectView = UIVisualEffectView.init(effect: effect)
    effectView.frame = self.bounds
    effectView.alpha = alpha 

    self.addSubview(effectView)
  } 

  // MARK: - 边框属性 

  // 圆角边框设置
  func layer(radius radius:CGFloat, borderWidth:CGFloat, borderColor:UIColor) -> Void
  {
    if (0.0 < radius)
    {
      self.layer.cornerRadius = radius
      self.layer.masksToBounds = true
      self.clipsToBounds = true
    } 

    if (0.0 < borderWidth)
    {
      self.layer.borderColor = borderColor.CGColor
      self.layer.borderWidth = borderWidth
    }
  } 

  // MARK: - 翻转 

  // 旋转 旋转180度 M_PI
  func viewTransformWithRotation(rotation:CGFloat) -> Void
  {
    self.transform = CGAffineTransformMakeRotation(rotation);
  } 

  // 缩放
  func viewScaleWithSize(size:CGFloat) -> Void
  {
    self.transform = CGAffineTransformScale(self.transform, size, size);
  } 

  // 水平，或垂直翻转
  func viewFlip(isHorizontal:Bool) -> Void
  {
    if (isHorizontal)
    {
      // 水平
      self.transform = CGAffineTransformScale(self.transform, -1.0, 1.0);
    }
    else
    {
      // 垂直
      self.transform = CGAffineTransformScale(self.transform, 1.0, -1.0);
    }
  }
}

使用效果图：

使用示例：

let imageView = UIImageView.init(frame: CGRectMake(10.0, 10.0, 60.0, 60.0))
self.view.addSubview(imageView) 

imageView.image = UIImage(named: "header") 

imageView.backgroundColor = UIColor.colorRandom() 

imageView.left = 100.0
imageView.top = 100.0
imageView.size = CGSizeMake(100.0, 100.0) 

imageView.moveToPoint(CGPointMake(100.0, 100.0))
imageView.scaleToSize(2.0) 

imageView.effectViewWithAlpha(0.6) 

imageView.layer(radius: 3.0, borderWidth: 1.0, borderColor: UIColor.redColor()) 

imageView.viewFlip(false) 

imageView.viewTransformWithRotation(5.0)

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