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)

如有疑问请留言或者到本站社区交流讨论，感谢阅读，希望能帮助到大家，谢谢大家对本的支持！