如何清除ImageView?
问题描述:
我知道如何在平移时清除imageView,但是当我这样做时清除了锐利边缘的图像,但是我想要的是在使用Swift3在iOS上对ImageView进行平移时,使用柔和/平滑边缘清除ImageView?希望我清楚我的问题。如何清除ImageView?
//For clearing the imageView I use this method.
func draw(fromPoint:CGPoint,toPoint:CGPoint) {
if draw {
UIGraphicsBeginImageContext(self.viewBelowScrollView.bounds.size)// ??
let context = UIGraphicsGetCurrentContext()
frontImageView.image?.draw(in: self.viewBelowScrollView.bounds)
context?.setLineCap(CGLineCap.round)
context?.setLineWidth(CGFloat(sizeSliderOutlet.value))
context?.move(to: CGPoint(x: fromPoint.x, y: fromPoint.y))
context?.addLine(to: CGPoint(x: toPoint.x, y: toPoint.y))
context?.setBlendMode(CGBlendMode.clear)
//Setting the Line Configuration
context?.strokePath()
//Setting all the things done on the Image View Now.
frontImageView.image = UIGraphicsGetImageFromCurrentImageContext()
UIGraphicsEndImageContext()
}
}
//任何帮助将不胜感激。先谢谢你。
谢谢你的回复,我的ImageView的clipToBound属性已设置为TRUE。来自财产督察。如果您能为我提供相同的演示项目,我将非常高兴。 –