我正在尝试快速裁剪图像。我正在尝试实现类似的东西，用户将拍摄照片。捕获照片后，将允许用户设置裁剪区域。我能够从该裁剪区域获取图像，但我希望裁剪图像的大小应调整为特定的宽度和高度。也就是说，如果特定的高度或宽度较小，则应调整其大小。
该图像应该是其最大宽度和高度的框架。目前它只是增加了其他领域的透明度。
我还添加了我的裁剪代码
let tempLayer = CAShapeLayer()
tempLayer.frame = self.view.frame
let path = UIBezierPath()
var endPoint: CGPoint!
for (var i = 0; i<4; i++){
let tag = 101+i
let pointView = viewCrop.viewWithTag(tag)
switch (pointView!.tag){
case 101:
endPoint = CGPointMake(pointView!.center.x-20, pointView!.center.y-20)
path.moveToPoint(endPoint)
default:
path.addLineToPoint(CGPointMake(pointView!.center.x-20, pointView!.center.y-20))
}
}
path.addLineToPoint(endPoint)
path.closePath()
tempLayer.path = path.CGPath
tempLayer.fillColor = UIColor.whiteColor().CGColor
tempLayer.backgroundColor = UIColor.clearColor().CGColor
imgReceiptView.layer.mask = tempLayer
UIGraphicsBeginImageContextWithOptions(viewCrop.bounds.size, imgReceiptView.opaque, 0.0);
imgReceiptView.layer.renderInContext(UIGraphicsGetCurrentContext())
let cropImg = UIGraphicsGetImageFromCurrentImageContext()
UIGraphicsEndImageContext();
UIImageWriteToSavedPhotosAlbum(cropImg, nil, nil, nil)
imgReceiptView.hidden = true
let tempImageView = UIImageView(frame: CGRectMake(20,self.view.center.y-80, self.view.frame.width-40,160))
tempImageView.backgroundColor = UIColor.grayColor()
tempImageView.image = cropImg
tempImageView.tag = 1001
tempImageView.layer.masksToBounds = true
self.view.addSubview(tempImageView)任何帮助都将是可观的
提前致谢