目前,我可以保存顶部图像的照片,但是顶部图像并不位于预览 View 中出现在屏幕上时的坐标。
fileprivate func mergeUIViews( ) -> UIImage?
{
let bottomImage = photo
let topImage = uiViewInstance.image
let bottomImageHeight = bottomImage.size.height
let bottomImageWidth = bottomImage.size.width
let topImageHeight = uiViewInstance.frame.height
let topImageWidth = uiViewInstance.frame.width
let topImageOrigin = uiViewInstance.frame.origin
let bottomImageSize = CGSize(width: bottomImageWidth, height: bottomImageHeight)
let topImageSize = CGSize(width: topImageWidth, height: topImageHeight)
// Merge images
UIGraphicsBeginImageContextWithOptions(bottomImageSize, false, 0.0)
bottomImage.draw(in: CGRect(origin: CGPoint.zero, size: bottomImageSize))
topImage .draw(in: CGRect(origin: topImageOrigin, size: topImageSize)) // Where I believe the problem exists
let newImage = UIGraphicsGetImageFromCurrentImageContext()
UIGraphicsEndImageContext()
return newImage
}
最佳答案
有效的方法不是使用实际捕获的照片的大小,而是将照片大小设置为 View Controller 的 View 大小。这导致了整个屏幕的所需输出,显示合并的照片以及覆盖图像的原点的正确点。
fileprivate func mergeUIViews( ) -> UIImage?
{
let bottomImage = photo
let topImage = uiViewInstance.image
let bottomImageSize = self.view.frame.size
let topImageHeight = uiViewInstance.frame.height
let topImageWidth = uiViewInstance.frame.width
let topImageOrigin = uiViewInstance.frame.origin
let topImageSize = uiViewInstance.frame.size
// Merge images
UIGraphicsBeginImageContextWithOptions(bottomImageSize, false, 0.0)
bottomImage.draw(in: CGRect(origin: CGPoint.zero, size: bottomImageSize))
topImage .draw(in: CGRect(origin: topImageOrigin, size: topImageSize)) // Where I believe the problem exists
let newImage = UIGraphicsGetImageFromCurrentImageContext()
UIGraphicsEndImageContext()
return newImage
}
关于ios - 如何使用 Swift 将 ImageView 正确定位在照片顶部,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/40687420/