ios - *** 错误 *** CGImageSource 创建时数据大小为 : 22467 - current size is only: 6139

Question

将图像保存到照片时出现此错误: * 错误 * CGImageSource 创建时数据大小:22467 - 当前大小仅为:6139

let canvasframe = self.canvasView.frame
                self.canvasView.frame = CGRectMake(0, 0, self.size.width, self.size.height)
                UIImageWriteToSavedPhotosAlbum(self.getUIImageFromThisUIView(self.canvasView),nil,nil,nil);
                self.canvasView.frame = canvasframe


func getUIImageFromThisUIView(aUIView: UIView) -> UIImage {
        UIGraphicsBeginImageContext(aUIView.bounds.size)
        aUIView.layer.renderInContext(UIGraphicsGetCurrentContext()!)
        let viewImage: UIImage = UIGraphicsGetImageFromCurrentImageContext()
        UIGraphicsEndImageContext()
        return viewImage
    }

Answer 1

当我们尝试从文档目录中获取 png 文件并且我们直接将文件的内容分配给本地 UIImage 变量时，就会出现此问题。而不是这样做，首先获取文件内容的数据，然后将数据转换为 UIImage。简而言之

改变这个:

let img = UIImage(contentsOfFile: filename)

为此:

let img = NSData(contentsOfFile: filename)
let photo = UIImage(data: img!)!

这对我有用。希望对你有帮助