以下是将图片保存为PNG的代码。也可以保存为TIFF, BMP, GIF, JPEG格式。

 
 

NSBitmapImageRep *bits = …; // get a rep from your image, or grab from a view

 

 

 
NSData *data;
 

data = [bits representationUsingType: NSPNGFileType

 

 

                                           properties: nil];
 

[data writeToFile: @"/path/to/wherever/test.png"

 

 

            atomically: NO];