我有NSBitmap
ImageRep是WxH大小.我创建NSImage并做addRepresentation：.然后我需要调整NSImage的大小.我尝试了setSize方法,但它不起作用.我该怎么办？
解决方法
因为Paresh的方法是完全正确的,而是自10.8以来弃用,我将在下面发布工作的10.8代码.所有这一切都归功于Paresh的答案.
- (NSImage *)imageResize:(NSImage*)anImage newSize:(NSSize)newSize {
NSImage *sourceImage = anImage;
[sourceImage setScalesWhenResized:YES];
// Report an error if the source isn't a valid image
if (![sourceImage isValid]){
NSLog(@"Invalid Image");
} else {
NSImage *smallImage = [[NSImage alloc] initWithSize: newSize];
[smallImage lockFocus];
[sourceImage setSize: newSize];
[[NSGraphicsContext currentContext] setImageInterpolation:NSImageInterpolationHigh];
[sourceImage drawAtPoint:NSZeroPoint fromRect:CGRectMake(0,newSize.width,newSize.height) operation:NSCompositeCopy fraction:1.0];
[smallImage unlockFocus];
return smallImage;
}
return nil;
}
