UIGraphicsGetImageFromCurrentImageContext，alloc版本？

Question

UIGraphicsGetImageFromCurrentImageContext返回自动释放的UIImage。

想知道是否有办法从上下文中获取“alloc”-ed图像？

我想要一些与以下代码相当的东西，也许代码是我能做的最好的？

NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];     
UIImage* image = get image by UIGraphicsGetImageFromCurrentImageContenxt
[image retain];
[pool release];

Answer 1

只需在结果上调用-retain。

UIImage *image = [UIGraphicsGetImageFromCurrentImageContext() retain];