如何在一个UIView显示一幅图？
这幅图是从网络上传送过来的，我现在已经解码 并且读到内存中了， 现在该如何在一个view 中显示呢？？？？求大侠赐教～ 有代码的更难好
[最优解释]
据说不能自己调drawInRect，用setneedsdisplay看看
[其他解释]
UIImage *drawimage = [UIImage imageWithCGImage:imageref];//*** __NSAutoreleaseNoPool(): Object 0x1e5950 of class UIImage autoreleased with no pool in place - just leaking
//为什么每一次执行到下面这句话就会在all output中显示:
/*
Thu Aug 30 18:41:14 homewell test[1377] <Error>: CGContextSaveGState: invalid context 0x0
Thu Aug 30 18:41:14 homewell test[1377] <Error>: CGContextSetBlendMode: invalid context 0x0
Thu Aug 30 18:41:14 homewell test[1377] <Error>: CGContextSetAlpha: invalid context 0x0
Thu Aug 30 18:41:14 homewell test[1377] <Error>: CGContextTranslateCTM: invalid context 0x0
Thu Aug 30 18:41:14 homewell test[1377] <Error>: CGContextScaleCTM: invalid context 0x0
Thu Aug 30 18:41:14 homewell test[1377] <Error>: CGContextDrawImage: invalid context 0x0
Thu Aug 30 18:41:14 homewell test[1377] <Error>: CGContextRestoreGState: invalid context 0x0
*/
[drawimage drawInRect:imagerect];
CGImageRelease(imageref);
