关于uiimage

http://www.cnblogs.com/ygm900/archive/2013/06/04/3117923.html

静态方法：

UIImage *myImage = [UIImage imageNamed:@"ppp"];
NSData *imageData = [ NSData initWithBytes:image:imagePtr length:imageSize ]; // 假设 imagePtr 是一个指向原始数据的指针UIImage* myImage = [ [ UIImage alloc ]initWithData:imageData ];
UIImage* myImage3 = [UIImage imageWithCGImage:myCGImageRef];
UIImage* myImage4 = [[UIImage alloc]initWithContentsOfFile:[NSString stringWithFormat:@"%@/Documents/ppp.png",NSHomeDirectory()]];URLWithString:@"http://www.kutx.cn/xiaotupian/icons/png/200803/20080327095245737.png"]] ];