// 图片路径
NSString *path = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject];
NSString *imagePath = [path stringByAppendingPathComponent:@"iconImage.png"];
/*读取入图片*/
//因为拿到的是个路径,所以把它加载成一个data对象
NSData *data = [NSData dataWithContentsOfFile:imagePath];
原文:http://www.cnblogs.com/Milo-CTO/p/3990182.html