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Possible Duplicate:
How does one compare one image to another to see if they are similar by a certain percentage, on the iPhone?
我找到了这段代码并试图更好地理解它:
UIImage *img1 = // Some photo;
UIImage *img2 = // Some photo;
NSData *imgdata1 = UIImagePNGRepresentation(img1);
NSData *imgdata2 = UIImagePNGRepresentation(img2);
if ([imgdata1 isEqualToData:imgdata2]) {
NSLog(@"Same Image");
}
这会确认图像 1 与图像 2 完全相同吗？这种方法是最佳实践，还是有更好的方法？