在 Xcode 中检查图像的大小
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check the size of image in Xcode
提问by Sohan
When i copy some image files (PNG format only) into my app in Xcode, is the size of the image altered?
当我在 Xcode 中将一些图像文件（仅限 PNG 格式）复制到我的应用程序中时，图像的大小是否发生了变化？
Alternately, how can i check the size of my PNG image within xcode?
或者，如何在 xcode 中检查 PNG 图像的大小？
Thanks in advance!
提前致谢！
回答by Cyprian
Here is how you can print the size in bytes:
以下是打印字节大小的方法：
UIImage *myImage = [UIImage imageNamed:@"xxx.png"];
NSLog(@"MyImage size in bytes:%i",[UIImagePNGRepresentation(myImage) length]);
回答by Cocoanetics
PNG files are unchanged when you add them to your Xcode project. They are compressed with pngcrush at time of build. You can right-click on your .app result, and look at the package contents to see the final file sizes of the images.
当您将 PNG 文件添加到您的 Xcode 项目时，它们不会发生变化。它们在构建时用 pngcrush 压缩。您可以右键单击 .app 结果，然后查看包内容以查看图像的最终文件大小。
Or if you are not talking about file size, but pixel size then you can load the image into a UIImage and query its "size" property.
或者，如果您不是在谈论文件大小，而是在谈论像素大小，那么您可以将图像加载到 UIImage 中并查询其“大小”属性。
回答by gsempe
You create an UIImageView and then you print the frame of your new UIImageView
您创建一个 UIImageView，然后打印新 UIImageView 的框架
UIImageView imageView = [[UIImageView alloc] initWithImage:[[UIImage alloc] initWithData:/*image path */];
NSLog(@"photoLoaderDidLoad: self.frame %@",NSStringFromCGRect(imageView.frame));
回答by Darkngs
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)editInfo{
UIImage *image=[editInfo valueForKey:UIImagePickerControllerOriginalImage];
NSURL *imageURL=[editInfo valueForKey:UIImagePickerControllerReferenceURL];
__block long long realSize;
ALAssetsLibraryAssetForURLResultBlock resultBlock=^(ALAsset *asset)
{
ALAssetRepresentation *representation=[asset defaultRepresentation];
realSize=[representation size];
};
ALAssetsLibraryAccessFailureBlock failureBlock=^(NSError *error)
{
NSLog(@"%@", [error localizedDescription]);
};
if(imageURL)
{
ALAssetsLibrary *assetsLibrary=[[[ALAssetsLibrary alloc] init] autorelease];
[assetsLibrary assetForURL:imageURL resultBlock:resultBlock failureBlock:failureBlock];
}
}
