如何获取UIImage的大小（KB）

Question

我从didFinishPickingMediaWithInfo获得了图片。

UIImage *originalImage = (UIImage*)[info valueForKey:UIImagePickerControllerOriginalImage];

我想在Kb中获得Image的大小。

Answer 1

    UIImage *originalImage = (UIImage*)[info valueForKey:UIImagePickerControllerOriginalImage];
    NSData *imgData = UIImageJPEGRepresentation(originalImage, 1); //1 it represents the quality of the image.
    NSLog(@"Size of Image(bytes):%d",[imgData length]);
    imgData = nil;

Answer 2

我认为操作size (kb)是originalImage的内存大小，对吗？

查看ARC下malloc_size的使用情况，请参阅this。

#import <malloc/malloc.h>

NSLog(@"Size of %@: %zd", NSStringFromClass([originalImage class]), malloc_size((__bridge const void *)originalImage));