如何获取从`UIImagePickerController`收到的图像的压缩文件大小？ [英] How to get the compressed file size of an image received from `UIImagePickerController`?

问题描述

我想通过camara或库知道 UIImagePickerController 拍摄的图像大小。有没有办法找到它？

I want to know the size of image taken by UIImagePickerController by camara or library. Is there any way to find that ?

要求就像，

如果图像大小超过1 MB比我想要压缩它。

If image size is more than 1 MB than i want to compress it.

提前感谢。

推荐答案

试试这个：

try this:

CGFloat compression = 0.8f;
CGFloat maxCompression = 0.1f;
int maxFileSize = 1024;
UIImage *img =[UIImage imageNamed:@"anyimg.jpg"];
NSData *imageData = UIImageJPEGRepresentation(img, compression);

while ([imageData length] > maxFileSize && compression > maxCompression)
{
    compression -= 0.1;
    imageData = UIImageJPEGRepresentation(img, compression);
    NSLog(@"%d",[imageData length]);
}
NSLog(@"image size %d",[imageData length]);

获取图像尺寸：

NSData * data_size = UIImagePNGRepresentation（yourImage）;

int image_size = [data_size length];

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