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如何将 iPhone 相机拍摄的照片调整为较低的分辨率？我想从 iPhone 相机拍照并在我的应用程序中将其保存为较低的分辨率。（为了节省空间）或者是否可以像发送图片的电子邮件一样显示图片大小的选项？

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2 回答 2

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试试这个：

-(UIImage *)imageWithImage:(UIImage *)imageToCompress scaledToSize:(CGSize)newSize {

    UIGraphicsBeginImageContextWithOptions(newSize, NO, 0.0);
    [imageToCompress drawInRect:CGRectMake(0, 0, newSize.width, newSize.height)];
    UIImage *newImage = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    return newImage;
}
于 2013-02-05T07:23:16.313 回答
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您可以使用compressionQuality值压缩图像，

-(void)imagePickerController:(UIImagePickerController*)picker didFinishPickingMediaWithInfo:(NSDictionary*)info
{
    //Imagedata = UIImageJPEGRepresentation(<#UIImage *image#>, <#CGFloat compressionQuality#>);

    Imagedata = UIImageJPEGRepresentation([info objectForKey:@"UIImagePickerControllerOriginalImage"],0);
}

您可以使用名称设置大小

    NSLog(@"Video size >> %d",(videodta.length/1024)/1024);
    [picker addAttachmentData:videodta mimeType:@"video/mp4" fileName:[NSString stringWithFormat:@"My Data (size = %d MB)",(videodta.length/1024)/1024 ]];
于 2013-02-05T08:27:23.313 回答