ios - How to resize an image in iOS?

Question

hi I want to send an image to a web service. But I want to resize user selected any image into 75 x 75 and send it to web service. How can I resize this image into 75 x 75

Thanks

Answer 1

以下のコードを実装してみてください。あなたに役立つかもしれません：

    CGRect rect = CGRectMake(0,0,75,75);
    UIGraphicsBeginImageContext( rect.size );
    [yourCurrentOriginalImage drawInRect:rect];
    UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();

Answer 2

この方法を使用して、画像のサイズを変更します。

+(UIImage *)imageResize :(UIImage*)img andResizeTo:(CGSize)newSize
{
    CGFloat scale = [[UIScreen mainScreen]scale];
    /*You can remove the below comment if you dont want to scale the image in retina   device .Dont forget to comment UIGraphicsBeginImageContextWithOptions*/
    //UIGraphicsBeginImageContext(newSize);
    UIGraphicsBeginImageContextWithOptions(newSize, NO, scale);
    [img drawInRect:CGRectMake(0,0,newSize.width,newSize.height)];
    UIImage* newImage = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    return newImage;
}

Answer 3

このコードを試してください:

- (UIImage *)imageWithImage:(UIImage *)image scaledToSize:(CGSize)newSize
{
    UIGraphicsBeginImageContext(newSize);
    [image drawInRect:CGRectMake(0, 0, newSize.width, newSize.height)];
    UIImage *newImage = UIGraphicsGetImageFromCurrentImageContext();    
    UIGraphicsEndImageContext();
    return newImage;
}