Rectangle image scale to aspect fit square to use with MPMediaItemArtwork

Question

MPMediaItemArtwork *albumArt = [[MPMediaItemArtwork alloc] initWithImage:image]];

I have an UIImage which is rectangle, It's cropped to square when I put it to MPNowPlayingInfoCenter using MPMediaItemArtwork. How can I resize an UIImage to fit a square UIImage by width and leave the rest in blank?

score 2 · Accepted Answer · answered Nov 09 '16 at 07:43

2

put UIImage into an UIImageView, set contentMode for UIImageView is UIViewContentModeScaleAspectFit and render it back to UIImage.

+ (UIImage *)imageToSquare:(UIImage *)image byWidth:(float)width{
        UIImageView *view = [[UIImageView alloc]initWithFrame:CGRectMake(0, 0, width, width)];
        [view setImage:image];
        view.contentMode = UIViewContentModeScaleAspectFit;

        UIGraphicsBeginImageContextWithOptions(view.bounds.size, view.opaque, 0.0);
        [view.layer renderInContext:UIGraphicsGetCurrentContext()];

        UIImage * img = UIGraphicsGetImageFromCurrentImageContext();

        UIGraphicsEndImageContext();

        return img;
    }

answered Nov 09 '16 at 07:43

Jared Chu

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Awesome answer! – user7097242 May 22 '19 at 22:02
But when running on Xcode it is giving a warning " [UIImageView initWithFrame:] must be used from main thread" – user7097242 May 22 '19 at 23:19
Please refer to this question: https://stackoverflow.com/questions/45081731/uiapplication-delegate-must-be-called-from-main-thread-only – Jared Chu May 23 '19 at 02:03

Rectangle image scale to aspect fit square to use with MPMediaItemArtwork

1 Answers1