How to show if image is on pasteboard in iOS

Question

I want to show pasteboard content in an UIImageview if pasteboard contains image.

How can I do it? I tried with UIPasteboard, but how can I check which type of image it contains?

Answer 1

You don't need the type of data to show the image, just do:

UIPasteboard *appPasteBoard = [UIPasteboard pasteboardWithName:@"CopyPaste" create:YES];
NSData *data = [appPasteBoard dataForPasteboardType:@"com.yourCompany.yourApp.yourType"];
imageView.image = [UIImage imageWithData:data];

However, you could guess the type by looking at the first byte (source):

+ (NSString *)contentTypeForImageData:(NSData *)data {
    uint8_t c;
    [data getBytes:&c length:1];

    switch (c) {
    case 0xFF:
        return @"image/jpeg";
    case 0x89:
        return @"image/png";
    case 0x47:
        return @"image/gif";
    case 0x49:
    case 0x4D:
        return @"image/tiff";
    }
    return nil;
}