Answer by Joseph Razon IL for How to know when text is pasted into a UITextView?

This is what I use to detect pasted images:

- (BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text{    if (UIPasteboard.generalPasteboard.image &&        [UIPasteboard.generalPasteboard.string.lowercaseString isEqualToString:text.lowercaseString]) {       //Pasted image        return NO;    }    return YES;}