Custom arabic font working in iOS 7 but not in iOS 6 or earlier

问题

I have an iPhone app where I am using custom arabic font.

All is working in iOS 7.

When I run the app on iOS 6, the text is appearing in default iPhone font.

Any idea what is going wrong?

iOS 6 Screenshot

iOS 7 Screenshot

If you see the difference, english is working fine. ONLY PROBLEM WITH ARABIC FONT.

回答1:

Problem solved...

UILabel *arTitle = [[UILabel alloc] initWithFrame:CGRectMake(0, 200, 300, 100)];
arTitle.backgroundColor = [UIColor clearColor];
arTitle.textColor = [UIColor blueColor];
arTitle.textAlignment = NSTextAlignmentCenter;
arTitle.font = [UIFont fontWithName:@"GEDinarOne-Medium" size:16.0];
arTitle.numberOfLines = 0;
arTitle.text = @"واللقب هو عربي مع خط مخصص";

// these two line made effect...    
NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc] initWithString:arTitle.text attributes:@{ NSFontAttributeName : [UIFont fontWithName:@"GEDinarOne-Medium" size:16], NSLigatureAttributeName: @2}];

arTitle.attributedText = attributedString;

来源：https://stackoverflow.com/questions/20089680/custom-arabic-font-working-in-ios-7-but-not-in-ios-6-or-earlier