ios - iOS loading custom fonts dynamically error collection retain

Question

Single stepping until exit from function __CFTypeCollectionRetain

 NSData *inData =[[NSData alloc] initWithContentsOfFile:@"NafeesWeb.ttf"]; /* your decrypted font-file data */;
    CFErrorRef error;
    CGDataProviderRef provider = CGDataProviderCreateWithCFData((CFDataRef)inData);
    CGFontRef font = CGFontCreateWithDataProvider(provider);
    if (! CTFontManagerRegisterGraphicsFont(font, &error)) {
        CFStringRef errorDescription = CFErrorCopyDescription(error);
        NSLog(@"Failed to load font: %@", errorDescription);
        CFRelease(errorDescription);
    }
    CFRelease(font);
    CFRelease(provider);

I also want to unregister this font after use.

Answer 1

您是否尝试过单步执行或记录inData以确保它不是nil？

您应该使用绝对路径initWithContentsOfFile:，因此您可能不会首先加载数据。

尝试：NSData *inData =[[NSData alloc] initWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"NafeesWeb" ofType:@"ttf"]];