如何 給 iOS UIFont 設置字重?

如何 給 iOS UIFont 設置字重

UILabel *label = [[UILabel alloc] init];
if (@available(iOS 8.2, *)) {
    label.font = [UIFont systemFontOfSize:16 weight:UIFontWeightMedium];
} else {
    // Fallback on earlier versions
    label.fontSystemSize = 16;
}

注意 systemFontOfSize:weight: 是從iOS8.2才支持的, 一定要判斷.