UISegmentedControl某一项标题文字显示不全的坑

① 子类化,然后重写layoutSubviews,即可解决
② 自定义或者第三方Tab切换的框架

- (void)layoutSubviews{
    [super layoutSubviews];
    for (UIView *subView in self.subviews) {
            for (UIView *subSubview in subView.subviews) {
                if ([subSubview isKindOfClass:[UILabel class]]) {
                    UILabel *label = (UILabel *)subSubview;
                    label.adjustsFontSizeToFitWidth = YES;
                }
            }
        }
}