改变segment样式，改变字体

更改segment的字体

/*
 * 更改UISegmentControl的字体
 * 调用方法
 * [CommonUtil ChangeSegmentFont:aSegmentControl fontSize:13];
 */
+ (void)ChangeSegmentFont:(UIView *)aView fontSize:(NSInteger)fontSize{  
    if ([aView isKindOfClass:[UILabel class]])  
    {  
        UILabel *lb = (UILabel *)aView;  
        [lb setTextAlignment:UITextAlignmentRight];  
        [lb setFont:[UIFont systemFontOfSize:fontSize]];

    }  

    NSArray *na = [aView subviews];  
    NSEnumerator *ne = [na objectEnumerator];  
    UIView *subView;  
    while (subView = [ne nextObject])   
    {  
        [CommonUtil ChangeSegmentFont: subView fontSize:fontSize];  
    }  
}

//假设是一个含有两个segment的UISegmentControl，将各个aView class打印的话 
//依次是UISegmentControl   UISegment、UILabel   UISegment、UILabel   
//如果想增加其他的subview 其实也挺简单  可以选择在UILabel上增加subview

还可以用ios5中的方法，可惜5.0之前的版本不能用

NSDictionary *textDic = [NSDictionary dictionaryWithObjectsAndKeys:
                             [[UIColor blackColor]       colorWithAlphaComponent:0.6f],UITextAttributeTextColor,
                             [UIColor grayColor],UITextAttributeTextShadowColor,
                             [NSValue valueWithUIOffset:UIOffsetMake(1, 0)],UITextAttributeTextShadowOffset,
                             [UIFont systemFontOfSize:13],UITextAttributeFont,nil];

    [mySegment setTitleTextAttributes:textDic forState:UIControlStateNormal];