self.segment = [[UISegmentedControl alloc]initWithItems:@[@"首付",@"贷款"]];

    //默认值为NO，即点击后保持选中状态，如果设置为YES则，只是短暂的显示选中状态

    self.segment.momentary=NO;

    self.segment.tintColor = [UIColor blackColor];

//    self.segment.backgroundColor = [UIColor whiteColor];  //

    self.segment.layer.masksToBounds=YES;              //    默认为no，不设置则下面一句无效

    self.segment.layer.cornerRadius=5.0;              //    设置圆角大小，同UIView

    self.segment.layer.borderWidth = 1;                  //    边框宽度，重新画边框，若不重新画，可能会出现圆角处无边框的情况

    self.segment.layer.borderColor = [UIColor blackColor].CGColor; //    边框颜色

    [self.segment addTarget:self action:@selector(segmentAction:) forControlEvents:UIControlEventValueChanged];

    [self.contentView addSubview:self.segment];

    NSDictionary * selectedTextAttributes =@{NSFontAttributeName:[UIFont systemFontOfSize:14],NSForegroundColorAttributeName:[UIColor whiteColor]};

    [self.segment setTitleTextAttributes:selectedTextAttributes forState:UIControlStateSelected];//设置文字属性

    NSDictionary* unselectedTextAttributes =@{NSFontAttributeName:[UIFont systemFontOfSize:14],NSForegroundColorAttributeName:[UIColor blackColor]};

    [self.segment setTitleTextAttributes:unselectedTextAttributes forState:UIControlStateNormal];

    [self.segment setBackgroundImage:[self buttonImageFromColor:IWColor(13, 111, 4)] forState:UIControlStateSelected barMetrics:UIBarMetricsDefault];

    [self.segment setBackgroundImage:[self buttonImageFromColor:[UIColor whiteColor]] forState:UIControlStateNormal barMetrics:UIBarMetricsDefault];

//通过颜色来生成一个纯色图片

- (UIImage*)buttonImageFromColor:(UIColor*)color{

    CGRectrect =CGRectMake(0,0,40,35);

    UIGraphicsBeginImageContext(rect.size);

    CGContextRef context = UIGraphicsGetCurrentContext();

    CGContextSetFillColorWithColor(context, [color CGColor]);

    CGContextFillRect(context, rect);

    UIImage *img = UIGraphicsGetImageFromCurrentImageContext();

    UIGraphicsEndImageContext();

    returnimg;

}