ios中分段控件的使用

    NSArray *array=[NSArray arrayWithObjects:@"亚洲",@"欧洲",@"美国",nil];
    UISegmentedControl *seg=[[UISegmentedControl alloc]initWithItems:array];
    seg.frame=CGRectMake(30, 100, 300, 50);
//修改颜色
    seg.tintColor=[UIColor yellowColor];
//默认选中下标
    seg.selectedSegmentIndex=1;
//添加点击事件
    [seg addTarget:self action:@selector(selectWitch) forControlEvents:UIControlEventValueChanged];
    [self.view addSubview:seg];