分段控件UISegmentedControl继承与UIControl

UISegmentedControl *segmentedControl = [[UISegmentedControl alloc] initWithItems:@[@"全部商家", @"优惠商家", @"我的"]];    segmentedControl.center = CGPointMake(182, 45);        // 每个segment的大小默认平分整个segmentedControl的大小，如果把apportionsSegmentWidthsByContent设置为YES，会根据内容来分配每一个segment的大小。    segmentedControl.apportionsSegmentWidthsByContent = YES;        // 设置当前选中segment下标    segmentedControl.selectedSegmentIndex = 1;        // 选中瞬间有效果，之后没有，恢复（不怎么用）    // segmentedControl.momentary = YES;        // 字体颜色    segmentedControl.tintColor = [UIColor orangeColor];    // segmentedControl.frame = CGRectMake(10, 30, 345, 30);        // 给segmentedControl添加事件    [segmentedControl addTarget:self action:@selector(doTapSegmentedControl:) forControlEvents:(UIControlEventValueChanged)];        [self.view addSubview:segmentedControl];    [segmentedControl release];

　　

- (void)doTapSegmentedControl:(UISegmentedControl *)segmentControl{    NSLog(@"O(∩_∩)O哈哈~");    switch (segmentcontrol.selectedSegmentIndex) {        case 0:            self.view.backgroundColor = [UIColor redColor];            break;        case 1:            self.view.backgroundColor = [UIColor yellowColor];            break;        case 2:            self.view.backgroundColor = [UIColor blueColor];            break;                    default:            break;    }}