UIControl
addTarget:action:forControlEvents: 添加响应事件(满足什么条件下 让某人调用某方法)
1.UISegmentedControl分段控制器
UISegmentedControl *seg = [[UISegmentedControl alloc] initWithItems:@[@"消息", @"电话", @"微信"]];
seg.frame = CGRectMake(100, 40, 200, 40);
[self.view addSubview:seg];
[seg release];
//选中分段下标
seg.selectedSegmentIndex = 2;
//背景颜色
seg.backgroundColor = [UIColor blackColor];
//渲染颜色
seg.tintColor = [UIColor lightGrayColor];
//插入新的分段
[seg insertSegmentWithTitle:@"陌陌" atIndex:2 animated:YES];
//添加响应事件 (通过下标值的变化触发方法)
[seg addTarget:self action:@selector(segAction:) forControlEvents:UIControlEventValueChanged];
- (void)segAction:(UISegmentedControl *)seg
{
}
2.UISlider滑块控制器
UISlider *sl = [[UISlider alloc] initWithFrame:CGRectMake(100, 550, 200, 50)];
sl.backgroundColor = [UIColor yellowColor];
[self.view addSubview:sl];
[sl release];
// 颜色设置
// 划过距离的颜色（滑块左）
sl.minimumTrackTintColor = [UIColor blackColor];
// 未滑过的颜色（滑块右）
sl.maximumTrackTintColor = [UIColor redColor];
// 滑块颜色
sl.thumbTintColor = [UIColor greenColor];
// 滑动范围
// 最小值
sl.minimumValue = -100;
// 最大值
sl.maximumValue = 1000;
// 更新滑块起始点(value默认从0开始)
sl.value = -100;
// 添加响应事件
[sl addTarget:self action:@selector(sliderAction:) forControlEvents:UIControlEventValueChanged];
- (void)sliderAction:(UISlider *)sl
{
}
3.UISwitch 开关
UISwitch *sw = [[UISwitch alloc] initWithFrame:CGRectMake(250, 150, 100, 50)];
sw.backgroundColor = [UIColor whiteColor];
[self.view addSubview:sw];
[sw release];
// 开关属性
sw.on = YES;
// 开启状态颜色
sw.onTintColor = [UIColor brownColor];
// 按钮的颜色
sw.thumbTintColor = [UIColor redColor];
// 关闭时边框颜色
sw.tintColor = [UIColor cyanColor];
[sw addTarget:self action:@selector(switchAction:) forControlEvents:UIControlEventValueChanged];
- (void)switchAction:(UISwitch *)sw
{
if (sw.on) {
NSLog(@"开启");
}else{
NSLog(@"关闭");
}
}
