小知识： 数组快速创建 @[@"",@"",@"",@"".......],字典快速创建方法：@{@"",@"",@"",@""......} ,可变，和不可变，
快速实例化一个 UISegmentedControl *segmentedContrl = [[UISegmentedControl alloc]initWithItems:@[@"红色",@"黄色",@"灰色"]]; //里面装的是个数组
UISegmentedControl 继承自UIControl 添加点击事件
设置其位置 通过获取 屏幕居中点
segmentedContrl.bounds = CGRectMake(0, 0, 250, 30);
segmentedContrl.center = CGPointMake(self.view.center.x, self.view.center.y + 15);
默认选中由于里面是个数组
segmentedContrl.selectedSegmentIndex = 0 ;
默认字体 从字典里面去取
[segmentedContrl setTitleTextAttributes:@{NSForegroundColorAttributeName:[UIColor orangeColor]} forState:UIControlStateNormal];
添加事件
[segmentedContrl addTarget:self action:@selector(controlProgress:) forControlEvents:UIControlEventValueChanged];
[self.view addSubview:segmentedContrl];
点击事件
- (void)controlProgress:(UIView *)sender{
//判断该对象是否是 switch 类
if ([sender isKindOfClass:[UISwitch class]]) {
强转 判断传进来是
UISwitch *switchContol = (UISwitch *)sender;
条件表达式 判断开关动画的显示
switchContol.on ? [_indicatorView startAnimating]:[_indicatorView stopAnimating];
}
if ([sender isKindOfClass:[UISlider class]]) {
强转
UISlider *slider = (UISlider *)sender;
self.view.alpha = slider.value;
}
if ([sender isKindOfClass:[UISegmentedControl class]]) {
强转
UISegmentedControl *segmentedContrl = (UISegmentedControl *)sender;
把颜色存入一个数组
NSArray *colorArry = @[[UIColor redColor],[UIColor yellowColor],[UIColor grayColor]];
改变颜色
self.view.backgroundColor = colorArry[segmentedContrl.selectedSegmentIndex];
}
}