iphone常用控件之UISlider

//UISlider触发的动作

-(void)sliderValueChanged:(id)sender{    
    UISlider *control = (UISlider *)sender;    
    if (control == mySlider) {
        float value = control.value;     
        /*添加代码，对滑块的值做出响应*/        
    }  
}
-(void)viewDidLoad{
    /***********滑块控件UISlider**************/
    
    //创建控件
    UISlider *slider = [[UISlider alloc] initWithFrame:CGRectMake(0, 0, 200, 0)];//高度可忽略
    //设置控件范围， 默认为0.0--1.0
    [slider setMinimumValue:0.0];
    slider.maximumValue = 100.0;
    //设置默认值
    slider.value = 50.0;
    //在控件一端显示图像
    [slider setMinimumTrackImage:[UIImageimageNamed:@"min.png"] forState:UIControlStateNormal];//滑块可用状态 4种
    [slider setMaximumTrackImage:[UIImageimageNamed:@"max.png"] forState:UIControlStateNormal];
    //显示控件
    [parentView addSubview: slider];//添加到父视图
    self.navigationItem.titleView = slider;//添加到导航栏
    //读取控件
    float value = slider.value;
    //滑块值变化时触发事件
    [slider addTarget:selfaction:@selector(sliderValueChanged:) forControlEvents:UIControlEventValueChanged];
    
}