控制音量，播放时间等的UISlider类

-(void)loadView{    [super loadView];    self.view = [[[UIView alloc] initWithFrame:[UIScreen mainScreen].bounds] autorelease];            // 控制音量，播放时间等    UISlider *slider = [[UISlider alloc] initWithFrame:CGRectMake(10, 148, 300, 20)];    // 最大最小值    slider.minimumValue = 0.5;    slider.maximumValue = 10.0;    // 设置默认大小    //slider.value = 2.0;    // 添加事件    [slider addTarget:self               action:@selector(changeVlaue:)     forControlEvents:UIControlEventValueChanged];    [self.view addSubview:slider];    [slider release];