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];