UISlider 使用

 

  sharpenSlider = [[UISlider alloc] initWithFrame:CGRectMake(50.0, 355.0, 220.0, 40.0)];

    sharpenSlider.minimumValue = 0.0f;   //最小
    sharpenSlider.maximumValue = 10.0f;//最大
    sharpenSlider.continuous = YES;
    sharpenSlider.value = 5.0f;//初始化
    [sharpenSlider addTarget:self action:@selector(     ) forControlEvents:UIControlEventValueChanged];
    [self.view addSubview:sharpenSlider];