使用Objective-C以编程方式将方法分配给UISlider

Question

我添加UISlider以编程方式查看：

UISlider * sideslider = [[UISlider alloc] initWithFrame:CGRectMake(canvasWidth +((canvasWidth) - (recwidth) / 4) /b2, recheight - 70, (recwidth) / 4, 20)];
[sideslider setMaximumValue:solution0->Plan->HDivisions.count];
// sideslider 
int slidervalue = sideslider.value;
[self addSubview:sideslider];

我需要添加此事件处理程序

-(IBAction)updateside:(UISlider *)sender;

创建后

到此滑块？

Answer 1

[slider addTarget:self action:@selector(updateside:) forControlEvents:UIControlEventValueChanged];

Answer 2

您需要指定：

[sideslider addTarget:self action:@selector(updateside:) forControlEvents:UIControlEventValueChanged];

找出发件人的值（sideslider）：

-(IBAction)updateside:(id)sender
{
    UISlider * slider = (UISlider*)sender;
    NSLog(@"Slider Value: %.1f", [slider value]);
}