问题描述
我已经有了一个控制文本标签输出的滑块.
I already have a slider that controls the output of a text label.
-(IBAction)mySlider:(UISlider *)sender
{
_myTextLabel.text = [NSString stringWithFormat:@"%i", (int) sender.value];
}
但是，我还希望步进器能够改变滑块的位置.因此，如果将滑块设置为50，并且文本标签显示为50，则我希望步进器增加到51、52、53等.有人知道执行此操作的代码吗?谢谢！
However, I also want a stepper to be able to changer the slider's position. So, if the slider has been set to 50, and the text label says 50, I want the stepper to increment to 51, 52, 53, etc. Does anyone know the code to do this? Thanks!
推荐答案
您将需要保留UISlider的引用.使用valueChanged事件为UIStepper创建处理程序.
You will need to keep an reference for the UISlider. Make a handler for UIStepper with valueChanged event.
步进器和滑块都需要进行一些设置
Some settings that need to be done for both stepper and slider
将步进器和滑块的最小值和最大值分别设置为0和100.将stepper的步长设置为1.将两个stepper ans滑块的默认值设置为相同.
Set minimum value and maximum value for both stepper and slider as 0 and 100 respectively. Set the step size of stepper as 1. Set the default value same for both stepper ans slider.
- (void)viewDidLoad
{
[super viewDidLoad];
self.slider.minimumValue = 0;
self.slider.maximumValue = 100;
self.stepper.minimumValue = 0;
self.stepper.maximumValue = 100;
self.stepper.stepValue = 1;
self.slider.value = 10;
self.stepper.value = 10;
}
- (IBAction)stepperValueChanged:(UIStepper *)sender {
[self.slider setValue:sender.value];
self.myTextLabel.text = [@((int)sender.value) stringValue];
}
- (IBAction)sliderValueChanged:(UISlider *)sender {
[self.stepper setValue:sender.value];
self.myTextLabel.text = [@((int)sender.value) stringValue];
}
这篇关于iOS使用步进器控制滑块值和文本标签值的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！