iphone - 根据 UISlider 的值更改 NSTime

Question

关于如何更改UISlider值有很多问题和答案，NsTimer但我需要创建反向条件，我需要更改NSTimer每个值更改的间隔UISlider，并希望滑块值以相反的方式工作。那么任何人都可以帮助实现这一目标吗？

感谢您的方法和时间:)

Answer 1

您可以在方法中设置 Timer 再次设置间隔值，IBAction例如UISlier：-

.h 类：-

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController
{

    IBOutlet UILabel *lblTimer;
    IBOutlet UISlider *timeSlider;
}
@property(nonatomic,strong)NSTimer *timer;

.m 类：-

- (void)viewDidLoad
{
    [super viewDidLoad];
    _timer=[[NSTimer alloc]init];
    _timer = [NSTimer scheduledTimerWithTimeInterval:1 target:self selector:@selector(updateLable) userInfo:nil repeats:YES];

    // Do any additional setup after loading the view, typically from a nib.
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}
int i=0;
-(IBAction)changeSlider:(UISlider*)sender
{

    NSLog(@"%d",(int)sender.value);
    [_timer invalidate];

    _timer=[[NSTimer alloc]init];

    _timer=nil;
    _timer = [NSTimer scheduledTimerWithTimeInterval:(int)sender.value target:self selector:@selector(updateLable) userInfo:nil repeats:YES];
   // i=0;
    //text_field .text= [[NSString alloc] initWithFormat:@" Value %d ", (int)slider.value];
}


-(void)updateLable
{

    [lblTimer setText:[NSString stringWithFormat:@"%d",i]];
    i++;

}

代码输出