2016-01-07 定时器

#import "timerViewController.h"

 

@interface timerViewController ()

{

    NSTimer *timerTaks;

    int  CountdownInt;

    UILabel  *labCountdown;

}

@end

 

@implementation timerViewController

 

- (void)viewDidLoad {

    [super viewDidLoad];

    self.view.backgroundColor=[UIColor whiteColor];

    CountdownInt=0;

    

    labCountdown=[[UILabel alloc]initWithFrame:CGRectMake(30, 100, 50, 40)];

    labCountdown.backgroundColor=[UIColor yellowColor];

    labCountdown.textColor=[UIColor redColor];

    [self.view addSubview:labCountdown];

    timerTaks = [NSTimer scheduledTimerWithTimeInterval:1 target:self selector:@selector(CountdownTimeer) userInfo:nil repeats:YES];

}

 

 

 

 

-(void)CountdownTimeer

{

    CountdownInt++;

    if (CountdownInt==60) {

        [timerTaks invalidate];

       

        labCountdown.hidden = YES;

        CountdownInt = 0;

    }else

    {

        labCountdown.text = [NSString stringWithFormat:@"%ds",60-CountdownInt];

        

    }

    

    

    

}

 

 

- (void)didReceiveMemoryWarning {

    [super didReceiveMemoryWarning];

    // Dispose of any resources that can be recreated.

}

 

/*

#pragma mark - Navigation

 

// In a storyboard-based application, you will often want to do a little preparation before navigation

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {

    // Get the new view controller using [segue destinationViewController].

    // Pass the selected object to the new view controller.

}

*/

 

@end