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  • 【代码笔记】iOS-UILable电子表显示

    一,效果图。

    二,代码。

    RootViewController.h

    复制代码
    #import <UIKit/UIKit.h>
    
    @interface RootViewController : UIViewController
    {
        UILabel *label;
        NSDateFormatter  *dateFormatter ;
    }
    @end
    复制代码

     

    RootViewController.m

    复制代码
    #import "RootViewController.h"
    
    @interface RootViewController ()
    
    @end
    
    @implementation RootViewController
    
    - (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
    {
        self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
        if (self) {
            // Custom initialization
        }
        return self;
    }
    
    - (void)viewDidLoad
    {
        [super viewDidLoad];
        // Do any additional setup after loading the view.
        
        //label
        label=[[UILabel alloc]initWithFrame:CGRectMake(50, 100, 200, 200)];
        label.backgroundColor=[UIColor redColor];
        [self.view addSubview:label];
        
        //定时器
        [NSTimer scheduledTimerWithTimeInterval:1.0f target:self selector:@selector(updateTime) userInfo:nil repeats:YES];
        
        dateFormatter = [[NSDateFormatter alloc] init];
        [dateFormatter setDateFormat:@"HH:mm:ss"];
        
    }
    - (void)updateTime
    {
        label.text = [dateFormatter stringFromDate:[NSDate date]];
    }
    复制代码

     

     

     
     
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  • 原文地址:https://www.cnblogs.com/yang-guang-girl/p/5727997.html
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