一,效果图。二,代码。RootViewController.h#import <UIKit/UIKit.h>@interface RootViewController : UIViewController{ UILabel *label; NSDateFormat ...
一,效果图。
二,代码。
RootViewController.h
#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]];}
原标题:【代码笔记】UILable电子表显示
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