iOS 擷取目前時間並且顯示走在視圖上

iOS 擷取目前時間並且顯示走在視圖上

//

// RootViewController.m

// 時間戳記在走並且顯示Demo

//

// Created by Dubai on 15/4/2.

// Copyright (c) 2015年 Dubai. All rights reserved.

//

 

#import "RootViewController.h"

 

@interface RootViewController ()

{

 

UILabel *labelTime;

NSTimer *timeNow;

 

}

 

@end

 

@implementation RootViewController

 

- (void)viewDidLoad {

[super viewDidLoad];

// Do any additional setup after loading the view.

self.view.backgroundColor = [UIColor orangeColor];

 

labelTime = [[UILabel alloc] initWithFrame:CGRectMake(60, 100, 200, 50)];

labelTime.backgroundColor = [UIColor redColor];

 

[self.view addSubview:labelTime];

timeNow = [NSTimer scheduledTimerWithTimeInterval:1.0f target:self selector:@selector(timerFunc) userInfo:nil repeats:YES];

 

//擷取系統時間

NSDate * senddate=[NSDate date];

NSDateFormatter *dateformatter=[[NSDateFormatter alloc] init];

[dateformatter setDateFormat:@"HH:mm"];

NSString * locationString=[dateformatter stringFromDate:senddate];

NSLog(@"-------%@",locationString);

//擷取系統時間

NSCalendar * cal=[NSCalendar currentCalendar];

NSUInteger unitFlags=NSDayCalendarUnit|NSMonthCalendarUnit|NSYearCalendarUnit;

NSDateComponents * conponent= [cal components:unitFlags fromDate:senddate];

NSInteger year=[conponent year];

NSInteger month=[conponent month];

NSInteger day=[conponent day];

NSString * nsDateString= [NSString stringWithFormat:@"%4d年%2d月%2d日",year,month,day];

NSLog(@"+++++++++++++%@",nsDateString);

}

- (void)timerFunc

{

 

NSDateFormatter *formatter = [[NSDateFormatter alloc] init];

 

[formatter setDateFormat:@"MM/dd/YY HH:mm:ss"];

 

NSString *timestamp = [formatter stringFromDate:[NSDate date]];

 

[labelTime setText:timestamp];//時間在變化的語句

 

NSLog(@"%@",timestamp);

 

 

 

 

}

 

- (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