【代碼筆記】手機驗證碼

一，效果圖。

二，代碼。

RootViewController.h

#import <UIKit/UIKit.h>

@interface RootViewController : UIViewController

@end

RootViewController.m

#import "RootViewController.h"

@interface RootViewController ()

@end

@implementation RootViewController
{
    NSTimer* sysTimer;
    BOOL timeStart;
}

- (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.
    
    //BOOL值預設為NO。
    NSLog(@"---timeStart--%d-----",timeStart);
    
    //發送驗證碼到手機上-Button
    UIButton *sendYZM=[UIButton buttonWithType:UIButtonTypeCustom];
    [sendYZM setFrame:CGRectMake(50, 100, 250, 50)];
    [sendYZM setBackgroundColor:[UIColor redColor]];
    [sendYZM setTitle:@"發送註冊驗證碼到手機上" forState:UIControlStateNormal];
    [sendYZM setTitleColor:[UIColor colorWithRed:66/255.0 green:66/255.0 blue:221/255.0 alpha:1.0] forState:UIControlStateNormal];
    [sendYZM addTarget:self action:@selector(doClickButton:) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:sendYZM];

}
-(void)doClickButton:(UIButton *)btn
{
    timeStart=YES;
    sysTimer = [NSTimer scheduledTimerWithTimeInterval:1 target:self selector:@selector(timerFireMethod:) userInfo:nil repeats:YES];
    // 可以通過fire這個方法去觸發timer，即使timer的firing time沒有到達
    [sysTimer fire];
    [self getAuthCode];

}

//隨時更新驗證碼發送的時間
- (void)timerFireMethod:(NSTimer *)timer

{
    //定義一個NSCalendar對象
    NSCalendar *cal = [NSCalendar currentCalendar];
    //初始化目標時間...
    NSDateComponents *endTime = [[NSDateComponents alloc] init];
    //得到當前時間
    NSDate *today = [NSDate date];
    NSDate *date = [NSDate dateWithTimeInterval:60 sinceDate:today];
    NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
    [dateFormatter setDateFormat:@"yyyy-MM-dd HH:mm:ss"];
    NSString *dateString = [dateFormatter stringFromDate:date];
    
    static int year;
    static int month;
    static int day;
    static int hour;
    static int minute;
    static int second;
    
    if(timeStart) {
        //從NSDate中取出年月日，時分秒，但是只能取一次
        year = [[dateString substringWithRange:NSMakeRange(0, 4)] intValue];
        month = [[dateString substringWithRange:NSMakeRange(5, 2)] intValue];
        day = [[dateString substringWithRange:NSMakeRange(8, 2)] intValue];
        hour = [[dateString substringWithRange:NSMakeRange(11, 2)] intValue];
        minute = [[dateString substringWithRange:NSMakeRange(14, 2)] intValue];
        second = [[dateString substringWithRange:NSMakeRange(17, 2)] intValue];
        timeStart = NO;
    }
    
    [endTime setYear:year];
    [endTime setMonth:month];
    [endTime setDay:day];
    [endTime setHour:hour];
    [endTime setMinute:minute];
    [endTime setSecond:second];
    
    //把目標時間裝載入date
    NSDate *todate = [cal dateFromComponents:endTime];
    
    //用來得到具體的時差，是為了統一成北京時間
    unsigned int unitFlags = NSYearCalendarUnit| NSMonthCalendarUnit| NSDayCalendarUnit| NSHourCalendarUnit| NSMinuteCalendarUnit| NSSecondCalendarUnit;
    
    NSDateComponents *d = [cal components:unitFlags fromDate:today toDate:todate options:0];
    NSLog(@"----%ld---",[d second]);
    if([d second] < 60 && [d second] > 0) {
        NSString *miao = [NSString stringWithFormat:@"%ld",[d second]];
        NSLog(@"---miao----%@",miao);
        
        UIButton *sendYZM=[UIButton buttonWithType:UIButtonTypeCustom];
        [sendYZM setFrame:CGRectMake(50, 100, 250, 50)];
        [sendYZM setBackgroundColor:[UIColor redColor]];
        [sendYZM setTitle:[NSString stringWithFormat:@"重新發送驗證碼(%@秒)",miao] forState:UIControlStateNormal];
        [sendYZM setTitleColor:[UIColor colorWithRed:66/255.0 green:66/255.0 blue:221/255.0 alpha:1.0] forState:UIControlStateNormal];
        [self.view addSubview:sendYZM];
       
    }else if([d second] == 0) {
        [sysTimer invalidate];
        
        UIButton *sendYZM=[UIButton buttonWithType:UIButtonTypeCustom];
        [sendYZM setFrame:CGRectMake(50, 100, 250, 50)];
        [sendYZM setBackgroundColor:[UIColor redColor]];
        [sendYZM setTitle:@"重新發送驗證碼" forState:UIControlStateNormal];
        [sendYZM setTitleColor:[UIColor colorWithRed:66/255.0 green:66/255.0 blue:221/255.0 alpha:1.0] forState:UIControlStateNormal];
        [sendYZM addTarget:self action:@selector(doClickButton:) forControlEvents:UIControlEventTouchUpInside];
        [self.view addSubview:sendYZM];
    }
}
- (void)getAuthCode{
    //將電話號碼發送到伺服器，伺服器返回驗證碼。當驗證碼和註冊用戶輸入一樣的時候，則可以進行下一步操作。
}


- (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