【代码笔记】手机验证码

一，效果图。

images/loading.gif' data-original="http://images2015.cnblogs.com/blog/337518/201510/337518-20151020141518489-179943501.jpg" width="218" height="400" />

二，代码。

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值默认为NO。  NSLog(@"---timeStart--%d-----",timeStart);    //发送验证码到手机上-Button  UIButton *sendYZM=[UIButton buttonWithType:UIButtonTypeCustom];  [sendYZM setFrame:CGRectMake(50, 100, 250, 50)];  [sendYZM setBackgroundColor:[UIColor redColor]];  [sendYZM setTitle:@"发送注册验证码到手机上" 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];  // 可以通过fire这个方法去触发timer，即使timer的firing time没有到达  [sysTimer fire];  [self getAuthCode];}//随时更新验证码发送的时间- (void)timerFireMethod:(NSTimer *)timer{  //定义一个NSCalendar对象  NSCalendar *cal = [NSCalendar currentCalendar];  //初始化目标时间...  NSDateComponents *endTime = [[NSDateComponents alloc] init];  //得到当前时间  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) {    //从NSDate中取出年月日，时分秒，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];    //把目标时间装载入date  NSDate *todate = [cal dateFromComponents:endTime];    //用来得到具体的时差，是为了统一成北京时间  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:@"重新发送验证码(%@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:@"重新发送验证码" 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{  //将电话号码发送到服务器，服务器返回验证码。当验证码和注册用户输入一样的时候，则可以进行下一步操作。}- (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

原标题：【代码笔记】手机验证码

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