IOS實(shí)現(xiàn)驗(yàn)證碼倒計(jì)時(shí)功能（二）

更新時(shí)間：2016年04月13日 15:26:41 作者：學(xué)偉愛(ài)OS

這篇文章主要介紹了IOS實(shí)現(xiàn)驗(yàn)證碼倒計(jì)時(shí)功能，點(diǎn)擊獲取驗(yàn)證碼，進(jìn)入時(shí)間倒計(jì)時(shí)，感興趣的小伙伴們可以參考一下

驗(yàn)證碼倒計(jì)時(shí)按鈕的應(yīng)用是非常普遍的，該Blog就和你一起來(lái)實(shí)現(xiàn)驗(yàn)證碼倒計(jì)時(shí)的效果，定義一個(gè)發(fā)送驗(yàn)證碼的按鈕，添加點(diǎn)擊事件，具體內(nèi)容如下

具體代碼：

定義一個(gè)發(fā)送驗(yàn)證碼的按鈕，添加點(diǎn)擊事件

 //發(fā)送驗(yàn)證碼按鈕
  _sentCodeBtn = [[UIButton alloc] initWithFrame:CGRectMake(kScreenWidth - 27 - 4 - 94, CGRectGetMinY(_registerCodeFD.frame) + 4, 94, 40)];
  [_sentCodeBtn setBackgroundColor:colorWithRGBA(0, 191, 191, 0.9)];
  [_sentCodeBtn setTitle:@"發(fā)送驗(yàn)證碼" forState:UIControlStateNormal];
  [_sentCodeBtn.titleLabel setFont:[UIFont systemFontOfSize:13.0f]];
  //設(shè)置圓角
  [_sentCodeBtn.layer setCornerRadius:3.0f];
  [_sentCodeBtn.layer setShouldRasterize:YES];
  [_sentCodeBtn.layer setRasterizationScale:[UIScreen mainScreen].scale];
  //發(fā)送事件
  [_sentCodeBtn addTarget:self action:@selector(sentCodeMethod) forControlEvents:UIControlEventTouchUpInside];
  [self.view addSubview:_sentCodeBtn];

監(jiān)聽(tīng)事件：

//發(fā)送驗(yàn)證碼
-(void)sentCodeMethod{
 NSLog(@"發(fā)送驗(yàn)證碼。。");
 //計(jì)時(shí)器發(fā)送驗(yàn)證碼
 [self sentPhoneCodeTimeMethod];
 //調(diào)用發(fā)送驗(yàn)證碼接口-》

}

//計(jì)時(shí)器發(fā)送驗(yàn)證碼
-(void)sentPhoneCodeTimeMethod{
 //倒計(jì)時(shí)時(shí)間 - 60秒
 __block NSInteger timeOut = 59;
 //執(zhí)行隊(duì)列
 dispatch_queue_t queue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0);
 //計(jì)時(shí)器 -》dispatch_source_set_timer自動(dòng)生成
 dispatch_source_t timer = dispatch_source_create(DISPATCH_SOURCE_TYPE_TIMER, 0, 0, queue);
 dispatch_source_set_timer(timer, DISPATCH_TIME_NOW, 1.0 * NSEC_PER_SEC, 0 * NSEC_PER_SEC);
 dispatch_source_set_event_handler(timer, ^{
  if (timeOut <= 0) {
   dispatch_source_cancel(timer);
   //主線程設(shè)置按鈕樣式-》
   dispatch_async(dispatch_get_main_queue(), ^{
    [_sentCodeBtn setTitle:@"發(fā)送驗(yàn)證碼" forState:UIControlStateNormal];
    [_sentCodeBtn setUserInteractionEnabled:YES];
   });
  }else{
   //開(kāi)始計(jì)時(shí)
   //剩余秒數(shù) seconds
   NSInteger seconds = timeOut % 60;
   NSString *strTime = [NSString stringWithFormat:@"%.1ld",seconds];
   //主線程設(shè)置按鈕樣式
   dispatch_async(dispatch_get_main_queue(), ^{
    [UIView beginAnimations:nil context:nil];
    [UIView setAnimationDuration:1.0];
    [_sentCodeBtn setTitle:[NSString stringWithFormat:@"%@S后重新發(fā)送",strTime] forState:UIControlStateNormal];
    [UIView commitAnimations];
    //計(jì)時(shí)器件不允許點(diǎn)擊
    [_sentCodeBtn setUserInteractionEnabled:NO];
   });
   timeOut--;
  }
 });
 dispatch_resume(timer);
}

以上就是本文的全部?jī)?nèi)容，希望對(duì)大家的學(xué)習(xí)有所幫助。

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