iOS倒计时
Posted iOS_Doman
tags:
篇首语:本文由小常识网(cha138.com)小编为大家整理,主要介绍了iOS倒计时相关的知识,希望对你有一定的参考价值。
现在开发基本上都有发送验证码,倒计时,下面说一种
#import <UIKit/UIKit.h> @interface UIButton (CountDown) -(void)startTime:(NSInteger )timeout title:(NSString *)tittle waitTittle:(NSString *)waitTittle; @end
#import "UIButton+CountDown.h" @implementation UIButton (CountDown) -(void)startTime:(NSInteger )timeout title:(NSString *)tittle waitTittle:(NSString *)waitTittle{ __block NSInteger timeOut=timeout; //倒计时时间 dispatch_queue_t queue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0); dispatch_source_t _timer = dispatch_source_create(DISPATCH_SOURCE_TYPE_TIMER, 0, 0,queue); dispatch_source_set_timer(_timer,dispatch_walltime(NULL, 0),1.0*NSEC_PER_SEC, 0); //每秒执行 dispatch_source_set_event_handler(_timer, ^{ if(timeOut<=0){ //倒计时结束,关闭 dispatch_source_cancel(_timer); dispatch_async(dispatch_get_main_queue(), ^{ //设置界面的按钮显示 根据自己需求设置 [self setTitle:tittle forState:UIControlStateNormal]; self.userInteractionEnabled = YES; }); }else{ // int minutes = timeout / 60; int seconds = timeOut % 60; NSString *strTime = [NSString stringWithFormat:@"%.2d", seconds]; dispatch_async(dispatch_get_main_queue(), ^{ //设置界面的按钮显示 根据自己需求设置 NSLog(@"____%@",strTime); [self setTitle:[NSString stringWithFormat:@"%@%@",strTime,waitTittle] forState:UIControlStateNormal]; self.userInteractionEnabled = NO; }); timeOut--; } }); dispatch_resume(_timer); } @end
以上是关于iOS倒计时的主要内容,如果未能解决你的问题,请参考以下文章