button获取验证码60秒倒计时 直接用
__block int time = 60; __block UIButton *verifybutton = _GetverificationBtn; verifybutton.enabled = NO; 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(time<=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 verifybutton.backgroundColor = [UIColor colorWithHexString:@"FC740A"]; [verifybutton setTitle:@"获取验证码" forState:UIControlStateNormal]; verifybutton.enabled = YES; }); }else{ dispatch_async(dispatch_get_main_queue(), ^{ //设置界面的按钮显示 根据自己需求设置 verifybutton.backgroundColor = [UIColor grayColor]; NSString *strTime = [NSString stringWithFormat:@"获取验证码(%d)",time]; [verifybutton setTitle:strTime forState:UIControlStateNormal]; verifybutton.titleLabel.textColor = [UIColor whiteColor]; }); time--; } }); dispatch_resume(_timer);
让明天,不后悔今天的所作所为
posted on 2017-03-12 11:44 Sinner_Yun 阅读(278) 评论(0) 编辑 收藏 举报