學(xué)習(xí)別人的一個(gè)方便快捷的倒計(jì)時(shí)實(shí)現(xiàn)?
__block int timeout = time; //倒計(jì)時(shí)時(shí)間
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); //每秒執(zhí)行
dispatch_source_set_event_handler(_timer, ^{
if(timeout <= 0){ //倒計(jì)時(shí)結(jié)束鹦赎，關(guān)閉
dispatch_source_cancel(_timer);
dispatch_async(dispatch_get_main_queue(), ^{
//設(shè)置界面的按鈕顯示根據(jù)自己需求設(shè)置
//[self.phoneLoginVC.sendCode setTitle:@"發(fā)送驗(yàn)證碼" forState:UIControlStateNormal];
//self.phoneLoginVC.sendCode.userInteractionEnabled = true;
});
}else{
int seconds = timeout % 61;
NSString *strTime = [NSString stringWithFormat:@"%.2d", seconds];
dispatch_async(dispatch_get_main_queue(), ^{
//設(shè)置界面的按鈕顯示根據(jù)自己需求設(shè)置
[UIView beginAnimations:nil context:nil];
[UIView setAnimationDuration:1];
//[self.phoneLoginVC.sendCode setTitle:[NSString stringWithFormat:@"%@秒",strTime] forState:UIControlStateNormal];
[UIView commitAnimations];
//self.phoneLoginVC.sendCode.userInteractionEnabled = false;
});
timeout--;
}
});
dispatch_resume(_timer);
