__block int timeout= 59;
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){
dispatch_source_cancel(_timer);
dispatch_async(dispatch_get_main_queue(), ^{
//sendtest为按钮
[sendtest setTitle:@"重新获取" forState:UIControlStateNormal];
[sendtest setTitleColor:BC_MASSTONEATTUNE_COLOR forState:UIControlStateNormal];
sendtest.userInteractionEnabled = YES;
});
}else{
int seconds = timeout % 60;
NSString *strTime = [NSString stringWithFormat:@"%.2d重新获取",seconds];
dispatch_async(dispatch_get_main_queue(), ^{
//sendtest为按钮
[sendtest setTitle:strTime forState:UIControlStateNormal];
[sendtest setTitleColor:BC_TEXTFIELDINPUT_COLOR forState:UIControlStateNormal];
sendtest.userInteractionEnabled = NO;
});
timeout--;
}
});
dispatch_resume(_timer);
