@property (nonatomic, assign) NSInteger timeout;
UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
button.frame = CGRectMake(100, 100, 200, 100);
[button setTitle:@"跳转" forState:UIControlStateNormal];
[button setTitleColor:[UIColor redColor] forState:UIControlStateNormal];
[button setTitleColor:[UIColor grayColor] forState:UIControlStateSelected];
[button addTarget:self action:@selector(click:) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:button];
- (void)click:(UIButton *)btn{
[self countdownButton:btn timeout:59];
}
- (void)countdownButton:(UIButton*)button timeout:(NSInteger)totalTime
{
// __block int timeout = totalTime;
_timeout = totalTime;
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);
dispatch_source_set_event_handler(_timer, ^{
if(_timeout <= 0) {
dispatch_source_cancel(_timer);
dispatch_async(dispatch_get_main_queue(), ^{
button.selected = NO;
button.userInteractionEnabled = YES;
});
}
else {
int seconds = _timeout % 60;
button.selected = YES;
button.userInteractionEnabled = NO;
NSString *strTime = [NSString stringWithFormat:@"%d 秒后重新获取",seconds];
dispatch_async(dispatch_get_main_queue(), ^{
[button setTitle:strTime forState:UIControlStateSelected];
});
_timeout--;
}
});
dispatch_resume(_timer);
}