当我第一次从调度队列调用下面的代码时,完成块没有调用。UIView动画完成块未调用
- (void)viewDidLoad
{
[super viewDidLoad];
dispatch_queue_t initialize_queue;
initialize_queue = dispatch_queue_create("init", NULL);
dispatch_async(initialize_queue, ^{
_onInit = YES;
_isRunning = NO;
[self startProgress];
_onInit = NO;
});
}
- (void)startProgress
{
if (!_isRunning) {
_isRunning = YES;
NSLog(@"Starting");
[UIView animateWithDuration:0.5 animations:^{
self.progressStatusButton.hidden = NO;
self.activityLeftConstraint.constant = _activityLeftSpace;
self.activityWidthConstraint.constant = _activityWidth;
self.buttonWidthConstraint.constant = _progressStatusButtonWidth;
self.buttonLeftConstraint.constant = _progressStatusButtonLeftSpace;
self.activityView.alpha = 1.0;
}completion:^(BOOL finished){
NSLog(@"Start Animating");
[self.activityView startAnimating];
}];
}
}
当我删除dispatch_aync
方法和在执行viewDidLoad
方法startProgress
,
完成块调用。我应该如何纠正我的代码?
我试图改变dispatch_async
使用dispatch_async(dispatch_get_main_queue(),..)
,
然后完成块调用,但我想异步执行startProgress
方法。
请让我知道。
也许你可以把dispatch_async(initialize_queue ... – Wonil