我的行为有些奇怪presentViewController:animated:completion。我所做的本质上是一个猜谜游戏。
我有一个UIViewController(FrequencyViewController) 包含一个UITableView（频率表视图）。当用户点击 QuestionTableView 中包含正确答案的行时，应该实例化一个视图（ CorrectViewController ），并且它的视图应该从屏幕底部向上滑动，作为模态视图。这告诉用户他们有正确的答案，并重置其后面的频率视图控制器，为下一个问题做好准备。当按下按钮时， CorrectViewController 将被关闭以显示下一个问题。
这一切每次都正常工作，只要正确的ViewController的视图就会立即出现presentViewController:animated:completion has animated:NO.
如果我设置animated:YES，正确的ViewController被初始化并调用viewDidLoad。然而viewWillAppear, viewDidAppear，以及来自的完成块presentViewController:animated:completion不被调用。该应用程序只是坐在那里仍然显示 ViewController 频率，直到我第二次点击。现在，viewWillAppear、viewDidAppear 和完成块被调用。
我进行了更多调查，发现这不仅仅是另一次点击就会导致它继续。似乎如果我倾斜或摇动我的 iPhone，这也会导致它触发 viewWillLoad 等。就好像它在等待任何其他用户输入才能进行。这种情况发生在真实的 iPhone 和模拟器中，我通过向模拟器发送摇动命令来证明这一点。
我真的不知道该怎么办......我真的很感激任何人可以提供的帮助。
Thanks
这是我的代码。这很简单...
这是 QuestionViewController 中的代码，充当 QuestionTableView 的委托
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
if (indexPath.row != [self.frequencyModel currentFrequencyIndex])
{
// If guess was wrong, then mark the selection as incorrect
NSLog(@"Incorrect Guess: %@", [self.frequencyModel frequencyLabelAtIndex:(int)indexPath.row]);
UITableViewCell *cell = [self.frequencyTableView cellForRowAtIndexPath:indexPath];
[cell setBackgroundColor:[UIColor colorWithRed:240/255.0f green:110/255.0f blue:103/255.0f alpha:1.0f]];
}
else
{
// If guess was correct, show correct view
NSLog(@"Correct Guess: %@", [self.frequencyModel frequencyLabelAtIndex:(int)indexPath.row]);
self.correctViewController = [[HFBCorrectViewController alloc] init];
self.correctViewController.delegate = self;
[self presentViewController:self.correctViewController animated:YES completion:^(void){
NSLog(@"Completed Presenting correctViewController");
[self setUpViewForNextQuestion];
}];
}
}
这是正确的 ViewController 的全部
@implementation HFBCorrectViewController
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self)
{
// Custom initialization
NSLog(@"[HFBCorrectViewController initWithNibName:bundle:]");
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view from its nib.
NSLog(@"[HFBCorrectViewController viewDidLoad]");
}
- (void)viewDidAppear:(BOOL)animated
{
[super viewDidAppear:animated];
NSLog(@"[HFBCorrectViewController viewDidAppear]");
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (IBAction)close:(id)sender
{
NSLog(@"[HFBCorrectViewController close:sender:]");
[self.delegate didDismissCorrectViewController];
}
@end
Edit:
我很早就发现了这个问题：UITableView和presentViewController需要点击2次才能显示
如果我改变我的didSelectRow对此的代码，它在动画方面工作得非常好......但是它很混乱，并且对于为什么它首先不起作用没有意义。所以我不认为这是一个答案......
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
if (indexPath.row != [self.frequencyModel currentFrequencyIndex])
{
// If guess was wrong, then mark the selection as incorrect
NSLog(@"Incorrect Guess: %@", [self.frequencyModel frequencyLabelAtIndex:(int)indexPath.row]);
UITableViewCell *cell = [self.frequencyTableView cellForRowAtIndexPath:indexPath];
[cell setBackgroundColor:[UIColor colorWithRed:240/255.0f green:110/255.0f blue:103/255.0f alpha:1.0f]];
// [cell setAccessoryType:(UITableViewCellAccessoryType)]
}
else
{
// If guess was correct, show correct view
NSLog(@"Correct Guess: %@", [self.frequencyModel frequencyLabelAtIndex:(int)indexPath.row]);
////////////////////////////
// BELOW HERE ARE THE CHANGES
[self performSelector:@selector(showCorrectViewController:) withObject:nil afterDelay:0];
}
}
-(void)showCorrectViewController:(id)sender
{
self.correctViewController = [[HFBCorrectViewController alloc] init];
self.correctViewController.delegate = self;
self.correctViewController.modalTransitionStyle = UIModalTransitionStyleCrossDissolve;
[self presentViewController:self.correctViewController animated:YES completion:^(void){
NSLog(@"Completed Presenting correctViewController");
[self setUpViewForNextQuestion];
}];
}
