dismissModalViewControllerAnimated不總是有效？

Question

防止模式視圖控制器被解僱的原因是什麼？我發現dismissModalViewControllerAnimated並不總是工作？例如，這將不起作用：

SettingsViewController* settings = [[SettingsViewController alloc] init]; 
UINavigationController *settingsNav = [[UINavigationController alloc] initWithRootViewController:settings]; 
[navigationController presentModalViewController:settingsNav animated:YES];  
[navigationController dismissModalViewControllerAnimated:YES]; 

謝謝！

Answer 1

如果您嘗試將太多的導航動畫放在一起太靠近，它們通常不起作用。嘗試做你的dismissModalViewControllerAnimated：延遲0.75秒後。

Answer 2

SettingsViewController* settings = [[SettingsViewController alloc] init]; 
UINavigationController *settingsNav = [[UINavigationController alloc] initWithRootViewController:settings]; 
[navigationController presentModalViewController:settingsNav animated:YES]; 
[settingsNav dismissModalViewControllerAnimated:YES]; 

如果SettingsViewController它的UIViewController則：

SettingsViewController* settings = [[SettingsViewController alloc] init]; 
[self presentModalViewController:settings animated:YES]; 
[settings dismissModalViewControllerAnimated:YES];