uialertview

问题 Does anyone know in whose subview an active UIAlertView is located or how to find the thread in which it is running? 回答1: If you dump the contents of the windows property and all subviews of all views you can see that the UIAlertView is in a separate window that overlays the main window. Here I have a navbar with a viewcontroller and a tableview (I removed its subviews since they're not relevent). <UIWindow: 0x411fd50; frame = (0 0; 320 480); opaque = NO; autoresize = RM+BM; layer = <CALayer:

问题 Does anyone know in whose subview an active UIAlertView is located or how to find the thread in which it is running? 回答1: If you dump the contents of the windows property and all subviews of all views you can see that the UIAlertView is in a separate window that overlays the main window. Here I have a navbar with a viewcontroller and a tableview (I removed its subviews since they're not relevent). <UIWindow: 0x411fd50; frame = (0 0; 320 480); opaque = NO; autoresize = RM+BM; layer = <CALayer:

问题 I have a method that posts HTTP data and displays a UIAlertView if there is an error. If I have multiple HTTP post I will show multiple UIAlertView for every error. I want to show a UIAlertView only if is not showing other UIAlertView. How can I determine this? 回答1: On the object that calls set an ivar before invoking the show method on your UIAlertView. ... if (!self.alertShowing) { theAlert = [[UIAlertView alloc] initWithTitle:title message:details delegate:self cancelButtonTitle:nil

问题 Also, I would like this UITextView with the text file in XXX.txt.It works fine in iOS6, but content does not appear on the UIAlertview in iOS7. my code is given as below:- UITextView *tosTextView = [[UITextView alloc]initWithFrame:CGRectMake(12, 48, 260, 140)]; NSString *path = [[NSBundle mainBundle] pathForResource:@"TJTermsof Service" ofType:@"txt"]; NSString *content = [NSString stringWithContentsOfFile:path encoding:NSUTF8StringEncoding error:NULL]; [tosTextView setText:content];

问题 Also, I would like this UITextView with the text file in XXX.txt.It works fine in iOS6, but content does not appear on the UIAlertview in iOS7. my code is given as below:- UITextView *tosTextView = [[UITextView alloc]initWithFrame:CGRectMake(12, 48, 260, 140)]; NSString *path = [[NSBundle mainBundle] pathForResource:@"TJTermsof Service" ofType:@"txt"]; NSString *content = [NSString stringWithContentsOfFile:path encoding:NSUTF8StringEncoding error:NULL]; [tosTextView setText:content];

问题 I am making a registration alertview that has a UITextField in it where the user can enter their registration number. everything is pretty much their, however I would like to remove the copy paste function from the textfield programmatically since their is no InterfaceBuilder version of the textfield I have no idea how to do this.. here Is my UIalertview thus far... - (void)pleaseRegisterDevice { UIAlertView *myAlertView = [[UIAlertView alloc] initWithTitle:@"Please Register Device!" message:

问题 If I alloc unit a UIAlertview and then show it. Should I release it after the show or should I autorelease it? 回答1: This is the common way of showing an alert: UIAlertView *alert = [[UIAlertView alloc] initWithTitle: @"Title:" message: @"The Message" delegate: self cancelButtonTitle: @"OK" otherButtonTitles: nil]; [alert show]; [alert release]; 回答2: Release it after the show. It will retain itself until no longer needed. 回答3: It is good programming style to release it manually. Autorelease

问题 In my app, a lock screen is used. Sometimes a UIAlertView is shown, now when the user sends the app to the background and brings it in front again, the UIAlertview is shown above the lock screen. Is there a possibility to add a UIViewController 's view above everything, i.e. above the UIAlertView ? 回答1: You should have like this UIWindow *mySpecialWindowForLockScreen = [[UIWindow alloc]initWithFrame:[[UIScreen mainScreen] bounds]]; //"Hey iOS Please put this window above all alert view"

问题 I am trying to create a UIAlertView that has 3 options and no "cancel" button, but when I do this, it always styles "Button 3" as a cancel button. Is there any way to avoid this? UIAlertView *alertView= [[UIAlertView alloc] initWithTitle:@"Select One" message:nil delegate:self cancelButtonTitle:nil otherButtonTitles:@"Button 1",@"Button 2", @"Button3", nil]; 回答1: This is a post about how to change the position of the cancel button. Also, if you have only 1 button in the UIAlertView , then

问题 Lets say I have multiple View controller classes using the same UIAlertView *alertView. *alertView's delegate is set to a centralized delegate. I do this because would like to use the .tag to do different things based on it. The question is every time I invoke an alert view or dismiss it, what do i have to do to prevent a memory leak? Should I not release every time? Or is this a very bad idea? Thanks. 回答1: A UIAlertView may be "shown" from anywhere in your app. I have an app that the main