I am trying to imitate an alert view and i show a view with two text fields above a view with a translucent background. The problem is that when i try to tap on the text fields , the keyboard is shown behind my translucent view and i can't tap it no more. Is there a solution?
Here is my code:
if (_grayView==nil) {
_grayView = [[UIView alloc]init];
_grayView.frame = [[UIScreen mainScreen]bounds];
_grayView.backgroundColor = [UIColor blackColor];
_grayView.alpha = 0.7;
[[[[UIApplication sharedApplication] windows] lastObject] addSubview:_grayView];
}
//Show the dimensions view when choosing an image
_dimensionsView.hidden = NO;
[[[[UIApplication sharedApplication] windows] lastObject] addSubview:_dimensionsView];
In the _dimensionsView i have the textfileds.
What you're doing isn't a very good idea to begin with. Also be aware that you can't count on windows.lastObject to always be the window you expect. iOS 7 and 8 are more and more liberal with creating new windows for keyboards and modals. You might not be adding your subview to the window you're expecting.
Related
In my iOS app I need to display custom content on external display (using AirPlay) as well as mirroring some screens on TV.
For presenting custom content I use code from Multiple Display Programming Guide for iOS and it works well: while my iPad is in 'mirror' AirPlay mode I'm able to show some stuff on the TV. However, documentation says6
To re-enable mirroring after displaying unique content, simply remove the window you created from the appropriate screen object.
And this part isn't working at all. I just cannot destroy my window that I use to display content on external screen. Here's the code:
- (void) destroySecondWindow{
if (secondWindow){
for( UIView* view in secondWindow.subviews ){
[view removeFromSuperview];
}
secondWindow.backgroundColor = [UIColor clearColor];
secondWindow.hidden = YES;
// Hide and then delete the window.
[secondWindow removeFromSuperview];
secondWindow = nil;
}
}
As far as unique content should be displayed only when one particular view controller is visible, I'm trying to destroy external window like this:
- (void) viewWillDisappear:(BOOL)animated{
[self destroySecondWindow];
}
Here's how I create second window:
- (void) createSecondWindowForScreen:(UIScreen*)screen{
if( screen == nil || secondWindow != nil ){
return;
}
CGRect screenBounds = screen.bounds;
secondWindow = [[UIWindow alloc] initWithFrame:screenBounds];
secondWindow.backgroundColor = [UIColor blueColor];
secondWindow.screen = screen;
[secondWindow setHidden:NO];
}
So the question is: does anybody know how to re-enable screen mirroring after displaying unique content on TV?
Thanks in advance!
I'm using TheSidebarController to implement add a sliding menu into an iOS application. This is the library I'm using, but I've found the same issue in other libraries, like ECSlidingViewController, etc. They essentially work by adding multiple view controllers onto a containing view controller, nothing too crazy.
The issue is, when you make the app a landscape app, all the screens in the container- the menu, the content screen- seem to think they're in portrait mode, and get cut off half way. You can see the issue in this screenshot where the table is cut off:
http://imgur.com/xD5MUei
I've been trying to get this to work in any way I can, and no luck.
The library I'm using + example project can be found here:
https://github.com/jondanao/TheSidebarController
Any help is greatly appreciated :)
EDIT: people are saying I can stretch the table out to make it look normal, but this just masks the underlying problem, which is the app and/or the screens still think they're in portrait orientation. As a quick example, if I take the example project, and in LeftViewController substitute the following code:
- (void)dismissThisViewController
{
UIViewController* vc = [[UIViewController alloc] init];
UINavigationController* pulldown = [[UINavigationController alloc] initWithRootViewController:vc];
pulldown.view.frame = CGRectMake(pulldown.view.frame.origin.x, -[[UIApplication sharedApplication] delegate].window.frame.size.height,
pulldown.view.frame.size.width, pulldown.view.frame.size.height);
[[[UIApplication sharedApplication] delegate].window addSubview:pulldown.view];
[UIView animateWithDuration:.5 animations:^{
pulldown.view.frame = CGRectMake(pulldown.view.frame.origin.x, 0,
pulldown.view.frame.size.width, pulldown.view.frame.size.height);
} completion:^(BOOL finished) {
;
}];
}
The viewcontroller comes in sideways, not from the top.
This was a strange one... I had to set the frame of the content view controller, which made sense, but then I had to reset it every time the content was refreshed:
- (void)setContentViewController:(UIViewController *)contentViewController
{
// Old View Controller
UIViewController *oldViewController = self.contentViewController;
[oldViewController willMoveToParentViewController:nil];
[oldViewController.view removeFromSuperview];
[oldViewController removeFromParentViewController];
// New View Controller
UIViewController *newViewController = contentViewController;
[self.contentContainerViewController addChildViewController:newViewController];
[self.contentContainerViewController.view addSubview:newViewController.view];
[newViewController didMoveToParentViewController:self.contentContainerViewController];
_contentViewController = newViewController;
if ([DeviceDetection isDeviceiPad]) {
_contentViewController.view.frame = CGRectMake(0, 0, 1024, 768);
}
}
Did you check if it's has something to do with the new interface orientation?
https://developer.apple.com/library/ios/releasenotes/General/WhatsNewIniOS/Articles/iOS8.html
chapter -> Supporting New Screen Sizes and Scales
In CenterViewController.h make the class a subclass of a UITableViewController instead.
Then comment out [self.view addSubview:self.tableView]; in CenterViewController.m.
Done!
In centerViewController.m, when you create the tableview, add this line:
self.tableView.autoresizingMask = UIViewAutoresizingFlexibleWidth;
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?
You should have like this
UIWindow *mySpecialWindowForLockScreen = [[UIWindow alloc]initWithFrame:[[UIScreen mainScreen] bounds]];
//"Hey iOS Please put this window above all alert view"
mySpecialWindowForLockScreen.windowLevel = UIWindowLevelAlert+100;
UIViewController *lockScreenViewController = [[UIViewController alloc]init];//Lock Screen
lockScreenViewController.view.frame = mySpecialWindowForLockScreen.bounds;
mySpecialWindowForLockScreen.rootViewController = lockScreenViewController;
// In lockScreenViewController view you can add lock screen images and other UI stuff
mySpecialWindowForLockScreen.rootViewController.view.backgroundColor = [UIColor greenColor];
[mySpecialWindowForLockScreen makeKeyAndVisible];
Whenever you want to hide the LockScreen window then simply hide it by setHidden:YES.
There are three kind of UIWindowLevel, the biggest one will be shown above the other window.
So I suggest you use a UIWindow to create your lock screen and let it's window level bigger than UIWindowLevelAlert,
Basically, their values are :
UIWindowLevelNormal = 0.000000;
UIWindowLevel UIWindowLevelAlert = 2000.000000;
UIWindowLevel UIWindowLevelStatusBar = 1000.000000;
so that's why the alert view will show above the other window.have a try.
I currently have a particle view connected to storyboard. The problem that I'm facing is that I'm displaying an alert at the same time I show this view, and the alert is always shown in front of the particle view. Is there a way where I can always place the particle view in front? I'm using a third party alert library titled SIAlertView, so I'm assuming it may be possible.
I've logged the zPosition of the alertView and it's always 0, so I set the zPosition of my particle view's layer to 10, but it is still shown beneath the alert view.
Here's the storyboard hierarchy:
I do not know about SIAlertView but normal UIAlertView is shown via separate window. If you want to overlap it you can not do it by changing zpozition, you have to also use a separate window:
// do not forget to keep strong reference for it somewhere!
UIWindow *notificationWindow;
//your frame here!
notificationWindow = [[UIWindow alloc] initWithFrame: some_cgrect];
notificationWindow.backgroundColor = [UIColor clearColor]; // your color if needed
notificationWindow.userInteractionEnabled = NO; // if needed
// IMPORTANT PART!
notificationWindow.windowLevel = UIWindowLevelAlert + 1;
notificationWindow.rootViewController = [UIViewController new];
notificationWindow.hidden = NO; // This is also important!
UPDATE:
To overlap also a status bar use
notificationWindow.windowLevel = UIWindowLevelStatusBar;
to dismiss UIWindow just invalidate strong pointer to it. Something like:
self.strongPointerToYourWindow = nil;
Can I have some UIView which will always appear on top in iOS?
There are lots of addSubview in my project but I need to have one small view which will always appear. SO is there any other option than
[self.view bringSubViewToFront:myView];
Thanks
One more option (especially if you want to overlap several screens, with logo for example) - separate UIWindow. Use windowLevel to set the level of new window.
UILabel *devLabel = [UILabel new];
devLabel.text = #" DEV ";
devLabel.font = [UIFont systemFontOfSize:10];
devLabel.textColor = [UIColor grayColor];
[devLabel sizeToFit];
CGSize screenSize = [[UIScreen mainScreen] bounds].size;
static UIWindow *notificationWindow;
notificationWindow = [[UIWindow alloc] initWithFrame:
CGRectMake(screenSize.width - devLabel.width, screenSize.height - devLabel.height,
devLabel.width, devLabel.height)];
notificationWindow.backgroundColor = [UIColor clearColor];
notificationWindow.userInteractionEnabled = NO;
notificationWindow.windowLevel = UIWindowLevelStatusBar;
notificationWindow.rootViewController = [UIViewController new];
[notificationWindow.rootViewController.view addSubview:devLabel];
notificationWindow.hidden = NO;
Another option is set layer.zPosition of your UIView.
You need to add
#import <QuartzCore/QuartzCore.h>
Framework to your .m file.
And set such like
myCustomView.layer.zPosition = 101;// set maximum value as per your requirement.
For more information about layer.zPosition read this documentation.
Discussion
The default value of this property is 0. Changing the value of this property changes the the front-to-back ordering of layers onscreen. This can affect the visibility of layers whose frame rectangles overlap.
The other option is to add other subviews below this always-on-top subview. For example:
[self.view insertSubview:subview belowSubview:_topSubview];
There's no solution with Interface Builder if you search for this kind. It should be done programmatically. If you don't want to use bringSubviewToFront: everytime, just insert other subviews below this one.
Many times your view did not appear in viewDidLoad or, if your view comes from parentViewController (for example in many transitions like modal segue..) your can see parentViewController only in viewDidAppear so:
Try to put bringSubviewToFront in :
-(void)viewDidAppear:(BOOL)animated {
[super viewDidAppear:animated];
[self.view bringSubViewToFront:myView];
// or if your view is attached in parentViewController
[self.parentViewController.view bringSubViewToFront:myView];
}
Good luck!