I have an iPad app (XCode 5, iOS 7, Storyboards and ARC). I have a UIPopover created in a UIViewController, and when I tap a button it correctly displays the popover.
Now, I want to draw a grid in that popover; I know I have to add code to drawRect do do the drawing, and do a setNeedsDisplay to get the drawing done. However, it's not working!
My question is why is drawRect not being called when from [popoverView setNeedsDisplay]; ? Both methods are in the same UIViewController class.
Here is the code that is supposed to call the drawRect
// create popover
UIViewController* popoverContent = [[UIViewController alloc] init];
UIView *popoverView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 650, 416)];
popoverView.backgroundColor = [UIColor whiteColor];
popoverContent.preferredContentSize = CGSizeMake(650.0, 416.0);
// draw the lines, etc on the popoverContent
[popoverView setNeedsDisplay];
// create the popover controller and attach the popover content to it
popoverController = [[UIPopoverController alloc] initWithContentViewController:popoverContent];
popoverController.delegate = (id)self;
[popoverController setPopoverContentSize:CGSizeMake(650, 416) animated:NO];
[popoverController presentPopoverFromRect:CGRectMake(650, 416, 10, 50) inView: obViewOpenAppts
permittedArrowDirections:UIPopoverArrowDirectionUp animated:YES];
I have a breakpoint in drawRect so I know it's not being called.
What am I doing wrong?
drawRect: is a UIView method, not a UIViewController method. If you want to override it you have to subclass UIView, and then create it like this:
MyUIViewSubclass *popoverView = [[MyUIViewSubclass alloc] initWithFrame:CGRectMake(0, 0, 650, 416)];
Related
So I have a tableview inside a UIPopOverController and I attached a UISearchBar to the header of the tableview and I have the UISearchDisplayController displaying the correct results. However, I can't get the results to display within the UIPopoverController window. It's displaying behind the popover view into the DetailView covering half the screen (SplitViewController for iPad). How do I bring the results/tableview into the popover view? I tried adding the searchTableView to the popover view, but it just covers up the original tableview.
Here is the code of setting this up:
//Initialize Popover Controller
UIView *ccPopoverView = [[UIView alloc] init];
UIViewController* popoverTableContent = [[UIViewController alloc] init];
self.ccTableView = [[UITableView alloc] initWithFrame:CGRectMake(0, 44, 320, 400) style:UITableViewStylePlain];
self.ccTableView.dataSource = self;
self.ccTableView.delegate = self;
self.searchBar = [[UISearchBar alloc] initWithFrame:CGRectMake(0, 0, 320.0, 44.0)];
self.searchDisplayController = [[UISearchDisplayController alloc]initWithSearchBar:self.searchBar contentsController:self];
self.searchDisplayController.searchResultsDataSource = self;
self.searchDisplayController.searchResultsDelegate = self;
self.searchDisplayController.delegate = self;
searchBar.frame = CGRectMake(0, 0, 0, 38);
self.ccTableView.tableHeaderView = searchBar;
ccPopoverView.backgroundColor = [UIColor blackColor];
//Here is where I tried adding the searchResultsTableView as a subview.
//[ccPopoverView addSubview:self.searchDisplayController.searchResultsTableView];
[ccPopoverView addSubview:self.ccTableView];
popoverTableContent.view = ccPopoverView;
self.popoverTableController.delegate = self;
self.popoverTableController = [[UIPopoverController alloc] initWithContentViewController:popoverTableContent];
[self.popoverTableController setPopoverContentSize:CGSizeMake(320, 440) animated:NO];
Thanks!
I fixed the issue instead of adding self when I initialized the search bar, I needed to put in the popovercontroller as the initialization.
I have 2 ViewControllers and I create one UIImageView to show like Splash Screen on IPhone. I write it in TestAppDelegate.m :
====================
splashScreen = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 320, 480)];
splashScreen.image = [UIImage imageNamed:#"Default.png"];
[self.window addSubview:splashScreen];
sleep(6);
[splashScreen removeFromSuperview];
====================
My question is,
if I touch on this imageview I will go to 2nd ViewController.
else after time sleep, automatically to 1st ViewController.
So, it's possible to do that ?
Do this:
Add UIGestureRecognizerDelegate in appDelegate.h file.
#interface AppDelegate : UIResponder <UIApplicationDelegate,UIGestureRecognizerDelegate>
Now
splashScreen = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 320, 480)];
splashScreen.userInteractionEnabled = YES;
splashScreen.image = [UIImage imageNamed:#"Default.png"];
UITapGestureRecognizer* tapRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(handleTap:)];
tapRecognizer.numberOfTapsRequired = 1;
tapRecognizer.numberOfTouchesRequired = 1;
tapRecognizer.delegate = self;
[splashScreen addGestureRecognizer:tapRecognizer];
[tapRecognizer release];
[self.window addSubview:splashScreen];
sleep(6);
[splashScreen removeFromSuperview];
//add ViewController1 here
ViewController1 *objViewController1 = [[ViewController1 alloc]initWithNibName:#"ViewController1" bundle:nil];
[self.window addSubview:objViewController1.view];
Now handler will be called when tapped on splash screen
- (void)handleTap:(UITapGestureRecognizer*)recognizer
{
// Do Your thing.
if (recognizer.state == UIGestureRecognizerStateEnded)
{
[splashScreen removeFromSuperview]; //edited here
ViewController2 *objViewController2 = [[ViewController2 alloc]initWithNibName:#"ViewController2" bundle:nil];
[self.window addSubview:objViewController2.view];
}
}
Yes. It's possible.In AppDelegate keep NSTimer.
In the selector of timer write code to push to the 1st view controller.
And put a Touch Recognizer on the imageview and on the touch event write code to push to the 2nd View Controller.
Here is the code:
CGRect myImageRect = CGRectMake(0, 0, 100, 100);
UIImageView *myImage = [[UIImageView alloc] initWithFrame:myImageRect];
[myImage setImage:[UIImage imageNamed:#"Angry0.png"]];
[mainView addSubview:myImage];
Angry0.png is in my Resources folder. No image is display on simulator.
Right... You need to initalize all your views...
If I'm right your view hierarchy is this:
-mainView
-contentView
-scrollView
-imageView
So somewhere when you load mainView you also need to initalize all the child views...
For example:
...
//put this where you call mainView = [[UIView alloc] init...
contentView = [[UIView alloc] init...
//config the contentView
scrollView = [[UIScrollView alloc] init...
//config the scrollView
....
Now, providing that you correctly set your views frames and initialized them they shouldn't be null...
You can check by calling:
if (!scrollView) {
NSLog(#"scrollView is null :(");
}
Then you should be able to call your existing code and all should be good
I'm trying to create a popover with the following code:
//.h
#interface LoginViewController : UIViewController <UIPopoverControllerDelegate>
....
#end
//.m
- (IBAction)popoverTest:(id)sender
{
UIViewController *popoverContent = [[UIViewController alloc] init];
UIView *myView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 300, 300)];
UILabel *nameLabel = [[UILabel alloc] init]; //edited, fixed UILabel allocation
nameLabel.text = #"Person's name";
[nameLabel sizeToFit];
nameLabel.frame = CGRectMake(10, 10, nameLabel.frame.size.width, nameLabel.frame.size.height);
[myView addSubview:nameLabel];
popoverContent.view = myView;
popoverContent.contentSizeForViewInPopover = CGSizeMake(300, 300);
UIPopoverController *popoverController = [[UIPopoverController alloc] initWithContentViewController:popoverContent];
popoverController.delegate = self;
[popoverController presentPopoverFromRect:((UIButton *)sender).frame inView:self.view permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES];
NSLog(#"ran all code");
}
I created a UIView, put a label as a subview and then assigned my view to the UIViewController.view. Then I created a popover controller, sized the popover controller, set the delegate and presented it from the button's frame.
I receive a SIGABRT and the app crashes.
Is there something I'm missing?
EDIT: I fixed the UILabel allocation. The problem is always there.
Your code is quite strange.
For example why do you create a view and do you add it to the content view of your popover?
Then, you have to make attention to memory leaks. There a lot of them in your code.
That said, here a simple example for display a UIViewcontroller within a UIPopoverController.
- (IBAction)yourAction:(id)sender
UIButton* senderButton = (UIButton*)sender;
UIViewController* yourController = [[UIViewController alloc] init];
UIPopoverController* pop = [[UIPopoverController alloc] initWithContentViewController:yourController];
pop.delegate = self;
pop.popoverContentSize = CGSizeMake(300, 300);
self.popover = pop;
[pop presentPopoverFromRect:senderButton.bounds inView:senderButton permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES];
pop.passthroughViews = nil;
[yourController release];
[pop release];
}
where self.popover is a #property with a retain policy. In this manner in UIPopoverControllerDelegate methods (or wherever you want), you can release your popover and/or dismiss it.
Hope it helps.
P.S. Check the code because I've written by hand.
Edit
Usually when you create a popover, its content view controller is or a custom UIViewController or a UINavigationController (in this case you want to take advantage of its navigation bar).
For example, instead of the simple UIViewController, you could create a custom one
//.h
#interface CustomUIViewController : UIViewController
#end
//.m
#implementation CustomUIViewController
// other code here...
- (void)viewDidLoad
{
// here you are sure that the view has been loaded in memory (alternatively override loadView method), so
UIView* greenView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 300, 300)];
green.backgroundColor = [UIColor greenColor];
[self.view addSubview:greenView];
[greenView release];
}
#end
and use it within a a popover
- (IBAction)yourAction:(id)sender
UIButton* senderButton = (UIButton*)sender;
CustomUIViewController* yourController = [[CustomUIViewController alloc] init];
// same as before...
}
solved my issue from this question.
short answer: ARC doesn't retain the UIPopoverController.
i made it an instance variable and works just fine.
The problem seems to be the following:
UILabel *nameLabel;
nameLabel.text = #"Person's name";
nameLabel is uninitialized. It points to random memory, and when calling -setText: through the text-property, your application crashes.
Apart from this, you have a few memory leaks. Remember: If you call alloc, you have to release it somewhere.
(I'm not sure how this works with the new automatic alloc/release).
In this code example, i am trying to produce the following view hierarchy
Window -> background image -> scroll view -> text view
All i see however is
Window -> background image
What am i missing please?
-(void) viewWillAppear:(BOOL)animated {
UIScrollView *scrollWindow = [[UIScrollView alloc]
initWithFrame:CGRectMake(30, 30, 440, 212)];
UITextView *scrollableText = [[UITextView alloc] init];
[scrollableText setEditable:NO];
[scrollableText setText:#"Why, hello there"];
[scrollWindow addSubview:scrollableText];
UIImage *backgroundImage = [[UIImage alloc] initWithCGImage:
[UIImage imageNamed:#"about_bg.png"].CGImage];
UIImageView *backgroundView = [[UIImageView alloc]
initWithImage:backgroundImage];
[backgroundView addSubview:scrollWindow];
[[self view] addSubview:backgroundView];
}
Andrew is right about not making the scroll view a subview of the background UIImageView view. But the scroll view is invisible. Only its content (scrollableText) will show. And you haven't set scrollableText's frame, so it's effectively invisible too. Init like so:
[scrollableText setEditable:NO];
[scrollableText setText:#"Why, hello there"];
[scrollableText setFrame:CGRectMake(0, 0, 100, 100)];
And you should see it.
What you need is this hierarchy:
Window
background image view
scroll view
text view
Try adding two subviews to your window, not shove them all as subviews into each other.''-
- (void) viewWillAppear:(BOOL)animated {
UIScrollView *scrollWindow = [[UIScrollView alloc] initWithFrame:CGRectMake(30, 30, 440, 212)];
UITextView *scrollableText = [[UITextView alloc] init];
UIImageView *backgroundView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:#"about_bg.png"]];
scrollableText.editable = NO;
scrollableText.text = #"Why, hello there";
[scrollWindow addSubview:scrollableText];
[self.view addSubview:backgroundView];
[self.view addSubview:scrollWindow];
}