I had a problem with the splitView so I decided to make my own version of it using a ViewBasedApplication. The view is set up to be like a splitView, but instead of having the static table when you flip it to landscape it will have the popover control like it normally does in the portrait mode.
I have everything set up, but I'm encountering an error when I select an item from the popover table. It isn't updating the view to go to the appropriate page that was selected in the table...the code for the setDetailItem in the ViewController.m file looks like this:
-(void)setDetailTime:(id)newDetailItem{
if(detailitem != newDetailItem) {
[detailitem release];
detailItem = [newDetailItem retain[;
[self configureView];
...
}
The problem is in the [sef configureView] line. it says that "PDFViewController" may not respond to '-configureView'. Im assuming this is because '-configureView' is specific to only the SplitView. Any ideas of a way to workaround this issue?
Thanks!
Your class PDFViewController does not have a configureView method, which is why you're getting the warning (and why you're not seeing anything happen).
You probably need to instead call [self.view setNeedsDisplay] which basically tells the view to redraw itself. I don't know if this will work for you, because I don't know how the rest of your class is written.
Related
So I guess this is going to be closed for being too subjective and too opinion based but if anyone can help me I would appreciate it.
I got a question. If I have a few controllers that all have almost the same thing For example they have the same background, have a menu going around the edge but the actual content is different. I had a couple of ideas. 1) Just have one view controller and just kill the objects for that current view if the user chooses a different option on the menu and spawn the new objects for that menu. My issue with this way was that I could't find a way to use the auto layout with this.
Second way would to be have a function in a .swift file that I can call and it creates an image view and sets up the menu an everything like that. I have the opposite issue here though, now the auto layout won't work.
App devs must have a way of doing this, I'm just probably thinking of this completely the wrong way.
Is there a better way to be doing this - I am sure there is? I would appreciate it if someone could point me in the correct direction.
Thanks
EDIT:
I should make it clear that the language I am using is swift.
You can create custom container view controller and swap the view controllers for the part that change according to the user selection.
--Adding Example--
e.g iPad's Settings app. The left side is a table view and right side is detail view which changes on user selection. So Tableview can be wrapped in a view controller let's say ListViewController. This will not change. The right side will be DetailViewController which would be swapped according to user selection. Your ContainerViewController will have 2 view controllers at all times.
Here is how to add view controllers as child and set their views in objective-c.
- (void) setupContentViewControllerWith: (DetailViewController*) detailViewController andListViewController:(ListViewController*)listViewController {
[self addChildViewController:listViewController];
[self addChildViewController:detailViewController];
listViewController.view.frame = CGRectMake(kListView_X, kListView_Y, kListView_Width, kListView_Height);
detailViewController.view.frame = CGRectMake(kListView_Width, kDetailView_Y, self.view.bounds.size.width, self.view.bounds.size.height-kDetailView_Y);
[self.scrollContainer addSubview:listViewController.view];
[self.scrollContainer addSubview:detailViewController.view];
[self.scrollContainer setContentSize:CGSizeMake(kListView_Width+self.view.bounds.size.width, self.view.bounds.size.height)];
}
When user selects new item from the list, you can swap DetailViewControllers as below
- (void) replaceEpisodeControllerWith:(DetailViewController *)detailViewController {
detailViewController.view.frame = CGRectMake(kListView_Width, kDetailView_Y, self.view.bounds.size.width, self.view.bounds.size.height-kDetailView_Y);
[UIView transitionFromView:currentDetailViewController.view
toView:detailViewController.view
duration:0.0
options:UIViewAnimationOptionTransitionNone
completion:^(BOOL finished)
{
[currentDetailViewController.view removeFromSuperview];
[currentDetailViewController removeFromParentViewController];
[currentDetailViewController release];
currentDetailViewController = detailViewController;
}];
}
I don't have swift version of this.
When I uses Views that are layer backend and have layerUsesCoreImageFilters=YES the first time I use a filter the view 'reinitializes'. Its pretty ugly.
I use a blur filter on a subview, but it causes the complete view to go blank and the reappear.
I am currently on Mavericks (10.9.4)
Anyway is there a standard method to force the initialization at app startup ?
I was able to work around this by setting layerUsesCoreImageFilters on some of my top level views before they were every displayed in awakeFromNib. This caused subsequent calls to setLayerUsesCoreImageFilters on other views to work properly without any drawing issues or flashing views.
Something like this in awakeFromNib:
NSArray *subviews = self.mainView.subviews;
for (NSView *subview in subviews)
{
if ([subview respondsToSelector:#selector(setLayerUsesCoreImageFilters:)])
{
if (!subview.layerUsesCoreImageFilters)
{
[subview setLayerUsesCoreImageFilters:YES];
}
}
}
I am building an App that needs to be able to refresh by pulling, and then re-run the ViewDidLoad.
So I know i could use a UIRefreshControl, but I can only find code that is used in a UITableViewController.
Has anyone got an idea on how to use a UIRefreshControl in a UIView instead of in a UITableView.
Thanks in advance.
try this…
[myView setNeedsDisplay];
this would reload your view controller. you can put this in a method and call it during pull to refresh…Hope this helps you.
Happy coding ;)
Very easily:
Keep the control as amember or property:
UIRefreshControl *_refreshControl;
Add this to your viewDidLoad method: (simply adding the control to your tableView. make sure the tableView is not nil ofcourse).
_refreshControl = [[UIRefreshControl alloc] init];
[_refreshControl addTarget:self action:#selector(refresh:) forControlEvents:UIControlEventValueChanged];
[_tableView insertSubview:_refreshControl atIndex:0];
implement the refresh method:
- (void)refresh:(UIRefreshControl *)refreshControl {
[self reloadData];
//Don't forget to stop the refreshing animation after data reloads.
[_refreshControl endRefreshing];
}
UIRefreshControl isn't meant to be used without a table. This note in the documentation specifically warns against such use:
Note: Because the refresh control is specifically designed for use in a table view that's managed by a table view controller, using it in
a different context can result in undefined behavior.
So although it may be possible to get the control to work, you really shouldn't use it without a table. Rolling your own refresh control is a better solution.
Better still, try to engineer your app such that the user doesn't need to refresh the view. The app should know when new data is available. The only excuse for making the user refresh is if doing so automatically would somehow confuse the user or otherwise make the app more difficult to use.
I'm fairly new to xcode, and am creating a single view application with five views (xib files). I am not using navigation controller or storyboard for two reasons.
If I use Storyboard, I am forced to have my other views be UIView files. These dont have
-(void)viewDidLoad
Which prevents me from loading a few timers I have in my application.
I am able to navigate from the first page to the second and so on, all the way to the fifth page/view with the following code.
-(IBAction)pagethree {
countdown=[[Countdown alloc] initWithNibName:#"Countdown" bundle:nil];
[self.view addSubview:countdown.view];
}
However when I want to go back from the fifth view to the first page I run into a problem.
My first view is called ViewController. If I try the code from above, my app is full of errors.
I also tried using
-(IBAction)back {
[self.view removeFromSuperview];
}
but that only took me back one view.
My fifth view controller is called Statistics and the first one is called ViewController.
What can I code to get from back from the last view to the first?
Thanks
First, to answer your question, you need to do a removeFromSuperview (or similar) for each addSubview: you did. Each time you do addSubview, you're placing your new screen "on top" of the last one, like a stack. When you reach your 5th view, you have 4 other views "behind" it. (Actually, that's not exactly what addSubview does, but I'm just describing the effect in your particular situation).
But I think you're doing it wrong... You should read more about storyboards and navigation controllers. Both are used with UIViewController and support out of the box what you're trying to do by hand. For example, using a navigation controller, to push a new view controller you can do:
[navigationController pushViewController:viewController animated:YES];
You can do that as many times as you want. Then, to go back once, you do:
[navigationController popViewControllerAnimated:YES];
And to go back directly to the first one:
[navigationController popToRootViewControllerAnimated:YES];
Hope this helps.
I have a puzzling problem. Working on a cocoa app in mac os x 10.7.
My app main window contains a split view. In a certain use context in one of the subviews of the split view is loaded a custom view with some labels (nstextfield) and a split view (instantiating a view controller that loads a nib and getting view from that controller). Frame of the custom view is set to split view subview bounds and everything works fine.
Problem is that one of the subviews of the second split view should be loaded (same method: view controller-nib-view-frame/bounds) with a custom view containing a table view and a button, but in this case nothing shows. Everything is done the same way but last custom view is not visible. Any idea?
Thanks
(edit)
this is the code I use to instantiate controller for the view to be added, get the view, and add it as subview to a subview of the split view
- (void)loadSubview {
self.subviewToAddController = [[viewController alloc] initWithNibName:nil bundle:nil];
//nib name is coded in the controller class definition
[[self.subviewToAddController view] setFrame:[self.splitViewContainerSubView bounds]];
//container subView is an outlet
[self.splitViewContainerSubView addSubview:[self.subviewToAddController view]];
}
However I don't think the problem is in this code because if I ask the container subview for its own subviews I can see the new subview is present in the list. It just doesn't show. If I add it as a subview of the split view (a test a just made) or as subview of the subview of the most external split view it is correctly showed too (sorry for the confused explanation, I would need a diagram but in this moment I can't make it)
To elaborate more my doubt (I didn't want to misled so I didn't mention before) can't it be a problem of coordinates, so view is correctly loaded and added as subview but is not visible because hidden by something or showed out of visible area?
(update)
Sorry it took so long to post an update.
After more testing I found out the problem is related to autolayout. No idea what the exact problem is and how to solve it. I ended up turning it off for the nibs the were in troubles and use the old way to set interface objects position and size/resize. Not the best way but for now I can go on.
My best guess is that you didn't set the autoresizing masks of the view properly.