In my view i added 4 UIButtons at bottom (something like tab bar application) and when I click on any button I added their respective subviews through add subview method , and when user click on another button a new subview is added on that view and so on. I am sure this is not a right way to do this task.
so kindly suggest the way i could handle this situation while taking memory management into consideration.
This can be done in two ways :
Add subview and then remove old subview when click on other button
Add all subview first time and then show and hide them.
This is the proper way for memory management.
You can use UIViewController Containment,
The best thing I have found so far is the WWDC 2011 Session Video
Session 102 - Implementing UIViewController Containment.
Container View Controller Examples
Related
I have a main viewController containing three separate childViewControllers. I would like to present one of them fullscreen after tapping, but I could not find any elegant way to present an already active viewController.
Would you propose any ideas on how to make such transition?
Is there a way to reuse the childViewController without creating new instance?
Without seeing any screenshots, I would recommend changing the main view controller to be its own view controller (maybe with buttons and views separating it into 3 sections), and then after clicking a button -> go to childViewController.
I've found that for easy transitions like this, the Hero cocoapod is super easy to use and UI friendly.
Check out the Hero cocoa pod here
Good luck!
I have two subviews that load. One is a tabbar thats inside a viewcontroller which gets loaded fairly early on and the second is a view that appears when a tab bar item is pressed.
however when this subview is added it loads over the tabbar subview.. is there a way to bring to front or something along those lines?
There is a whole plethora of methods to choose from...see the section Managing the View Hierarchy in the UIView docs
I am trying to mimic iOS 5's notification view (when you swipe down the view appears) for hub with a left swipe in my view. I created a mimic for a single view controller by adding the hubview as subview and changing the origin of view when making swipe. But With this approach I have to add it to every view I implement in my app. I want to add it to UIViewController as a category. I am not sure how to proceed at this point.
If you don't want every viewController to have to handle the menu then I would suggest having a root viewController that acts like a container. It has a subview that displays the content from your various view controllers and it also has the controls for your menu and any other overlay information you may want to provide.
A category won't work in this case but subclassing will. Just ensure that all of your view controllers are sub classes of the view controller with this functionality implemented.
I have a main view with a UINavigationController and a subview (both added through interface builder). I have a UIBarButtonItem in the navigation toolbar. When that button is clicked, I want a popover view to come up (with a table format) with options for different subviews to choose from. When a user chooses one of the subviews (by clicking a cell), the popover should fade away and the subview should change to the user's chosen view.
Those view options should be loaded from separate xib files.
I know it's a relatively complicated question, but what is the best way to do this?
I don't necessarily need code, but that would be helpful. Thanks guys!
Check this tutorial about the popOvers:
http://mobiforge.com/designing/story/using-popoverview-ipad-app-development
Are you looking for something similar to this?
Checkout the – loadNibNamed:owner:options: of NSBundle(UINibLoadingAdditions). Your view will be the first index object of the returned array commonly.
I'd like to display some small tutorial dialogs on top of my exiting views. I want to be able to see my existing views behind these smaller views.
Do I have to use view controllers in the same I way I would me normal views, and presentmodalviewcontroller etc ?
I haven't tried making a smaller view in interface builder before.
Also, say I want to move to another one of my existing views, full screen, while in my tutorial view. How would I close my tutorial view move to the next full screen view and launch another tutorial view ?
Example code or pseudo code would be welcome.
If your tutorial dialogs are just text, you could use UIAlertView to show the information to the user, so they can just read it and click the OK button when they're done. It's a very easy way to show some text to the user.
If you need to include images or other interactive items in your tutorial dialogs, the easiest way might be for you to just have your fullscreen view's view controller create a new view and put it up. So in this case, you'd create your view in Interface Builder, and when you want to show it, instantiate it using -[UIBundle loadNibNamed:owner:options:] and add it as a subview of your main view. Of course, it may even be easier to create the tutorial view programmatically from your view controller rather than using a nib for them at all.
Regarding the question of moving on to another fullscreen view, you would probably want to look into embedding your view controllers in a UINavigationController. This would allow you to push from the first controller to the second very easily, and the user would be able to just tap the Back button to get back to the first. If you're not looking for a navigation bar type of interface, you could present the second view controller as a modal view controller by calling -[UIViewController presentModalViewController:animated:] on your main view controller. This will pop up the second view controller fullscreen, and the user can dismiss it when they're done. Check out Apple's great documentation on UINavigationController to get a feel for how to use that:
http://developer.apple.com/library/ios/#featuredarticles/ViewControllerPGforiPhoneOS/NavigationControllers/NavigationControllers.html%23//apple_ref/doc/uid/TP40007457-CH103-SW1
I would think that you could use existing UIViewController and simply add a new UIView that is of desired dimensions, that sits in front of other views and which is non-opaque and has alpha less than 1.
If you want a general purpose tutorial mechanism that can be placed atop any one of many UIViewControllers, then you would want to extract the navigation logic, etc.
Sorry, no code - just a few quick thoughts.