2014/10/15 下午 10:15:29

iphone Programming Glossary: unloaded

viewDidLoad is in fact called every time there is a segue transition

http://stackoverflow.com/questions/11969452/viewdidload-is-in-fact-called-every-time-there-is-a-segue-transition

http www.manning sandbox.com thread.jspa threadID 41506 And apples own documentation indicate that a view is only unloaded when memory is low. I am currently doing initialisation in viewDidLoad making the assumption that it is called with every..

UISearchDisplayController with no results tableView?

http://stackoverflow.com/questions/1214185/uisearchdisplaycontroller-with-no-results-tableview

the keyboard. The searchDisplayController's delegate gets called when this second UITableView is loaded shown hidden unloaded. Usually it shows live search results or autocompletion entries while typing. In my app I want to search a webservice and..

Description of initWithNibName, awakeFromNib and viewDidLoad?

http://stackoverflow.com/questions/1240010/description-of-initwithnibname-awakefromnib-and-viewdidload

can still put all the initialization in viewDidLoad . This is often better because if your view ends up getting cached unloaded and then brought back onto the screen viewDidLoad can be called again while your initializer wouldn't necessarily be. For..

What happens if I don't retain IBOutlet?

http://stackoverflow.com/questions/1250518/what-happens-if-i-dont-retain-iboutlet

declare the memory management behavior on the property there is no mystery as to what is going on. If the view gets unloaded but you used a property that was declared as retain you've still got a valid reference to your textfield. Perhaps a more.. is no longer in the foreground. In the case of a memory warning the view of this offscreen view controller will be unloaded. At this point the view property of the top level UIView will be nulled out it will be released and deallocated. Because..

iOS 6 - viewDidUnload migrate to didReceiveMemoryWarning?

http://stackoverflow.com/questions/12674268/ios-6-viewdidunload-migrate-to-didreceivememorywarning

being recreated in viewDidLoad again when you pop back because that will not be called since the view itself was never unloaded . As applefreak says it depends upon what you were doing in viewDidUnload . If you update your question with explicit examples..

When is UIViewController viewDidUnload called?

http://stackoverflow.com/questions/1285932/when-is-uiviewcontroller-viewdidunload-called

by default are registered for memory warning notifications and any view that is not currently being used will be unloaded by the view controller the viewDidUnload method is there so that you can clean up anything else you would like to save extra.. memory or if you've retained some IBOutlets to help free up memory that would otherwise be released by the view being unloaded . Generally any IBOutlets you release in dealloc should also be released and references set to nil in this method. share..

What exactly must I do in viewDidUnload?

http://stackoverflow.com/questions/2261972/what-exactly-must-i-do-in-viewdidunload

release that stuff only HERE but not in dealloc as well That's confusing. Also what if dealloc causes the view to be unloaded released Then again it will call viewDidUnload I do realize the difference that viewDidUnload is just for the case where.. your viewDidLoad method. As you pointed out the viewDid ... methods are to be used when the view itself is loaded and unloaded. This permits a usage pattern in which the view controller remains loaded in memory but the view itself can be loaded and.. permits a usage pattern in which the view controller remains loaded in memory but the view itself can be loaded and unloaded as required init viewDidLoad viewDidUnload viewDidLoad viewDidUnload ... dealloc Of course it doesn't hurt to release things..

Hidden UINavigationController inside UITabBarController

http://stackoverflow.com/questions/284321/hidden-uinavigationcontroller-inside-uitabbarcontroller

UIViewController inside a UINavigationController when a dialog button is pressed. This view should only be loaded and unloaded programatically ie. it should not appear in the tab bar. However I want the tab bar to be visible always. If I add the UINavigationController..

Will my app get rejected if I place an iAd in a UITableView headerView?

http://stackoverflow.com/questions/3719158/will-my-app-get-rejected-if-i-place-an-iad-in-a-uitableview-headerview

this. I have emphasised the important part of the text. iAds pay by impression in addition to click. Table cells are unloaded reloaded when scrolled off on screen. Reloading will cause a new request. A new request will generate a new impression if..

What to do when my app receives memory warning?

http://stackoverflow.com/questions/4023669/what-to-do-when-my-app-receives-memory-warning

moment will get didReceiveMemoryWarning message. By default calling super didReceiveMemoryWarning controller's view is unloaded released freed . As the view is unloading view controller receives viewDidUnload where you should release all your IBOutlets..

iOS — how do you control the size of a modal view controller?

http://stackoverflow.com/questions/4231022/ios-how-do-you-control-the-size-of-a-modal-view-controller

controller but if you're using UIViewController's presentModalViewController animated method the view behind will be unloaded once your modal view is finished animating onto the screen This assumes you're on an iPhone and you'll see a white screen..

iPhone Development - Simulate Memory Warning

http://stackoverflow.com/questions/491075/iphone-development-simulate-memory-warning

the view is used By the view's superview property. If view.superview is nil the view isn't part of any tree and can be unloaded safely. Once that happens the controller's viewDidUnload gets called. This is the correct place to unload any outlets and.. first time then keep it in an instance variable. Since the _data variable is created on demand it's safe for us to unloaded it in low memory situations it'll just get created again next time we need it. void didReceiveMemoryWarning super didReceiveMemoryWarning..

didReceiveMemoryWarning, viewDidUnload and dealloc

http://stackoverflow.com/questions/5069978/didreceivememorywarning-viewdidunload-and-dealloc

or if you've retained some IBOutlets to help free up memory that wouldn't otherwise be released by the view being unloaded. Action generally any IBOutlets you release in dealloc should also be released and references set to nil in this method... data again. Therefore in your didReceiveMemoryWarning call the superclass implementation first and if its view is unloaded then release the custom data because you know that loadView and viewDidLoad will be invoked again for sure. For example.. and will immediately load the view again. viewDidUnload method viewDidUnload is called when the view controller unloaded the view due to a memory warning . For example if you remove the view from the superview and set the view property of the..

Can somebody explain the process of a UIViewController birth (which method follows which)?

http://stackoverflow.com/questions/5107604/can-somebody-explain-the-process-of-a-uiviewcontroller-birth-which-method-follo

view property. Otherwise the next call to view will trigger the loading process again. The view may also be unloaded at any time during the lifetime of your program simply by setting the view property to nil . The default implementation..