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2014/10/15 ¤U¤È 10:10:05
iphone Programming Glossary: hierarchyWhen should I release objects in -(void)viewDidUnload rather than in -dealloc? http://stackoverflow.com/questions/1158788/when-should-i-release-objects-in-voidviewdidunload-rather-than-in-dealloc subclasses commonly also contain owning references to various subviews in the view hierarchy. These properties could have been set through IBOutlets when loading from a nib or programmatically.. of subviews by the UIViewController means that even when its view is removed from the view hierarchy and released to save memory through which the subviews are also released by the view they will not actually..
Add UIPickerView & a Button in Action sheet - How? http://stackoverflow.com/questions/1262574/add-uipickerview-a-button-in-action-sheet-how for UIActionSheet UIActionSheet is not designed to be subclassed nor should you add views to its hierarchy I recommend against trying to customize the contents of an ActionSheet as it can lead to serious invalid..
iPhone viewWillAppear not firing http://stackoverflow.com/questions/131062/iphone-viewwillappear-not-firing numerous posts about people having problems with viewWillAppear when you do not create your view hierarchy just right. My problem is I can't figure out what that means. If I create a RootViewController and call.. level Apple's Docs state Warning If the view belonging to a view controller is added to a view hierarchy directly the view controller will not receive this message. If you insert or add a view to the view.. the view controller will not receive this message. If you insert or add a view to the view hierarchy and it has a view controller you should send the associated view controller this message directly. Failing..
Programmatically align a toolbar on top of the iPhone keyboard http://stackoverflow.com/questions/158574/programmatically-align-a-toolbar-on-top-of-the-iphone-keyboard
Popover with embedded navigation controller doesn't respect size on back nav http://stackoverflow.com/questions/2752394/popover-with-embedded-navigation-controller-doesnt-respect-size-on-back-nav on back nav I have a UIPopoverController hosting a UINavigationController which contains a small hierarchy of view controllers. I followed the docs and for each view controller I set the view's popover context.. 320 500 size different for each controller This works as expected as I navigate forward in the hierarchy the popover automatically animates size changes to correspond to the pushed controller. However when..
Choosing the right IOS XML parser http://stackoverflow.com/questions/4181690/choosing-the-right-ios-xml-parser I have a medium sized XML file that contains alot of duplicate tags at different points in the hierarchy . I was thinking about TBXML but I was concerned about its lack of XPath support. For instance lets..
iOS SDK - Programmatically generate a PDF file http://stackoverflow.com/questions/4362734/ios-sdk-programmatically-generate-a-pdf-file I call a function to render the view to the PDF file. This function recursively walks the view hierarchy and renders each subview. For my project I need to support only Label ImageView and View for nested..
Gesture recognizer and button actions http://stackoverflow.com/questions/4825199/gesture-recognizer-and-button-actions recognizer and button actions I have a view hierarchy that looks something like this UIView A UIView UIImageView UIView UIView B UIView UIView B Rounded Rect.. the button's Touch Up Inside event. How can i make it work I thought that the responder chain hierarchy will make sure that the button touch event will be given preference and it WILL get triggered What am..
Return to app behavior after phone call different in native code than UIWebView http://stackoverflow.com/questions/5317783/return-to-app-behavior-after-phone-call-different-in-native-code-than-uiwebview Instead just load a tel URL request in an instance of UIWebView without adding it to your view hierarchy. For example #import Foundation Foundation.h #import UIKit UIKit.h @interface PhoneCaller NSObject @private..
What's the best way to communicate between view controllers? http://stackoverflow.com/questions/569940/whats-the-best-way-to-communicate-between-view-controllers to be communicated Define input parameters for your view controller For communicating back up the hierarchy use loose coupling Define a generic interface for observers like delegation This slide is then followed.. ... When the Apple guys are talking about using the delegation pattern to communicate back up the hierarchy they're still talking about dependency injection. In this example what should the BookPickerViewController..
Tab bar controller inside a navigation controller, or sharing a navigation root view http://stackoverflow.com/questions/576764/tab-bar-controller-inside-a-navigation-controller-or-sharing-a-navigation-root down further the subsequent levels don't show the tab bar . So this seems like the implementation hierarchy is UINavigationController Accounts UITableViewController UITabBarController Tweets UITableViewController..
Transparent Modal View on Navigation Controller http://stackoverflow.com/questions/849458/transparent-modal-view-on-navigation-controller methods in your root view controller . You can add the modal view directly to the view hierarchy like so UIView modalView UIView alloc initWithFrame UIScreen mainScreen bounds autorelease modalView.opaque..
How to know the UITableview row number http://stackoverflow.com/questions/9274494/how-to-know-the-uitableview-row-number event. iphone ios uitableview uiswitch share improve this question Tags subclasses or view hierarchy navigation are too much work . Do this in your action method CGPoint hitPoint sender convertPoint CGPointZero..
When should I release objects in -(void)viewDidUnload rather than in -dealloc? http://stackoverflow.com/questions/1158788/when-should-i-release-objects-in-voidviewdidunload-rather-than-in-dealloc of the most important reasons for implementing it is that UIViewController subclasses commonly also contain owning references to various subviews in the view hierarchy. These properties could have been set through IBOutlets when loading from a nib or programmatically inside loadView for instance. The additional ownership of subviews.. inside loadView for instance. The additional ownership of subviews by the UIViewController means that even when its view is removed from the view hierarchy and released to save memory through which the subviews are also released by the view they will not actually be deallocated because the UIViewController itself still..
Add UIPickerView & a Button in Action sheet - How? http://stackoverflow.com/questions/1262574/add-uipickerview-a-button-in-action-sheet-how share improve this question Update for iOS 7 Apple docs for UIActionSheet UIActionSheet is not designed to be subclassed nor should you add views to its hierarchy I recommend against trying to customize the contents of an ActionSheet as it can lead to serious invalid context errors in iOS 7. I just spent a few hours working..
iPhone viewWillAppear not firing http://stackoverflow.com/questions/131062/iphone-viewwillappear-not-firing viewWillAppear not firing I've read numerous posts about people having problems with viewWillAppear when you do not create your view hierarchy just right. My problem is I can't figure out what that means. If I create a RootViewController and call addSubView on that controller I would expect the added view.. that successfully recieves viewWillAppear events at every level Apple's Docs state Warning If the view belonging to a view controller is added to a view hierarchy directly the view controller will not receive this message. If you insert or add a view to the view hierarchy and it has a view controller you should send the associated.. to a view controller is added to a view hierarchy directly the view controller will not receive this message. If you insert or add a view to the view hierarchy and it has a view controller you should send the associated view controller this message directly. Failing to send the view controller this message will prevent..
Programmatically align a toolbar on top of the iPhone keyboard http://stackoverflow.com/questions/158574/programmatically-align-a-toolbar-on-top-of-the-iphone-keyboard
Popover with embedded navigation controller doesn't respect size on back nav http://stackoverflow.com/questions/2752394/popover-with-embedded-navigation-controller-doesnt-respect-size-on-back-nav with embedded navigation controller doesn't respect size on back nav I have a UIPopoverController hosting a UINavigationController which contains a small hierarchy of view controllers. I followed the docs and for each view controller I set the view's popover context size like so self setContentSizeForViewInPopover CGSizeMake.. size like so self setContentSizeForViewInPopover CGSizeMake 320 500 size different for each controller This works as expected as I navigate forward in the hierarchy the popover automatically animates size changes to correspond to the pushed controller. However when I navigate Back through the view stack via the navigation bar's..
Choosing the right IOS XML parser http://stackoverflow.com/questions/4181690/choosing-the-right-ios-xml-parser So There are a million different XML parsers for the iPhone. I have a medium sized XML file that contains alot of duplicate tags at different points in the hierarchy . I was thinking about TBXML but I was concerned about its lack of XPath support. For instance lets say my XML file looked like this. blog author foo1 author comments..
iOS SDK - Programmatically generate a PDF file http://stackoverflow.com/questions/4362734/ios-sdk-programmatically-generate-a-pdf-file if label nil label.text firstName nil firstName @ None Then I call a function to render the view to the PDF file. This function recursively walks the view hierarchy and renders each subview. For my project I need to support only Label ImageView and View for nested views void addObject UIView view if view nil view.hidden if..
Gesture recognizer and button actions http://stackoverflow.com/questions/4825199/gesture-recognizer-and-button-actions recognizer and button actions I have a view hierarchy that looks something like this UIView A UIView UIImageView UIView UIView B UIView UIView B Rounded Rect Button UIView UIView B UIImageView UIView UIView B UILabel.. UIView B . The singleTap gesture recognizer captures overrides the button's Touch Up Inside event. How can i make it work I thought that the responder chain hierarchy will make sure that the button touch event will be given preference and it WILL get triggered What am i missing Here's some related code #pragma mark #pragma mark..
Return to app behavior after phone call different in native code than UIWebView http://stackoverflow.com/questions/5317783/return-to-app-behavior-after-phone-call-different-in-native-code-than-uiwebview display the UIWebView to get its tel URL handling behavior. Instead just load a tel URL request in an instance of UIWebView without adding it to your view hierarchy. For example #import Foundation Foundation.h #import UIKit UIKit.h @interface PhoneCaller NSObject @private UIWebView webview void callTelURL NSURL url @end @implementation..
What's the best way to communicate between view controllers? http://stackoverflow.com/questions/569940/whats-the-best-way-to-communicate-between-view-controllers Best Practices for Data Flow Figure out exactly what needs to be communicated Define input parameters for your view controller For communicating back up the hierarchy use loose coupling Define a generic interface for observers like delegation This slide is then followed by what appears to be a place holder slide where the lecturer.. object which was injected for me myBookWarehouse listBooks ... When the Apple guys are talking about using the delegation pattern to communicate back up the hierarchy they're still talking about dependency injection. In this example what should the BookPickerViewController do once the user has picked his her books and is ready..
Tab bar controller inside a navigation controller, or sharing a navigation root view http://stackoverflow.com/questions/576764/tab-bar-controller-inside-a-navigation-controller-or-sharing-a-navigation-root Each tab item shows a different list and lets you drill down further the subsequent levels don't show the tab bar . So this seems like the implementation hierarchy is UINavigationController Accounts UITableViewController UITabBarController Tweets UITableViewController Detail view of a tweet user etc Replies UITableViewController..
Transparent Modal View on Navigation Controller http://stackoverflow.com/questions/849458/transparent-modal-view-on-navigation-controller verify this by implementing the viewWillDisappear and viewDidDisappear methods in your root view controller . You can add the modal view directly to the view hierarchy like so UIView modalView UIView alloc initWithFrame UIScreen mainScreen bounds autorelease modalView.opaque NO modalView.backgroundColor UIColor blackColor colorWithAlphaComponent..
How to know the UITableview row number http://stackoverflow.com/questions/9274494/how-to-know-the-uitableview-row-number switch is I need the row number in the switch value changed event. iphone ios uitableview uiswitch share improve this question Tags subclasses or view hierarchy navigation are too much work . Do this in your action method CGPoint hitPoint sender convertPoint CGPointZero toView self.tableView NSIndexPath hitIndex self.tableView..
When should I release objects in -(void)viewDidUnload rather than in -dealloc? http://stackoverflow.com/questions/1158788/when-should-i-release-objects-in-voidviewdidunload-rather-than-in-dealloc it is that UIViewController subclasses commonly also contain owning references to various subviews in the view hierarchy. These properties could have been set through IBOutlets when loading from a nib or programmatically inside loadView for.. The additional ownership of subviews by the UIViewController means that even when its view is removed from the view hierarchy and released to save memory through which the subviews are also released by the view they will not actually be deallocated..
Add UIPickerView & a Button in Action sheet - How? http://stackoverflow.com/questions/1262574/add-uipickerview-a-button-in-action-sheet-how for iOS 7 Apple docs for UIActionSheet UIActionSheet is not designed to be subclassed nor should you add views to its hierarchy I recommend against trying to customize the contents of an ActionSheet as it can lead to serious invalid context errors..
iPhone viewWillAppear not firing http://stackoverflow.com/questions/131062/iphone-viewwillappear-not-firing not firing I've read numerous posts about people having problems with viewWillAppear when you do not create your view hierarchy just right. My problem is I can't figure out what that means. If I create a RootViewController and call addSubView on that.. events at every level Apple's Docs state Warning If the view belonging to a view controller is added to a view hierarchy directly the view controller will not receive this message. If you insert or add a view to the view hierarchy and it has.. a view hierarchy directly the view controller will not receive this message. If you insert or add a view to the view hierarchy and it has a view controller you should send the associated view controller this message directly. Failing to send the view..
Programmatically align a toolbar on top of the iPhone keyboard http://stackoverflow.com/questions/158574/programmatically-align-a-toolbar-on-top-of-the-iphone-keyboard
Popover with embedded navigation controller doesn't respect size on back nav http://stackoverflow.com/questions/2752394/popover-with-embedded-navigation-controller-doesnt-respect-size-on-back-nav doesn't respect size on back nav I have a UIPopoverController hosting a UINavigationController which contains a small hierarchy of view controllers. I followed the docs and for each view controller I set the view's popover context size like so self.. CGSizeMake 320 500 size different for each controller This works as expected as I navigate forward in the hierarchy the popover automatically animates size changes to correspond to the pushed controller. However when I navigate Back through..
Choosing the right IOS XML parser http://stackoverflow.com/questions/4181690/choosing-the-right-ios-xml-parser parsers for the iPhone. I have a medium sized XML file that contains alot of duplicate tags at different points in the hierarchy . I was thinking about TBXML but I was concerned about its lack of XPath support. For instance lets say my XML file looked..
iOS SDK - Programmatically generate a PDF file http://stackoverflow.com/questions/4362734/ios-sdk-programmatically-generate-a-pdf-file firstName @ None Then I call a function to render the view to the PDF file. This function recursively walks the view hierarchy and renders each subview. For my project I need to support only Label ImageView and View for nested views void addObject..
Gesture recognizer and button actions http://stackoverflow.com/questions/4825199/gesture-recognizer-and-button-actions recognizer and button actions I have a view hierarchy that looks something like this UIView A UIView UIImageView UIView UIView B UIView UIView B Rounded Rect Button UIView UIView.. captures overrides the button's Touch Up Inside event. How can i make it work I thought that the responder chain hierarchy will make sure that the button touch event will be given preference and it WILL get triggered What am i missing Here's some..
Event handling for iOS - how hitTest:withEvent: and pointInside:withEvent: are related? http://stackoverflow.com/questions/4961386/event-handling-for-ios-how-hittestwithevent-and-pointinsidewithevent-are-r described there. The document says In hit testing a window calls hitTest withEvent on the top most view of the view hierarchy this method proceeds by recursively calling pointInside withEvent on each view in the view hierarchy that returns YES proceeding.. view of the view hierarchy this method proceeds by recursively calling pointInside withEvent on each view in the view hierarchy that returns YES proceeding down the hierarchy until it finds the subview within whose bounds the touch took place. That.. by recursively calling pointInside withEvent on each view in the view hierarchy that returns YES proceeding down the hierarchy until it finds the subview within whose bounds the touch took place. That view becomes the hit test view. So is it like..
Return to app behavior after phone call different in native code than UIWebView http://stackoverflow.com/questions/5317783/return-to-app-behavior-after-phone-call-different-in-native-code-than-uiwebview URL handling behavior. Instead just load a tel URL request in an instance of UIWebView without adding it to your view hierarchy. For example #import Foundation Foundation.h #import UIKit UIKit.h @interface PhoneCaller NSObject @private UIWebView webview..
What's the best way to communicate between view controllers? http://stackoverflow.com/questions/569940/whats-the-best-way-to-communicate-between-view-controllers exactly what needs to be communicated Define input parameters for your view controller For communicating back up the hierarchy use loose coupling Define a generic interface for observers like delegation This slide is then followed by what appears.. listBooks ... When the Apple guys are talking about using the delegation pattern to communicate back up the hierarchy they're still talking about dependency injection. In this example what should the BookPickerViewController do once the user..
Tab bar controller inside a navigation controller, or sharing a navigation root view http://stackoverflow.com/questions/576764/tab-bar-controller-inside-a-navigation-controller-or-sharing-a-navigation-root and lets you drill down further the subsequent levels don't show the tab bar . So this seems like the implementation hierarchy is UINavigationController Accounts UITableViewController UITabBarController Tweets UITableViewController Detail view of..
Transparent Modal View on Navigation Controller http://stackoverflow.com/questions/849458/transparent-modal-view-on-navigation-controller and viewDidDisappear methods in your root view controller . You can add the modal view directly to the view hierarchy like so UIView modalView UIView alloc initWithFrame UIScreen mainScreen bounds autorelease modalView.opaque NO modalView.backgroundColor..
How to know the UITableview row number http://stackoverflow.com/questions/9274494/how-to-know-the-uitableview-row-number switch value changed event. iphone ios uitableview uiswitch share improve this question Tags subclasses or view hierarchy navigation are too much work . Do this in your action method CGPoint hitPoint sender convertPoint CGPointZero toView self.tableView..
iPhone: OpenAL & AudioToolbox leak http://stackoverflow.com/questions/3837294/iphone-openal-audiotoolbox-leak CALayer layoutSublayers 25 QuartzCore CALayerLayoutIfNeeded 26 QuartzCore CALayer layoutIfNeeded 27 UIKit UIView Hierarchy layoutIfNeeded 28 UIKit UIViewController window willAnimateRotationToInterfaceOrientation duration 29 UIKit UIWindow _setRotatableClient.. viewDidMoveToWindow shouldAppearOrDisappear 37 UIKit UIView Internal _didMoveFromWindow toWindow 38 UIKit UIView Hierarchy _postMovedFromSuperview 39 UIKit UIView Internal _addSubview positioned relativeTo 40 UIKit UIView Hierarchy addSubview.. UIView Hierarchy _postMovedFromSuperview 39 UIKit UIView Internal _addSubview positioned relativeTo 40 UIKit UIView Hierarchy addSubview 41 myApp myAppAppDelegate applicationDidFinishLaunching Users kpower Documents projects myApp Classes myAppAppDelegate.m..
Am I abusing UIViewController Subclassing? http://stackoverflow.com/questions/5691226/am-i-abusing-uiviewcontroller-subclassing for what I've laid out above. Here's a relevant passage from the subsection titled View Controllers Manage a View Hierarchy View controllers are directly associated with a single view object but that object is often just the root view of a much..
How to make a UITableViewCell with different subviews reusable? http://stackoverflow.com/questions/5746904/how-to-make-a-uitableviewcell-with-different-subviews-reusable
iPhone - Create a semi transparent rectangle with opaque text http://stackoverflow.com/questions/5795688/iphone-create-a-semi-transparent-rectangle-with-opaque-text uiview transparency uilabel alpha share improve this question Can be easily done with interface builder View Hierarchy NOTE The background has to be a separate view which is the first entry in the list of controls so it is in the background...
Traversing the View Hierarchy on the iPhone [closed] http://stackoverflow.com/questions/751876/traversing-the-view-hierarchy-on-the-iphone the View Hierarchy on the iPhone closed Here is a helpful routine you can use on the iPhone to traverse the view hierarchy when you want to..
How to pass object on modal view's dismissal http://stackoverflow.com/questions/7962519/how-to-pass-object-on-modal-views-dismissal routineDayTableViewController addExercise self.parentViewController dismissModalViewControllerAnimated YES Hierarchy of VC RoutineDayTableViewController presents Modally MusclesTableViewController then pushes to child table view which dismisses..
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