iOS Xib文件详解

https://developer.apple.com/library/ios/documentation/UIKit/Reference/UIViewController_Class/#//apple_ref/occ/instp/UIViewController/nibName

用xib这种方式是需要加载xib文件的。加载xib文件有两种方法：

// 第一种方法（较为常用）
CYLView *view = [[[NSBundle mainBundle] loadNibNamed:@"CYLView" owner:nil options:nil] firstObject]; // CYLView代表CYLView.xib，代表CYLView这个类对应的xib文件。这个方法返回的是一个NSArray，我们取第一个Object或最后一个（因为这个数组只有一个CYLView没有其他对象）就是需要加载的CYLView。

// 第二种方法
UINib *nib = [UINib nibWithNibName:@"CYLView" bundle:nil];
NSArray *objectArray = [nib instantiateWithOwner:nil options:nil];
CYLView *view = [objectArray firstObject];

For more information about how the system determines which view controllers to preserve and restore, seeApp
Programming Guide for iOS.

Configuring a View Controller Using Nib Files

-
initWithNibName:bundle:

Designated
Initializer

nibName

Property

The name of the view controller'€™s nib file, if one was specified. (read-only)

Declaration

OBJECTIVE-C

@property(nonatomic, readonly, copy) NSString *nibName

Discussion

This property contains the value specified at initialization time to the

initWithNibName:bundle:

method.
The value of this property may be

nil

.

If you use a nib file to store your view controller'€™s view, it is recommended that you specify that nib file explicitly when initializing your view controller. However, if you do not specify a nib name, and do not override the

loadView

method
in your custom subclass, the view controller searches for a nib file using other means. Specifically, it looks for a nib file with an appropriate name (without the

.nib

extension)
and loads that nib file whenever its view is requested. Specifically, it looks (in order) for a nib file with one of the following names:

If the view controller class name ends with the word ‘Controller’, as in

MyViewController

,
it looks for a nib file whose name matches the class name without the word ‘€œController’, as in

MyView.nib

.

It looks for a nib file whose name matches the name of the view controller class. For example, if the class name is

MyViewController

,
it looks for a

MyViewController.nib

file.

NOTE

Nib names that include a platform-specific identifier such as

~iphone

or

~ipad

are
loaded only on a device of the corresponding type. For example, a nib name of

MyViewController~ipad.nib

is
loaded only on iPad. If your app supports both platform types, you must provide versions of your nib files for each platform.

Availability

Available in iOS 2.0 and later.

See Also

– initWithNibName:bundle:

nibBundle

nibBundle

Property

Interacting with Storyboards and Segues

storyboard

Property

-
shouldPerformSegueWithIdentifier:sender:

-
prepareForSegue:sender:

-
performSegueWithIdentifier:sender:

-
allowedChildViewControllersForUnwindingFromSource:

-
childViewControllerContainingSegueSource:

-
canPerformUnwindSegueAction:fromViewController:withSender:

-
unwindForSegue:towardsViewController:

-
viewControllerForUnwindSegueAction:fromViewController:withSender:

(iOS
9.0)

-
segueForUnwindingToViewController:fromViewController:identifier:

(iOS
9.0)

Managing the View

view

Property

-
isViewLoaded

-
loadView

-
viewDidLoad

-
loadViewIfNeeded

viewIfLoaded

Property

title

Property

preferredContentSize

Property

Presenting View Controllers

modalPresentationStyle

Property

modalTransitionStyle

Property

modalInPopover

Property

-
showViewController:sender:

-
showDetailViewController:sender:

-
presentViewController:animated:completion:

-
dismissViewControllerAnimated:completion:

definesPresentationContext

Property

providesPresentationContextTransitionStyle

Property

-
disablesAutomaticKeyboardDismissal

Supporting Custom Transitions and Presentations

transitioningDelegate

Property

-
transitionCoordinator

-
targetViewControllerForAction:sender:

presentationController

Property

popoverPresentationController

Property

Responding to View Events

-
viewWillAppear:

-
viewDidAppear:

-
viewWillDisappear:

-
viewDidDisappear:

Configuring the View’s Layout Behavior

-
viewWillLayoutSubviews

-
viewDidLayoutSubviews

-
updateViewConstraints

bottomLayoutGuide

Property

topLayoutGuide

Property

edgesForExtendedLayout

Property

extendedLayoutIncludesOpaqueBars

Property

automaticallyAdjustsScrollViewInsets

Property

Testing for Specific Kinds of View Transitions

-
isMovingFromParentViewController

-
isMovingToParentViewController

-
isBeingPresented

-
isBeingDismissed

Configuring the View Rotation Settings

-
shouldAutorotate

-
supportedInterfaceOrientations

-
preferredInterfaceOrientationForPresentation

+
attemptRotationToDeviceOrientation

Adapting to Environment Changes

-
collapseSecondaryViewController:forSplitViewController:

-
separateSecondaryViewControllerForSplitViewController:

Managing Child View Controllers in a Custom Container

childViewControllers

Property

-
addChildViewController:

-
removeFromParentViewController

-
transitionFromViewController:toViewController:duration:options:animations:completion:

-
shouldAutomaticallyForwardAppearanceMethods

-
beginAppearanceTransition:animated:

-
endAppearanceTransition

-
setOverrideTraitCollection:forChildViewController:

-
overrideTraitCollectionForChildViewController:

Responding to Containment Events

-
willMoveToParentViewController:

-
didMoveToParentViewController:

Getting Other Related View Controllers

presentingViewController

Property

presentedViewController

Property

parentViewController

Property

navigationController

Property

splitViewController

Property

tabBarController

Property

Handling Memory Warnings

-
didReceiveMemoryWarning

Managing State Restoration

restorationIdentifier

Property

restorationClass

Property

-
encodeRestorableStateWithCoder:

-
decodeRestorableStateWithCoder:

-
applicationFinishedRestoringState

Supporting App Extensions

extensionContext

Property

Working With 3D Touch Previews and Preview Quick Actions

The methods in this task group are available on devices that support 3D Touch. The end-user terminology for the views presented during the phases of force-based touches includes peek and pop.
For clarity here, and to align with the API names, this document uses the corresponding terms preview and commit
view. To learn more about 3D Touch, read Adopting
3D Touch on iPhone.

-
registerForPreviewingWithDelegate:sourceView:

-
unregisterForPreviewingWithContext:

-
previewActionItems

Managing the Status Bar

-
childViewControllerForStatusBarHidden

-
childViewControllerForStatusBarStyle

-
preferredStatusBarStyle

-
prefersStatusBarHidden

modalPresentationCapturesStatusBarAppearance

Property

-
preferredStatusBarUpdateAnimation

-
setNeedsStatusBarAppearanceUpdate

Configuring a Navigation Interface

navigationItem

Property

hidesBottomBarWhenPushed

Property

-
setToolbarItems:animated:

toolbarItems

Property

Configuring Tab Bar Items

tabBarItem

Property

Adding Editing Behaviors to Your View Controller

editing

Property

-
setEditing:animated:

-
editButtonItem

Accessing the Available Key Commands

-
addKeyCommand:

-
removeKeyCommand:

Managing Banner Ads

canDisplayBannerAds

Property

originalContentView

Property

Determining Whether the View Controller is Displaying an Ad

presentingFullScreenAd

Property

displayingBannerAd

Property

Managing Interstitial Ads

+
prepareInterstitialAds

interstitialPresentationPolicy

Property

-
requestInterstitialAdPresentation

-
shouldPresentInterstitialAd

Deprecated

-
viewWillUnload

(iOS 6.0)

-
viewDidUnload

(iOS 6.0)

contentSizeForViewInPopover

(iOS
7.0) Property

-
presentModalViewController:animated:

(iOS
6.0)

-
dismissModalViewControllerAnimated:

(iOS
6.0)

wantsFullScreenLayout

(iOS
7.0) Property

-
shouldAutorotateToInterfaceOrientation:

(iOS
6.0)

-
rotatingHeaderView

(iOS 8.0)

-
rotatingFooterView

(iOS 8.0)

interfaceOrientation

(iOS
8.0) Property

-
willRotateToInterfaceOrientation:duration:

(iOS
8.0)

-
willAnimateRotationToInterfaceOrientation:duration:

(iOS
8.0)

-
didRotateFromInterfaceOrientation:

(iOS
8.0)

-
willAnimateFirstHalfOfRotationToInterfaceOrientation:duration:

(iOS
5.0)

-
didAnimateFirstHalfOfRotationToInterfaceOrientation:

(iOS
5.0)

-
willAnimateSecondHalfOfRotationFromInterfaceOrientation:duration:

(iOS
5.0)

searchDisplayController

(iOS
8.0) Property

modalViewController

(iOS
6.0) Property

-
shouldAutomaticallyForwardRotationMethods

(iOS
8.0)

-
automaticallyForwardAppearanceAndRotationMethodsToChildViewControllers

(iOS
6.0)

-
presentMoviePlayerViewControllerAnimated:

(iOS
9.0)

-
dismissMoviePlayerViewControllerAnimated

(iOS
9.0)

Constants

UIModalPresentationStyle

UIModalTransitionStyle

ADInterstitialPresentationPolicy

Exceptions

Notifications

UIViewControllerShowDetailTargetDidChangeNotification