NavigationBar & amp; UINavigationItem & amp; toolbar method summary

Use of NavigationBar

1. // use the setnavigationbarhidmethod of the navigation controller to hide the navigation bar

[Self. navigationControllersetNavigationBarHidden: YES];

 

2. // the size of the navigation bar in the navigation controller is fixed (320*44)

 

3. // how to get the navigation bar

// Self. navigationController. navigationBar

 

4. // set the style of the navigation bar (black style, default: Defautl style, after iOS7, the remaining three styles are almost the same). Setting the Style of the navigation bar will affect the status bar

// Before iOS7, setting the navigation bar style does not affect the status bar

Self. navigationController. navigationBar. barStyle = UIBarStyleDefault;

 

5. // multiple applications in Development (set the background image of the navigation bar)

// UIBarMetricsDefault: iPhone portrait Mode)

// The iPhone landscape (Landscape mode) corresponding to UIBarMetricsLandscapePhone)

 

6. // The image size is strictly (320*44, 640*88 Retina screen) // The image size strictly complies with the 320*44 size, and the texture will not affect the status bar, the status bar automatically displays the original style.

[Self. navigationController. navigationBarsetBackgroundImage: [UIImageimageNamed: @ "navigationbar"] forBarMetrics: UIBarMetricsDefault];

// Horizontal screen navigation bar size (480*32) (Landscape mode)

[Self. navigationController. navigationBarsetBackgroundImage: [UIImageimageNamed: @ "nav-32"] forBarMetrics: UIBarMetricsLandscapePhone];

 

UINavigationItem (used to customize the display of content on the navigation bar)

1. // set the title displayed on the navigation bar through navigationItem

Self. navigationItem. title = @ "root ";

2. // set the title view displayed on the navigation bar

Set titleView of the navigation bar to a view

Self. navigationItem. titleView = titleView;

3. UIBarButtonItem objects can be created in multiple ways.

/// Initialize the title

/// UIBarButtonItemStylePlain (iOS7 removes all the rounded rectangle and border of the Item)

/// UIBarButtonItemStylePlain (iOS7 removes all the rounded rectangle and border of the Item)

4. ///// displayed on the left of the navigation bar

Self. navigationItem. leftBarButtonItem = item;

5. /// use the style provided by the system to initialize the UIBarButtonItem object.

UIBarButtonItem * item1 = [[UIBarButtonItemalloc] initWithBarButtonSystemItem: UIBarButtonSystemItemCameratarget: selfaction: @ selector (rightItemClicked :)];

6. // The most common method for UIBarButtonItem creation in development: initWithCustomView (receiving UIView) the most commonly used method for receiving a UIButton (custom style, texture)

UIButton * customBtn = [UIButtonbuttonWithType: UIButtonTypeCustom];

[CustomBtn setFrame: CGRectMake (0, 0, 30, 30)];

[CustomBtn setBackgroundImage: [UIImageimageNamed: @ "itemImage"] forState: UIControlStateNormal];

[CustomBtn addTarget: self action: @ selector (custombtnClicked)

ForControlEvents: UIControlEventTouchUpInside];

// The above is a custom button. The following sentence assigns the created button as a mmview to barbuttonitem.

UIBarButtonItem * item2 = [[UIBarButtonItem alloc] initWithCustomView: customBtn];

7. /// it will be displayed from right to left on the navigation bar

NSArray * array = [NSArray arrayWithObjects: item1, item2, nil];

[Item1 release];

[Item2 release];

//// The rightBarButtonItems array sets the UIBarButtonItem display. The element of the array must be the UIBarButtonItem object.

Self. navigationItem. rightBarButtonItems = array;

 

8. Determine whether a method exists in a class.

// Determine whether _ delegate supports sendTitle: Method

If ([class respondsToSelector: @ selector (sendTitle :)])

 

Toolbar (toolbar)

1. // each navigation controller has a toolbar, which is a UIToolBar object. It is displayed at the bottom and the size (320*44). The toolbar is hidden by default.

// Display the toolbar

[Self. navigationControllersetToolbarHidden: NO];

2. // UIToolbarPositionBottom (TopBar and BottomBar can be specified for each UIView). The toolbar in the navigation controller is automatically created as the BottomBar of the navigation controller view.

[Self. navigationController. toolbarsetBackgroundImage: [UIImageimageNamed: @ "toolBar.png"] forToolbarPosition: UIToolbarPositionBottombarMetrics: UIBarMetricsDefault];

 

3. UIBarButtonItem * item1 = [[UIBarButtonItemalloc] initWithBarButtonSystemItem: UIBarButtonSystemItemAddtarget: selfaction: @ selector (itemClicked)];

UIBarButtonItem * item2 = [[UIBarButtonItemalloc] initWithBarButtonSystemItem: UIBarButtonSystemItemEdittarget: selfaction: @ selector (itemClicked)];

// UIBarButtonSystemItemFlexibleSpace)

UIBarButtonItem * space = [[UIBarButtonItemalloc] initWithBarButtonSystemItem: UIBarButtonSystemItemFlexibleSpacetarget: selfaction: @ selector (itemClicked)];

NSArray * array = [NSArray arrayWithObjects: space, item1, space, item2, space, nil];

[Item1 release];

[Item2 release];

[Space release];

Self. toolbarItems = array;

// During development, the toolbar at the bottom is often customized through UIView + UIButton.