Knowledge about IOS uinavigationcontroller and uitabbarcontroller

1. Navigation uinavigationcontroller

Navigate to a controller:

[Navigatecontroller pushviewcontroller: loginview animated: Yes];

Code returned to the previous page:

[Self. navigationcontroller
Popviewcontrolleranimated: Yes];

Code returned to the root:

[Self. navigationcontroller poptorootviewcontrolleranimated: <# (bool) #>]

Return the fixed view code:

[Self. navigationcontroller poptoviewcontroller: <# (uiviewcontroller *) #> animated: <# (bool) #>:< # (bool) #>]

Sample Code:

Code example 1

-(Bool) Application :( uiapplication *) Application didfinishlaunchingwitexceptions :( nsdictionary
*) Launchoptions

{

Self. Window = [[uiwindow
Alloc] initwithframe: [[uiscreen
Mainscreen] bounds]
Autorelease];

// Override point for customization after application launch.

Loginviewcontroller * loginview = [[loginviewcontroller
Alloc] init];

Loginview. Title = @ "User Login ";

Uinavigationcontroller * navigatecontroller = [uinavigationcontroller
Alloc] init];

[Navigatecontroller
Pushviewcontroller: loginview
Animated: Yes];

[Self. Window
Addsubview: navigatecontroller. View];

Self. Window. backgroundcolor = [uicolor
Whitecolor];

[Self. Window
Makekeyandvisible];

Return
Yes;

}

Ii. uitabbarcontroller knowledge sorting

Code Example 2

-(Void) onlogin :( ID) sender

{

Uitabbarcontroller * tabcontroller = [uitabbarcontroller
Alloc] init];

Infoviewcontroller * info = [[infoviewcontroller
Alloc] init];

Info. Title = @ "phone bill query ";

Uinavigationcontroller * infonav = [uinavigationcontroller
Alloc] init];

[Infonav pushviewcontroller: info
Animated: Yes];

Uinavigationcontroller * indexnav = [uinavigationcontroller
Alloc] init];

Indexviewcontroller * indexcontroller = [indexviewcontroller
Alloc] init];

Indexcontroller. Title = @ "Buddha worship system ";

[Indexnav
Pushviewcontroller: indexcontroller
Animated: Yes];

Tabcontroller. viewcontrollers = [nsarray
Arraywithobjects: indexnav, infonav,
Nil];

[Self
Presentmodalviewcontroller: tabcontroller
Animated: Yes];

}

One or two examples of Code are as follows: