iOS Learning notes Uitabbarcontroller Use Tutorial

To achieve a simple uitabbar:

Appdelegate.m

The code is as follows

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-(BOOL) Application: (UIApplication *) application didfinishlaunchingwithoptions: (nsdictionary *) launchOptions { Self.window = [[UIWindow alloc] initwithframe:[[uiscreen mainscreen] bounds]]; Override point for customization after application launch. Self.window.backgroundColor = [Uicolor Whitecolor]; [Self.window makekeyandvisible]; Uilabel *lab = [[Uilabel alloc]initwithframe:cgrectmake (320/2-140/2, 80, 140, 40)]; Lab.text = @ "rocker Wang"; Lab.textalignment = Uitextalignmentcenter; Lab.backgroundcolor = [Uicolor Bluecolor]; [Self.window Addsubview:lab]; Your code Uilabel *label = [[Uilabel alloc]initwithframe:cgrectmake (320/2-140/2,480/2-40/2, 140, 40)]; Label.text = @ "Hello World"; Label.backgroundcolor = [Uicolor Cyancolor]; Label.textalignment = Uitextalignmentcenter; [Self.window Addsubview:label]; Homeviewcontroller *view1 = [[Homeviewcontroller alloc]init]; Uinavigationcontroller *v1 = [[Uinavigationcontroller alloc]initwithrootviewcontroller:view1]; Messageviewcontroller *view2 = [[Messageviewcontroller alloc]init]; Uinavigationcontroller *v2 = [[Uinavigationcontroller alloc]initwithrootviewcontroller:view2]; Searchviewcontroller *VIEW3 = [[Searchviewcontroller alloc]init]; Uinavigationcontroller *v3 = [[Uinavigationcontroller ALLOC]INITWITHROOTVIEWCONTROLLER:VIEW3]; Settingviewcontroller *view4 = [[Settingviewcontroller alloc]init]; Uinavigationcontroller *v4 = [[Uinavigationcontroller alloc]initwithrootviewcontroller:view4]; Nsarray *arr = @[view1,view2,view3,view4]; Nsarray *viewcontrollers = [Nsarray arraywithobjects:v1,v2,v3,v4, Nil]; Uitabbarcontroller *mainviewcontroller = [[Uitabbarcontroller alloc]init]; Mainviewcontroller.viewcontrollers = viewcontrollers; [Mainviewcontroller Setviewcontrollers:mainviewcontroller]; [Mainviewcontroller release]; [UIApplication sharedapplication].applicationiconbadgenumber = 2; [Self.window Setrootviewcontroller:mainviewcontroller]; return YES; }

Homeviewcontroller.m

code is as follows

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-(ID) Initwithnibname: (NSString *) Nibnameornil Bundle: (NSBundle *) Nibbundleornil { self = [super Initwithnibname:nibnameornil Bundle:nibbundleornil]; if (self) { Custom initialization Self.title = @ "Home"; Self.tabBarItem.badgeValue = @ "New"; } return self; } -(void) Loadview { UIView *view = [[UIView alloc] Initwithframe:[[uiscreen Mainscreen] applicationframe]]; View.backgroundcolor = [Uicolor Whitecolor]; Self.view = view; }

Skills:
Add a digital hint to the iphone icon: Self.tabBarItem.badgeValue = 8;