Mobile QQ bottom section bar effect "tab bar"

Appdelegate.m

appdelegate.m//task5////Created by Lyb on 14-9-27.//Copyright (c) 2014 imac. All rights reserved.//#import "AppDelegate.h" #import "FirstViewController.h" #import "SecondViewController.h" @ Implementation appdelegate-(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];    Firstviewcontroller *firstctrl = [[Firstviewcontroller alloc] init];        Secondviewcontroller *secondctrl =[[secondviewcontroller alloc] init];    Uinavigationcontroller *NAVCTRL1 = [[Uinavigationcontroller alloc] Initwithrootviewcontroller:firstctrl];        Uinavigationcontroller *NAVCTRL2 = [[Uinavigationcontroller alloc] Initwithrootviewcontroller:secondctrl]; Uitabbarcontroller *tabbarctrl = [[UitabbarcontRoller alloc] init];        Tabbarctrl.viewcontrollers = @[navctrl1, navCtrl2];        Self.window.rootViewController = Tabbarctrl; return YES;} @end

Firstviewcontroller.m

-(void) viewdidload{    [Super Viewdidload];    Self.title = @ "left";        Self.view.backgroundColor = [Uicolor redcolor];}

Secondviewcontroller.m

#import "SecondViewController.h" #import "ThirdViewController.h" @interface Secondviewcontroller () @ End@implementation secondviewcontroller-(ID) initwithnibname: (NSString *) Nibnameornil Bundle: (NSBundle *) nibbundleornil{self    = [super Initwithnibname:nibnameornil Bundle:nibbundleornil];    if (self) {        self.title = @ "right";    }    return self;} -(void) viewdidload{    [Super Viewdidload];        Self.view.backgroundColor = [Uicolor greencolor];        UIButton *button = [UIButton buttonwithtype:uibuttontypecontactadd];    Button.frame = CGRectMake (All-in-all;    [Button addtarget:self action: @selector (Buttonaction) forcontrolevents:uicontroleventtouchupinside];    [Self.view Addsubview:button];} -(void) buttonaction{    thirdviewcontroller *thirdctrl = [[Thirdviewcontroller alloc] init];        [Self.navigationcontroller Pushviewcontroller:thirdctrl animated:yes];}

Thirdviewcontroller.m

-(ID) Initwithnibname: (NSString *) Nibnameornil Bundle: (NSBundle *) nibbundleornil{self    = [Super Initwithnibname: Nibnameornil Bundle:nibbundleornil];    if (self) {        //Hides tab bar toolbar        self.hidesbottombarwhenpushed = YES;    }    return self;} -(void) viewdidload{    [Super Viewdidload];    Self.view.backgroundColor = [Uicolor orangecolor];    Self.title = @ "three";    }

Mobile QQ bottom section bar effect "tab bar"