iOS design multi-view navigation bar Uinavigationcontroller simple design for switching views

Create a project on the iOS platform, then create two class views in the project as follows 1, set the background color for the main view in two class views respectively firstviewcontroller.m
#import "FirstViewController.h"

@interface Firstviewcontroller ()

@end

@implementation Firstviewcontroller

-(void) Viewdidload {
[Super Viewdidload];

Set the background color of the main view
Self.view.backgroundcolor=[uicolor Greencolor]; } SECONDVIEWCONTROLLER.M
#import "SecondViewController.h"

@interface Secondviewcontroller ()

@end

@implementation Secondviewcontroller

-(void) Viewdidload {
[Super Viewdidload];
Set the background color of the main view
Self.view.backgroundcolor=[uicolor Bluecolor]; }2, inCreate navigation bar and root view in Appdelegate AppDelegate.h
#import <UIKit/UIKit.h>
#import "FirstViewController.h"
#import "SecondViewController.h"
@interface Appdelegate:uiresponder <UIApplicationDelegate>

@property (Strong, nonatomic) UIWindow *window;

@end APPDELEGATE.M
#import "AppDelegate.h"

@interface Appdelegate ()

@end

@implementation Appdelegate


-(BOOL) Application: (UIApplication *) application didfinishlaunchingwithoptions: (Nsdictionary *) launchOptions {

Create a View object
Firstviewcontroller *firstvc=[[firstviewcontroller Alloc]init];
Secondviewcontroller *secondvc=[[secondviewcontroller Alloc]init];
Navigation bar Uinavigationcontroller *navigc=[[uinavigationcontroller ALLOC]INITWITHROOTVIEWCONTROLLER:FIRSTVC]; [Email protected] "first";
[Email protected] "4";

[Email protected] "second";
[Email protected] "1";

Uitabbarcontroller *tabbarc=[[uitabbarcontroller Alloc]init];
[Tabbarc SETVIEWCONTROLLERS:@[NAVIGC,SECONDVC]];

Root view
Self.window.rootviewcontroller=tabbarc;


return YES;} 3. Click "4 (First)" and "1 (second)" In the view respectively to switch to the corresponding view.

iOS design multi-view navigation bar Uinavigationcontroller A simple design for switching views