iOS Development UI Article-a Brief Introduction to multiple controllers and navigation controllers

Last Update:2015-10-13 Source: Internet

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iOS Development UI Article-a Brief Introduction to multiple controllers and navigation controllersone, Multi-controllerAn iOS app rarely consists of a single controller, unless the app is extremely simple. When there are multiple controllers in the app, we need to manage these controllersWhen there are multiple view, you can use a large view to manage 1 or more small view, the controller is the same, with 1 controllers to manage the other multiple controllersFor example, use a controller A to manage 3 controllers b, C, D. Controller A is referred to as the "parent controller" of controller b, c, d, and the "sub-controller" of controller b, c, d, which is called Controller A.To facilitate the management of the controller, iOS offers 2 more special controllersUinavigationcontrollerUitabbarcontrollersecond, Navigation ControllerWith uinavigationcontroller, you can easily manage multiple controllers and easily switch between controllers, typically the System's own "settings" appthird, the use of uinavigationcontroller steps(1) Initialize Uinavigationcontroller(2) set UIWindow Rootviewcontroller to Uinavigationcontroller(3) depending on the situation, add the corresponding number of sub-controllers by the push method<pre>1#import"YYAppDelegate.h"2#import"YYOneViewController.h"34@implementationYyappdelegate56-(BOOL) application: (uiapplication *) application didfinishlaunchingwithoptions: (nsdictionary *) launchoptions7{8 Self.window =[[uiwindow alloc] Initwithframe:[[uiscreen mainscreen] bounds];9 Self.window.backgroundColor =[uicolor whitecolor];1011//1. Create a navigation controllerUinavigationcontroller *nav=[[uinavigationcontroller alloc]init];13//2. Set the navigation controller as the root view of windowSelf.window.rootviewcontroller=Nav151617//3. Adding a child controller to the navigation controller18//Create some controllersUiviewcontroller *c1=[[uiviewcontroller alloc]init];20//Set C1 view color for this controllerC1.view.backgroundcolor=[uicolor redcolor];22Uiviewcontroller *c2=[[uiviewcontroller alloc]init];C2.view.backgroundcolor=[uicolor purplecolor];25Uiviewcontroller *c3=[[uiviewcontroller alloc]init];27 c3.view.backgroundcolor=[uicolor browncolor];28 29 //30 [nav pushviewcontroller:c1 animated : YES]; 31 [nav pushviewcontroller:c2 Animated:yes];32 [nav pushviewcontroller:c3 Animated:yes];34 [self.window Makekeyandvisible];35 return Yes; </pre>Running the emulator, you can see a primitive with three sub-controllers managing the Page.But now we can only have an interface, we do not need to create three controller at a time to wait Here.Requirements: create three sub-controllers, each with a button on the View's interface, click to jump to the next Screen.Implementation (complete three pages with a simple jump via buttons):Note: the creation of the first Sub-controller is written in the proxy method.YYAPPDELEGATE.M File Code<pre>1//2//Yyappdelegate.m3//01-use of the Navigation controller 14//5//Created by Apple on 14-6-4.6//Copyright (c) 2014 Itcase. All Rights Reserved.7//89#import"YYAppDelegate.h"10#import"YYOneViewController.h"1112@implementationYyappdelegate13-(BOOL) application: (uiapplication *) application didfinishlaunchingwithoptions: (nsdictionary *) launchoptions15{Self.window =[[uiwindow alloc] Initwithframe:[[uiscreen mainscreen] bounds];Self.window.backgroundColor =[uicolor whitecolor];1819//1. Create a navigation controllerUinavigationcontroller *nav=[[uinavigationcontroller alloc]init];21st//2. Set the navigation controller as the root view of windowSelf.window.rootviewcontroller=Nav232425//3. Adding a child controller to the navigation controllerYyoneviewcontroller *one=[[yyoneviewcontroller alloc]init];27[nav Pushviewcontroller:one animated:yes];2829[self.window makekeyandvisible];30ReturnYES;313233////Create some controllers34//Uiviewcontroller *c1=[[uiviewcontroller alloc]init];35////Set C1 view color for this controller36//C1.view.backgroundcolor=[uicolor redcolor];37//38//Uiviewcontroller *c2=[[uiviewcontroller alloc]init];39//C2.view.backgroundcolor=[uicolor purplecolor];40//41// Uiviewcontroller *c3=[[uiviewcontroller alloc]init]; 42 //43 //44 ////add These controllers to the navigation controller 45 // [nav pushviewcontroller:c1 Animated:yes];46 // [nav pushviewcontroller:c2 Animated:yes];47 // [nav pushviewcontroller:c3 Animated:yes];48} </pre>Create three child control classes and their corresponding xib filesYYONEVIEWCONTROLLER.M file<pre>1//2//Yyoneviewcontroller.m3//01-use of the Navigation controller 14//5//Created by Apple on 14-6-4.6//Copyright (c) 2014 Itcase. All Rights Reserved.7//89#import"YYOneViewController.h"10#import"YYTwoViewController.h"1112@interfaceYyoneviewcontroller ()13/**14Jump to the second interface15*/-(ibaction) Jump2two: (Id) sender;1718@end1920@implementationYyoneviewcontroller21st22-(ibaction) Jump2two: (Id) Sender {24//1. Create a second sub-controller 25 Yytwoviewcontroller *two=[[yytwoviewcontroller alloc]init]; 27 //2. The handle controller is added to the navigation controller 28 //29 //30 [ Self.navigationcontroller Pushviewcontroller:two animated:yes]; 31 }32 @end </pre>YYTWOVIEWCONTROLLER.M file<pre>1//2//Yytwoviewcontroller.m3//01-use of the Navigation controller 14//5//Created by Apple on 14-6-4.6//Copyright (c) 2014 Itcase. All Rights Reserved.7//89#import"YYTwoViewController.h"10#import"YYThreeViewController.h"11@interfaceYytwoviewcontroller ()-(ibaction) Jump2three: (Id) sender;1314@end1516@implementationYytwoviewcontroller1718// Jump to the third Sub-controller 19-( Ibaction) jump2three: (id20 //1. Create a third child controller 21 Yythreeviewcontroller *three=[[yythreeviewcontroller alloc]init];22 //2. Adding a child controller to the navigation controller 23 [self.navigationcontroller pushviewcontroller: Three animated:yes]; 24 25 }26 @end </pre>Tip: as long as the current controller is a child controller of the navigation controller, you can get directly to the navigation controller where the current controller is located through the Self.navigationcontroller propertyProject file structure and run Effect:iOS Development UI Article-a Brief Introduction to multiple controllers and navigation controllers

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iOS Development UI Article-a Brief Introduction to multiple controllers and navigation controllers

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