如何从当前窗口界面切换到另一个窗口界面

xiaoxiao2021-03-01  150

 

如何从当前窗口界面切换到另一个窗口界面

 

在程序中,经常会在不同的窗口界面中互相切换。本文,将介绍如何进行窗口界面的切换。

 

下面采用的示例以文章《在程序代码中设定控件调用的方法 》代码为基础。

 

操作处理过程:

(1)新建一个窗口视图;

(2)调用打开新建的窗口视图;

 

 

第1步:新建一个窗口视图

 

鼠标选中项目的classes目录,鼠标右键选中菜单 [Add > New File...].

 

在界面上选择[iOS > Cocoa Touch Class > UIViewController subclass ],并且选中 With XIB for user interface.

 

新建的视图取名为 NewViewController  .

 

打开文件 NewViewController.xib  ,在界面上增加一个按钮(标题设为 back)。

 

修改  NewViewController.h  文件:

 

#import <UIKit/UIKit.h> @interface NewViewController : UIViewController { }-(IBAction)backButtonClicked:(id)sender; @end

修改  NewViewController.m  文件:

 

 

#import "NewViewController.h" @implementation NewViewController -(IBAction)backButtonClicked:(id)sender{ [self.view removeFromSuperview]; } // The designated initializer.  Override if you create the controller programmatically and want to perform customization that is not appropriate for viewDidLoad. /* - (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil {     self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];     if (self) {         // Custom initialization.     }     return self; } */ /* // Implement viewDidLoad to do additional setup after loading the view, typically from a nib. - (void)viewDidLoad {     [super viewDidLoad]; } */ /* // Override to allow orientations other than the default portrait orientation. - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {     // Return YES for supported orientations.     return (interfaceOrientation == UIInterfaceOrientationPortrait); } */ - (void)didReceiveMemoryWarning {     // Releases the view if it doesn't have a superview.     [super didReceiveMemoryWarning];     // Release any cached data, images, etc. that aren't in use. } - (void)viewDidUnload {     [super viewDidUnload];     // Release any retained subviews of the main view.     // e.g. self.myOutlet = nil; } - (void)dealloc {     [super dealloc]; } @end

 

然后,在  NewViewController.xib  中将按钮控件的点击事件绑定方法backButtonClicked。

 

 

 

第2步:调用打开新建的窗口视图;

 

修改 FirstViewController.m  文件:

 

 

#import "FirstViewController.h" #import "NewViewController.h" @implementation FirstViewController NewViewController *newViewController; @synthesize label,button; -(IBAction)myButtonClicked:(id)sender{ newViewController=[[NewViewController alloc] initWithNibName:@"NewViewController" bundle:nil]; [self.view addSubview:newViewController.view]; /*UIAlertView *alert=[[UIAlertView alloc] initWithTitle:@"my alert"   message:@"button is clicked" delegate:self cancelButtonTitle:@"Ok" otherButtonTitles: nil]; [alert show]; [alert release]; */ } // The designated initializer.  Override if you create the controller programmatically and want to perform customization that is not appropriate for viewDidLoad. /* - (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil {     self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];     if (self) {         // Custom initialization.     }     return self; } */ /* // Implement loadView to create a view hierarchy programmatically, without using a nib. - (void)loadView { } */ // Implement viewDidLoad to do additional setup after loading the view, typically from a nib. - (void)viewDidLoad { //create the label CGRect frame=CGRectMake(50, 30, 200, 45); label=[[UILabel alloc] initWithFrame:frame]; label.text=@"This is a label"; //create the button frame=CGRectMake(50, 100, 200, 45); button=[UIButton buttonWithType:UIButtonTypeRoundedRect]; button.frame=frame; [button setTitle:@"OK" forState:UIControlStateNormal]; [button addTarget:self   action:@selector(myButtonClicked:) forControlEvents:UIControlEventTouchUpInside]; //add the label and button into current view. [self.view addSubview:label]; [self.view addSubview:button];     [super viewDidLoad]; } /* // Override to allow orientations other than the default portrait orientation. - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {     // Return YES for supported orientations.     return (interfaceOrientation == UIInterfaceOrientationPortrait); } */ - (void)didReceiveMemoryWarning {     // Releases the view if it doesn't have a superview.     [super didReceiveMemoryWarning];     // Release any cached data, images, etc. that aren't in use. } - (void)viewDidUnload {     [super viewDidUnload];     // Release any retained subviews of the main view.     // e.g. self.myOutlet = nil; } - (void)dealloc { [newViewController release]; [label release]; [button release];     [super dealloc]; } @end

 

 

执行后,点击界面上的[OK]按钮,即显示新建的窗口视图;再点击新窗口视图的[back]按钮,即显示前一窗口。

 

 

 

 

 

 

 

 

 

 

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