Xcode 5 在带有 WebView 的新视图控制器中加载 URL

Xcode 5 Loading a URL in a new View Controller with a WebView in it

提问by Alioo

It seems that all the methods in earlier versions of Xcode are not working for me.

似乎早期版本的 Xcode 中的所有方法都不适用于我。

What I have right now:
I have a main menu with a button that segues into another view with a different controller with a WebView in it (has a property so the URL to load can be set)

我现在
拥有的：我有一个带有按钮的主菜单，该按钮可以连接到另一个带有 WebView 的不同控制器的视图（有一个属性，因此可以设置要加载的 URL）

What I want: When I load that view from that button I want to pass a string from the first view to the new view that represents the URL and load it in the web view. Basically I want a generic WebView view that can load different URLs passed by the views that segue to it.

我想要什么：当我从该按钮加载该视图时，我想将第一个视图中的字符串传递给表示 URL 的新视图，并将其加载到 Web 视图中。基本上我想要一个通用的 WebView 视图，它可以加载由连接到它的视图传递的不同 URL。

Here is the code for the WebView H file

这是 WebView H 文件的代码

#import <UIKit/UIKit.h>

@interface BRWebView : UIViewController
{
    IBOutlet UIWebView *requestWebView;

}
@property (strong, nonatomic) NSString *loadUrl;

@end

In the ViewController for the MainMenu there is this for the button listener

在 MainMenu 的 ViewController 中，按钮侦听器有这个

-(IBAction)requestButton:(id)sender
{
    BRWebView *web = [self.storyboard    instantiateViewControllerWithIdentifier:@"BRWebView"];
    web.loadUrl = @"Websitename.com";
    [self presentModalViewController:web animated:YES];

}

And in the BRWebView.m file there is this

在 BRWebView.m 文件中有这个

- (void)viewDidLoad
{

    [super viewDidLoad];

    NSURL *url = [NSURL URLWithString:_loadUrl];
    NSURLRequest *request = [NSURLRequest requestWithURL:url];
    [requestWebView loadRequest:request];
}

回答by Jordan Montel

EDIT after code in the question :

在问题中的代码后编辑：

In the ViewControllerreplace your code by :

在ViewController将您的代码替换为：

- (IBAction)requestButton:(id)sender
{
    BRWebView *web = [self.storyboard instantiateViewControllerWithIdentifier:@"BRWebView"];
    web.loadUrl = @"http://websitename.com";
    [self presentViewController:web animated:YES completion:nil];
}

and in the BRWebView.mremove your code in viewDidLoadand add viewWillAppear:

并在viewDidLoad 中BRWebView.m删除您的代码并添加viewWillAppear：

- (void)viewWillAppear:(BOOL)animated
{
    [super viewWillAppear:animated];

    // URL Request Object
    NSURLRequest *requestObj = [NSURLRequest requestWithURL:[NSURL URLWithString:_loadUrl]];

    // Load the request in the UIWebView
    [_requestWebView loadRequest:requestObj];
}

Old answer :

旧答案：

You need to pass your URL data with a property like this (without navigation controller):

您需要使用这样的属性（没有导航控制器）传递您的 URL 数据：

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
    if ([[segue identifier] isEqualToString:@"showDetail"]) 
    {
        // Get reference to the destination view controller
        ViewControllerB *viewControllerB = segue.destinationViewController;

        // Pass URL
        viewControllerB.webviewURL = @"http://myurl.com";
    }
}

with navigation controller :

带导航控制器：

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
    if ([[segue identifier] isEqualToString:@"showDetail"]) 
    {
        UINavigationController *navController = (UINavigationController *)segue.destinationViewController;
        ViewControllerB *viewControllerB = (ViewControllerB *)navController.topViewController;

        // Pass URL
        viewControllerB.webviewURL = @"http://myurl.com";
    }
}

On your second view .h:

在您的第二个视图 .h 中：

@property (nonatomic, strong) NSString *webviewURL;

second view .m:

第二个视图 .m：

- (void)viewWillAppear:(BOOL)animated
{
    [super viewWillAppear:animated];

    // URL Request Object
    NSURLRequest *requestObj = [NSURLRequest requestWithURL:[NSURL URLWithString:_webviewURL]];

    // Load the request in the UIWebView
    [self.webView loadRequest:requestObj];
}

回答by JeroValli

You should set the URL(NSString) property before perform the segue to your destination view controller, and load the request on the 'viewWillAppear' callback:

您应该在对目标视图控制器执行转场之前设置 URL(NSString) 属性，并在“viewWillAppear”回调上加载请求：

- (void)viewWillAppear:(BOOL)animated
{
    [super viewWillAppear:animated];

    if (self.loadUrl) {
        [self.requestWebView loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:self.loadUrl]]];
    }
}

回答by Anand Kr. Avasthi

//Easy code for web view

//网页视图的简单代码

- (void)viewDidLoad { 
    [super viewDidLoad]; // self.myWebView.delegate=self; 
    NSString   *urlString=@"http://www.google.com"; 
    NSURL *url=[NSURL URLWithString:urlString];
    NSURLRequest *obj=[NSURLRequest requestWithURL:url]; 
    [self.myWebView loadRequest:obj]; // Do any additional setup after loading the view, typically from a nib. 
}