使用prepareForSegue传递UIWebView请求 [英] Pass a UIWebView request using prepareForSegue

问题描述

我是IOS和Objective C的新手。
场景是我有2个按钮，打开（带有segue）2个包含UIWebview的视图控制器。
我认为用1 UIWebView做得更好所以我试图传递webvew的请求对象，只使用一个webview控制器。

I 'm new to IOS and Objective C. The scenario is I have 2 buttons, which open (with segue) 2 view controllers containing a UIWebview. I thought is better to do it with 1 UIWebView so I tried to pass the request object of the webvew and use only one webview controller.

所以我得到了wwwBtn（打开网站的UIButton）和fbBtn（转到Facebook网址的UIButton）我的viewController和包含UIWebView的wwwWebViewController。

so I got the wwwBtn (UIButton that opens a site) and fbBtn (UIButton that goes to a Facebook URL) my viewController and the wwwWebViewController which contains th UIWebView.

这是我的做法它。

viewController.h文件：

The viewController.h file :

@interface ViewController : UIViewController {
    UIButton *wwwBtn;
    UIButton *fbButton;
}
@property (retain, nonatomic) IBOutlet UIButton *wwwBtn;
@property (retain, nonatomic) IBOutlet UIButton *fbBtn;

ViewController.m文件：

The ViewController.m file :

#import "ViewController.h"
#import "wwwWebViewController.h"

@implementation ViewController

@synthesize wwwBtn;
@synthesize fbBtn;

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{        
    if ([[segue identifier] isEqualToString:@"web"]) {
            NSString *urlstr=@"http ://www.google.com";
            wwwWebViewController *vc = [segue destinationViewController];
            vc.urlStr = urlstr;
        } else if ([[segue identifier] isEqualToString:@"fb"]) { 
            NSString *urlstr = @"http://www.facebook.com";
            wwwWebViewController *vc = [segue destinationViewController];
            vc.urlStr = urlstr;
        }
    }

wwwWebViewController.h文件：

the wwwWebViewController.h file :

@interface wwwWebViewController : UIViewController {
    UIWebView *webView;
}

@property (retain, nonatomic) IBOutlet UIWebView *webView;

wwwWebViewController.m文件：

The wwwWebViewController.m file :

    - (void)viewDidLoad
   {
        NSURL *url = [NSURL URLWithString:urlStr];
        NSURLRequest *requestObj = [NSURLRequest requestWithURL:url];
        [webView loadRequest:requestObj];
        [super viewDidLoad];
    }

推荐答案

执行以下操作，将此类分配给目标UIViewControllers，您需要将 NSString * urlstr 传递给它们：

Do as the following, you will assign this class to the destination UIViewControllers that you will need to pass the NSString *urlstr to them:

WebViewController.h

WebViewController.h

@interface WebViewController : UIViewController {
    NSString *urlstr;
}

@property (strong, nonatomic) IBOutlet UIWebView *WebView;
@property (strong, nonatomic) NSString *urlstr;

WebViewController.m

WebViewController.m

@implementation WebViewController

@synthesize WebView;
@synthesize urlstr;

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view.

    NSURL *url = [NSURL URLWithString:urlstr];
    NSURLRequest *requestObj = [NSURLRequest requestWithURL:url];
    [self.WebView loadRequest:requestObj];

}

现在是时候从我的主故事板类创建两个segue了InfoViewController到目标类WebViewController，在我的例子中我创建了三个segues但只有两个使用了WebViewController类。

Now it's time to create two segues from my main storyboard class InfoViewController to the destination class WebViewController, in my case I've created three segues but only two are using the WebViewController class.

您还要为每个segue提供一个空间标识符它们以编程方式在主类InfoViewController中。

You've also to give the segues a spacial Identifier for each to target them programmatically in the main class InfoViewController.

让我们看一下InfoViewController：UITableViewController的样子：

let's check out how the InfoViewController : UITableViewController will look like:

InfoViewController.m

InfoViewController.m

#import "InfoViewController.h"
#import "WebViewController.h"

@interface InfoViewController ()

@end

@implementation InfoViewController

@synthesize AboutCell = _AboutCell;
@synthesize CGCell = _CGCell;
@synthesize FTACell = _FTACell;

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view from its nib.
}

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    UITableViewCell *AboutCellClicked = [self.tableView cellForRowAtIndexPath:indexPath];
    UITableViewCell *CGCellClicked = [self.tableView cellForRowAtIndexPath:indexPath];
    UITableViewCell *FTACellClicked = [self.tableView cellForRowAtIndexPath:indexPath];

    if (AboutCellClicked == _AboutCell) {
        [self performSegueWithIdentifier:@"AboutPush" sender:self];
    } else if (CGCellClicked == _CGCell) {
        [self performSegueWithIdentifier:@"CGPush" sender:self];
    } else if (FTACellClicked == _FTACell) {
        [self performSegueWithIdentifier:@"FTAPush" sender:self];
    }

}

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
    WebViewController *webController = [[WebViewController alloc] init];

    if ([[segue identifier] isEqualToString:@"CGPush"]) {
        NSString *urlstr=@"http://www.google.com";
        webController = [segue destinationViewController];
        webController.urlstr = urlstr;
    } else if ([[segue identifier] isEqualToString:@"FTAPush"]) {
        NSString *urlstr=@"http://www.yahoo.com";
        webController = [segue destinationViewController];
        webController.urlstr = urlstr;
    }
}

@end

I希望这能解决您的问题，如果您有任何疑问，请不要犹豫。

I hope this will solve your problem, If you have any question do not hesitate to ask.

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