點擊按鈕後在UIWebView中打開網頁

Question

我需要幫助。我有兩個按鈕，我需要每個按鈕來在我的UIWebView中打開不同的網頁（例如：button1打開網站apple.com，button2打開google.com）。我找不到任何幫助我的教程。 Thx尋求幫助（我使用Storyboard）。

有我的代碼，但什麼是錯的，因爲我只看到一個黑色的屏幕

TabulkaViewController.m

UIButton *myButton = [UIButton buttonWithType:UIButtonTypeRoundedRect]; 
    myButton.frame = CGRectMake(10, 240, 300, 35); 
    [myButton setTitle:@"Buttonone" forState:UIControlStateNormal]; 
    [myButton addTarget:self action:@selector(myButtonClick:) forControlEvents:UIControlEventTouchUpInside]; 
    [self.view addSubview: myButton]; 
} 
-(void) myButtonClick:(NSString *)myString 
{ 
    NSURL *url = [NSURL URLWithString:@"http://www.apple.com/"]; 
    WebViewController *viewWeb = [[WebViewController alloc] initWithURL:url andTitle:@"Apple"]; 
    [self presentViewController:viewWeb animated:YES completion:nil]; 

} 

WebViewController.h

（點擊該按鈕後）

#import <UIKit/UIKit.h> 

@interface WebViewController : UIViewController <UIWebViewDelegate> 
{ 
NSURL *theURL; 
NSString *theTitle; 
IBOutlet UINavigationItem *webTitle; 
} 
- (id)initWithURL:(NSURL *)url; 
- (id)initWithURL:(NSURL *)url andTitle:(NSString *)string; 
@property (strong, nonatomic) IBOutlet UIWebView *viewWeb; 
@end 

WebViewController.m

#import "WebViewController.h" 
@implementation WebViewController 

- (void)viewDidLoad 
{ 
    [super viewDidLoad]; 
    webTitle.title = theTitle; 
    NSURLRequest *requestObject = [NSURLRequest requestWithURL:theURL]; 
    [_viewWeb loadRequest:requestObject]; 
} 
- (void)didReceiveMemoryWarning 
{ 
    [super didReceiveMemoryWarning]; 
} 
- (id)initWithURL:(NSURL *)url andTitle:(NSString *)string { 
    if(self = [super init]) { 
     theURL = url; 
     theTitle = string; 
    } 
    return self; 
} 
-(id)initWithURL:(NSURL *)url { 
    return [self initWithURL:url andTitle:nil]; 
} 
- (void)viewWillDisappear:(BOOL)animated { 
    [super viewWillDisappear:animated]; 
    _viewWeb.delegate = nil; 
    [_viewWeb stopLoading]; 
} 
@end 

Answer 1

當使用故事板時，如果您將項目文件上傳到某處，將會有所幫助。

但是從經驗，你需要的網頁視圖的委託設置爲你的類WebViewController

您可以在您的viewDidLoad中添加此做：

self.webView.delegate = self; 

，那麼你必須實現shouldStartLoadWithRequest代表來電，這是一個好的開始。

- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType 
{ 
    return YES; 
} 

讓我知道這是否修復它。

編輯： 檢查項目後，改變WebViewController - >viewDidLoad中這樣：

- (void)viewDidLoad 
{ 
    [super viewDidLoad]; 
    // init webview 
    _viewWeb = [[UIWebView alloc] initWithFrame:self.view.frame]; 

    _viewWeb.delegate = self; 

    // add it to this controller's view 
    [self.view addSubview:_viewWeb]; 

    webTitle.title = theTitle; 
    NSURLRequest *requestObject = [NSURLRequest requestWithURL:theURL]; 

    [self.viewWeb loadRequest:requestObject]; 
} 

您_viewWeb未初始化，因爲我懷疑，看我如何初始化意見它以及如何將它添加到你的WebViewController

EDIT2：所 在Web視圖採取全屏加限制，我建議你閱讀機在蘋果文檔關於自動佈局

- (void)viewDidLoad 
{ 
    [super viewDidLoad]; 
    // init webview 
    _viewWeb = [[UIWebView alloc] initWithFrame:self.view.frame]; 

    _viewWeb.delegate = self; 

    // add it to this controller's view 
    [self.view addSubview:_viewWeb]; 


    // add constraints 
    NSDictionary* dict = @{@"viewWeb":_viewWeb}; 
    _viewWeb.translatesAutoresizingMaskIntoConstraints = NO; 
    NSArray* constraints = [NSLayoutConstraint constraintsWithVisualFormat:@"H:|-0-[viewWeb]-0-|" options:0 metrics:nil views:dict]; 
    [self.view addConstraints:constraints]; 
    constraints = [NSLayoutConstraint constraintsWithVisualFormat:@"V:|-0-[viewWeb]-0-|" options:0 metrics:nil views:dict]; 
    [self.view addConstraints:constraints]; 

    webTitle.title = theTitle; 
    NSURLRequest *requestObject = [NSURLRequest requestWithURL:theURL]; 

    [self.viewWeb loadRequest:requestObject]; 
}