ios - webViewDidFinishLoad 不工作？

Question

在我的应用程序中，我试图在加载 UIWebView 时显示初始图像，因此它不仅仅是一个空白屏幕。但是我的 webViewDidFinishLoad 方法不起作用。这意味着一旦 UIWebView 加载，启动图像就会出现但不会从屏幕上消失。

我的方法代码是:

- (void)webViewDidFinishLoad:(UIWebView *)webView {
     NSLog(@"content loading finished");
    [loadingImageView removeFromSuperview];  
}

任何有关为什么该方法不起作用的帮助将不胜感激。

我的.h:

@interface ViewController : UIViewController

-(IBAction)makePhoneCall:(id)sender;

@property (nonatomic, strong) IBOutlet UIWebView *webView;
@property(nonatomic, strong) UIImageView *loadingImageView;

@end

我的 ViewDidLoad 和 webViewDidFinishLoading:

- (void)viewDidLoad {
    UIWebView *mWebView = [[UIWebView alloc] init];
    mWebView.delegate = self;
    mWebView.scalesPageToFit = YES;

    [super viewDidLoad];
}


//**************** Set website URL for UIWebView
[webView loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:@"http://www.sleafordpizza.com/food"]]];


//**************** Add Static loading image to prevent white "flash" ****************/
UIImage *loadingImage = [UIImage imageNamed:@"LittleItalyLogo.png"];
loadingImageView = [[UIImageView alloc] initWithImage:loadingImage];
loadingImageView.animationImages = [NSArray arrayWithObjects:
                                    [UIImage imageNamed:@"LittleItalyLogo.png"],
                                    nil];
[self.view addSubview:loadingImageView];

}

- (void)webViewDidFinishLoad:(UIWebView *)webView {
     NSLog(@"content loading finished");
    // Remove loading image from view
    [loadingImageView removeFromSuperview];
}

Answer 1

嗨，您可能没有设置正确的代表。

这是给你的小代码提示。

-(void)viewDidLoad {

    mWebView = [[UIWebView alloc] init];
    mWebView.delegate = self;
    mWebView.scalesPageToFit = YES;
}

-(void)webViewDidFinishLoad:(UIWebView *)webView {

  [loadingImageView removeFromSuperview];  
   NSLog(@"finish");   
}

在你的 .h 文件中添加。

@interface MyView: UIViewController <UIWebViewDelegate> {
           UIWebView *webView;
}

代码修复。

对于 .h 文件

@interface ViewController : UIViewController<UIWebViewDelegate>


-(IBAction)makePhoneCall:(id)sender;

@property (nonatomic, strong) IBOutlet UIWebView *webView;
@property(nonatomic, strong) UIImageView *loadingImageView;


@end

对于 .m 文件

- (void)viewDidLoad
{


[super viewDidLoad];

webView.delegate = self;

//**************** Set website URL for UIWebView
[webView loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:@"http://www.sleafordpizza.com/food"]]];


//**************** Add Static loading image to prevent white "flash" ****************/
UIImage *loadingImage = [UIImage imageNamed:@"LittleItalyLogo.png"];
loadingImageView = [[UIImageView alloc] initWithImage:loadingImage];
loadingImageView.animationImages = [NSArray arrayWithObjects:
                                    [UIImage imageNamed:@"LittleItalyLogo.png"],
                                    nil];
[self.view addSubview:loadingImageView];

}