UiWebView 委托方法没有被调用答案

【问题标题】：UiWebView delegate methods not getting calledUiWebView 委托方法没有被调用
【发布时间】：2017-05-04 08:19:39
【问题描述】：

我正在尝试在 webView 中播放 youtube 嵌入视频，当我没有设置委托时它会播放，如果我设置委托视频不会加载并且委托方法也不会被调用。这是我的代码：

.m 类

#import "EmbeddedVideoVC.h"

@interface EmbeddedVideoVC (){
    MBProgressHUD *hud;
}
//@property (weak, nonatomic) IBOutlet UIWebView *webView;
@property (weak, nonatomic) IBOutlet UIView *viewSelf;

@property (strong, nonatomic) NSTimer *controllersTimer;
@property (assign, nonatomic) NSInteger controllersTimeoutPeriod;

@end

@implementation EmbeddedVideoVC

- (void)viewDidLoad {
    [super viewDidLoad];
    self.view.transform = CGAffineTransformMakeRotation(M_PI/2);       
}

-(void)viewDidAppear:(BOOL)animated{
    [super viewDidAppear:animated];
    CGRect bounds = [[UIScreen mainScreen] bounds];
    if ([SharedAppManager sharedInstance].applicationFrame.size.height < 568) {
        bounds = CGRectMake(0, 0, 480, 320);
    }
    _videoWebView = [[UIWebView alloc] initWithFrame:CGRectMake(0, 0,bounds.size.height, bounds.size.width)];
    [_videoWebView setAllowsInlineMediaPlayback:YES];
    [_videoWebView setMediaPlaybackRequiresUserAction:NO];

    [self.viewSelf addSubview:_videoWebView];

    hud = [MBProgressHUD showHUDAddedTo:_videoWebView animated:YES];
    hud.color = [UIColor clearColor];
    hud.activityIndicatorColor = [UIColor whiteColor];

    UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(didTapMethod)];
    [tap setNumberOfTapsRequired:1]; // Set your own number here
    [tap setDelegate:self]; // Add the <UIGestureRecognizerDelegate> protocol
    [_videoWebView addGestureRecognizer:tap];
    _videoWebView.delegate= self;
    [_videoWebView loadHTMLString:self.embeddedCode baseURL:nil];
    [self hideControllers];

}
 -(void)didTapMethod{
     //Showing Controls
}
#pragma mark - WEBVIEW DELEGATES

- (void)webViewDidStartLoad:(UIWebView *)webView{
    [MBProgressHUD hideHUDForView:self.videoWebView animated:YES];
}
- (void)webView:(UIWebView *)webView didFailLoadWithError:(NSError *)error
{
   [MBProgressHUD hideHUDForView:self.videoWebView animated:YES];
}
-(void)webViewDidFinishLoad:(UIWebView *)webView {
   [MBProgressHUD hideHUDForView:self.videoWebView animated:YES];
}
- (BOOL)prefersStatusBarHidden {

    return YES;
}


- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer
    {
        return YES;
    }

-(void)hideControllers { 
    [UIView animateWithDuration:0.5f animations:^{
    dispatch_async(dispatch_get_main_queue(), ^{ 
       topView.hidden= YES; 
    }); 
    } completion:^(BOOL finished){ 
    }]; 
}


-(void) showControles {

}

@end

.h 类

#import "MusicParentVC.h"

@interface EmbeddedVideoVC : MusicParentVC <UIGestureRecognizerDelegate, UIWebViewDelegate>

@property (strong, nonatomic)  NSString *embeddedCode;
@property (nonatomic, strong) UIWebView *videoWebView;
@end

任何人都可以告诉我问题是什么以及为什么 webViewDidFinishLoad: 和其他委托方法没有被调用，甚至嵌入的代码没有在 webview 中加载？

【问题讨论】：

“hideControllers”方法在哪里？你能把那个代码也贴一下吗？
- (void)hideControllers { [UIView animateWithDuration:0.5f 动画:^{ dispatch_async(dispatch_get_main_queue(), ^{ topView.hidden= YES; }); } 完成：^(BOOL 完成){ }]; }

标签： ios objective-c iphone uiwebview

【解决方案1】：

1) 请确保您在当前班级视图或任何顶视图上添加 Web 视图。

2) 您是否在情节提要中添加 viewSelf？因为我无法以编程方式看到它。确保它，因为您正在将 web 视图添加到 viewSelf。

3) 在 hideControllers 中，您隐藏了一些 topView。确保它不是当前类 topView。

这是为我工作的代码（委托方法也在调用），

_videoWebView = [[UIWebView alloc] initWithFrame:CGRectMake(0, 0,self.view.frame.size.width, self.view.frame.size.height)];
[_videoWebView setAllowsInlineMediaPlayback:YES];
[_videoWebView setMediaPlaybackRequiresUserAction:NO];


UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(didTapMethod)];
[tap setNumberOfTapsRequired:1]; // Set your own number here
[tap setDelegate:self]; // Add the <UIGestureRecognizerDelegate> protocol
[_videoWebView addGestureRecognizer:tap];
_videoWebView.delegate= self;


NSURL *nsurl=[NSURL URLWithString:@"http://www.google.com"];
NSURLRequest *nsrequest=[NSURLRequest requestWithURL:nsurl];
[_videoWebView loadRequest:nsrequest];
[self.view addSubview:_videoWebView];

希望这会有所帮助。

【讨论】：

【解决方案2】：

只需将您的UIWebView 相关代码放在viewDidAppear: 方法中即可。

参考：https://stackoverflow.com/a/27647327/2284065

【讨论】：