UIWebView中Html中用JS调用OC方法及OC执行JS代码

HTML代码：

   

       

        http-equiv="Content-Type"content="text/html; charset=UTF-8">

       

   

        

       

       

       

        href='ios://openMyAlbum'>打开相机

            

        href = 'ios://openMyCamera'>打开相册

                

   

    

#OBJECT-C

-(BOOL)webView:(UIWebView*)webView shouldStartLoadWithRequest:(NSURLRequest*)request navigationType:(UIWebViewNavigationType)navigationType

{
    
    
    
    NSString
    
    *urlstr = request.URL.absoluteString;
    
    NSRange
    
    range = [urlstr
             rangeOfString:@"ios://"];
    
    if
        
        (range.length!=0)
    {
        
        NSString
        
        *method = [urlstr
                   substringFromIndex:(range.location+range.length)];
        
        SEL
        
        selctor = NSSelectorFromString(method);
        
        [self
         
         performSelector:selctor
         
         withObject:nil];
        
    }
    
    return
    
    YES;
    
}



-(void)openMyAlbum

{
    
    UIImagePickerController
    
    *vc = [[UIImagePickerController
            
            alloc]init];
    
    vc.sourceType
    
    = UIImagePickerControllerSourceTypePhotoLibrary;
    
    [self
     
     presentViewController:vc
     
     animated:YES
     
     completion:nil];
    
}



-(void)openMyCamera

{
    [_webView stringByEvaluatingJavaScriptFromString:@"test();"];
        
    return;
    
    UIImagePickerController
    
    *vc = [[UIImagePickerController
            
            alloc]init];
    
    vc.sourceType
    
    = UIImagePickerControllerSourceTypeCamera;
    
    [self
     
     presentViewController:vc
     
     animated:YES
     
     completion:nil];
    
}


- (void)viewDidLoad {
    [super viewDidLoad];
    
    
    _webView = [[UIWebView alloc] initWithFrame:self.view.bounds];
    [self.view addSubview:_webView];
    
    NSString *path = [[NSBundle mainBundle] pathForResource:@"test.html" ofType:nil];
    
    NSURL *url = [NSURL fileURLWithPath:path];
    NSURLRequest *req = [[NSURLRequest alloc] initWithURL:url];
    
    _webView.delegate   = self;
    _webView.dataDetectorTypes  = UIDataDetectorTypeAll;
    
    [_webView loadRequest:req];
    // Do any additional setup after loading the view, typically from a nib.
}