iOS UIWebView闪烁问题

时间:2016-09-23 09:44:28

标签: javascript ios objective-c uiwebview

我在同一个屏幕上有一个UIWebView和一个滑动手势。当我正在刷卡时,我正在重新加载webview,因为如果我没有,则不会调用js。

重新加载仅运行一次,我无法再次滑动

当我删除[self.webview reload]滑动完成时,UIWebView会保持闪烁。它每次都会跳起来! 我每次刷卡都需要拨打电话。

我试过这些:

方法1:

when loading webview:
 self.webview.alpha = 0;

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

    [UIView beginAnimations:nil context:nil];    
    [UIView setAnimationDuration:0.30];    
    self.webview.alpha = 1;
    [UIView commitAnimations];
}

方法2:

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

    [self.webview setOpaque:NO];
    self.webview.backgroundColor = [UIColor clearColor];
  }

方法3:

- (void)viewDidLoad {
    [super viewDidLoad];

    [self.webview loadHTMLString:@"<html><body style=\"background-color:black;\"></body></html>" baseURL:nil];    

    [self performSelector:@selector(loadWebview) withObject:nil afterDelay:0.1];
}
-(void)loadWebview {

    self.webview.delegate = self;
    self.webview.scrollView.delegate = self;
    self.webview.scrollView.bounces = NO;
    self.webview.scrollView.scrollsToTop = NO;
    [self.view addSubview:self.webview];
    pathToHtml = [[NSBundle mainBundle] pathForResource:@"mypath" ofType:@"html"];
    NSString* appHtml = [NSString stringWithContentsOfFile:pathToHtml encoding:NSUTF8StringEncoding error:nil];
    NSURL *baseURL = [NSURL fileURLWithPath:pathToHtml];

    [self.webview loadHTMLString:appHtml baseURL:baseURL]; 
}

需要帮助!

1 个答案:

答案 0 :(得分:0)

我发现我在webViewDidFinishLoad

中有这个
  //Make the page fit to view. THIS IS BAD
    CGRect webviewBound = self. webview.bounds;
    webviewBound.size.height = self. webview.scrollView.contentSize.height;
    self. webview.bounds = webviewBound;

所以我删除了它并添加了:

  [self.webview.scrollView setContentSize: CGSizeMake(self.webview.frame.size.width, self.webview.scrollView.contentSize.height)];
    self.webview.scrollView.delegate = self;

我在viewDidLoad中添加了这个,因为我有灰色背景:

//Removes the shadow from the webview i.e., "grey background"
if ([[self.webview subviews] count] > 0)
{
    for (UIView* shadowView in [[[self.webview subviews] objectAtIndex:0] subviews])
    {
        [shadowView setHidden:YES];
    }

    // unhide the last view so it is visible again because it has the content
    [[[[[self.webview subviews] objectAtIndex:0] subviews] lastObject] setHidden:NO];
}