iOS UIWebView 闪烁问题

Question

我在同一屏幕上有一个 UIWebView 和一个滑动手势。当我滑动时，我正在重新加载 webview，因为如果我不这样做，就不会调用 js。

充值只能用一次，刷不了了。

当我删除时 [self.webview reload]滑动完成正常，但 UIWebView 一直闪烁。它每次都跳起来！每次滑动都要调用js

我试过这些：

方法一：

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];
}

方法二：

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

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

方法三：

- (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！

Answer 1

我发现我的 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];
}

iOS UIWebView 闪烁问题

iOS UIWebView flicker issue

javascript

objective-c

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ios