旋轉UIView並填充屏幕

在我的iOS應用程序中，我必須有條件地旋轉WKWebView並希望WebView填充整個屏幕（減去頂部工具欄）。我可以旋轉WebView，但它似乎並沒有填滿整個屏幕。旋轉UIView並填充屏幕

這是我目前有：

發起web視圖：

self.webView = [[WKWebView alloc]initWithFrame:CGRectZero]; 
self.webView.navigationDelegate = self; 

[self.view addSubview:self.webView]; 

self.webView.translatesAutoresizingMaskIntoConstraints = NO; 

height = [NSLayoutConstraint constraintWithItem:self.webView attribute:NSLayoutAttributeHeight relatedBy:NSLayoutRelationEqual toItem:self.view attribute:NSLayoutAttributeHeight multiplier:1 constant:0]; 

width = [NSLayoutConstraint constraintWithItem:self.webView attribute:NSLayoutAttributeWidth relatedBy:NSLayoutRelationEqual toItem:self.view attribute:NSLayoutAttributeWidth multiplier:1 constant:0]; 

[self.view addConstraint:height]; 
[self.view addConstraint:width]; 
[self.webView loadRequest:request];

然後在didFinishNavigation，我接收來自其確定web視圖是否需要被旋轉時，服務器的響應：

- (void)webView:(WKWebView *)webView didFinishNavigation:(WKNavigation *)navigation 
{ 
    NSURLComponents *params = [NSURLComponents componentsWithURL:self.webView.URL resolvingAgainstBaseURL:NO]; 
    NSArray *queryItems = params.queryItems; 
    NSPredicate *predicate = [NSPredicate predicateWithFormat:@"name=%@", @"tree_width"]; 
    NSURLQueryItem *queryItem = [[queryItems filteredArrayUsingPredicate:predicate] 
           firstObject]; 
    int tree_width = [queryItem.value intValue]; 

    if(tree_width > 10){ 
     // rotate WebView 

     self.webView.frame = CGRectMake(0, 0, [UIScreen mainScreen].bounds.size.height, [UIScreen mainScreen].bounds.size.width); 
     self.webView.transform = CGAffineTransformMakeRotation(M_PI_2); 
    } 
}

您可以看到WebView未完全拉伸（高度方向）以適應屏幕（它應該掩蓋其背後的實現代碼如下）：