專案中載入webView，導航欄由web端做的話，客戶端就需要隱藏掉導航欄。這個時候顯示出來的頁面，在頂部會出現狀態列為空白的問題。底部也會多出空白，即：

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    self.view.backgroundColor = [UIColor whiteColor];
    UIWebView * view = [[UIWebView alloc] initWithFrame:self
 
.view.frame];
    view.backgroundColor = [UIColor redColor];
    [self.view addSubview:view];
}

效果如圖：


只需要將程式碼做如下修改，就可以解決以上問題，實現全屏：

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    self.view.backgroundColor = [UIColor
 
 whiteColor];
    UIWebView * view = [[UIWebView alloc] initWithFrame:self.view.frame];
    view.backgroundColor = [UIColor redColor];
    if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 11) {
        view.scrollView.contentInsetAdjustmentBehavior = UIScrollViewContentInsetAdjustmentNever;
    }else
 
{
        self.edgesForExtendedLayout = UIRectEdgeNone;
    }
    [self.view addSubview:view];
}

親試有效的哦~注意要判斷一下系統的版本，scrollView.contentInsetAdjustmentBehavior這個屬性時iOS11後新增的，如果版本號沒到11，可能會崩潰。