在尚未显示的 UIViewController 上预加载 UIWebView [英] PreLoad UIWebView on a not yet displayed UIViewController

问题描述

我有一个应用程序，在最后一个 UIViewController 上有一个 UIWebView... 用户浏览应用程序，最后他们可以转换(模态)到带有 UIWebView 的最终 UIViewController... 在它的 viewDidLoad我让 UIWebView 加载页面.

I have an app where on the very last UIViewController there is a UIWebView... the user navigates through the app and at the very end they can transition (modal) to the final UIViewController with a UIWebView... in it's viewDidLoad I have the UIWebView load the page.

问题是加载这个页面需要大约 8 秒，这让用户很恼火.

The problem is it takes about 8 seconds to load this page and that annoys users.

如果 UIViewController 尚未呈现，我该如何提前加载 UIWebView(例如应用程序首次启动时！)?

How can I load the UIWebView way ahead of time (like when the app is first launched!) if that UIViewController hasn't even been presented yet?

推荐答案

我在 UIPageViewController 中遇到了与 UIWebView 相同的问题，我找到了更好的解决方案.

I had your same problem for UIWebView inside a UIPageViewController and I found a better solution.

如果你在 FirstViewController 并且你的 webView 在你的 SecondViewController 把 loadHTMLString 或 loadRequest 方法在您的 SecondViewController 的 viewDidLoad 中，并调用 [secondViewController.view layoutSubviews] 开始在您的 FirstViewController 中加载.

If you are in FirstViewController and you have your webView in your SecondViewController put the loadHTMLString or loadRequest method in the viewDidLoad of your SecondViewController and call [secondViewController.view layoutSubviews] for start loading in your FirstViewController.

例如:

FirstViewController

-(void)viewDidLoad{
    [super viewDidLoad];
    // _secondViewController -> An instance of SecondVieController
    [_secondViewController.view layoutSubviews];
}

SecondViewController

-(void)viewDidLoad{
    [super viewDidLoad];
    NSURL *url =[NSURL URLWithString:@"http://www.google.it"];
    NSURLRequest *request =[NSURLRequest requestWithURL:url];
    [self.webView loadRequest:request];
}

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