从UIWebView切换到WKWebView时发生错误

Question

I am developing an iOS application with Objective-C , I wanted to move from UIWebView to WKWebView .

However, an error occurred in the part which I wrote in this way before.

    WKWebView * webview = [[WKWebView alloc] initWithFrame: CGRectZero];
    ...
    if (! webview.request) {
        ...
    }

The errors are as follows.

Property 'request' not found on object of type 'WKWebView *'

If you can understand, please tell me how to fix it.

Thank you.

Answer 1

Error message is clear WKWebView don't have request property you should use load(_ request: URLRequest) -> WKNavigation? method and check for url property instead

as is defined in WKWebView class

/*! @abstract The active URL.
 @discussion This is the URL that should be reflected in the user
 interface.
 @link WKWebView @/link is key-value observing (KVO) compliant for this
 property.
 */
open var url: URL? { get }

your code should be

WKWebView * webview = [[WKWebView alloc] initWithFrame: CGRectZero];
...
if (!webview.url) {
    ...
}