为什么 javascript 'window.location.hash' 在iOS11的wkwebview上不工作?

Question

但是可以在iOS10和以前的额系统上工作，就是在iOS11上不工作？求请教

- (void)jumpToHash:(WKWebView *)wkWebView {
NSString * jsJumpToHash =[NSString stringWithFormat:@"function jumpToHash(){window.location.hash ='#%@hash';};",self.hashLocation];

[wkWebView evaluateJavaScript:jsJumpToHash completionHandler:^(id Result, NSError * error) {}];

NSString *jsFun = @"jumpToHash()";

[wkWebView evaluateJavaScript:jsFun completionHandler:^(id Result, NSError * error) {}];

self.hashLocation = @"";
}