Question

自更新到iOS 11.3以来，HTML输入字段无法再使用JavaScript .focus（）进行聚焦，除非函数调用紧跟触摸交互（以前可以使用.focus（））。有没有已知的解决方法？

Answer 1

在blur() .....

之前致电focus()

Answer 2

似乎已将某些更新推送到回购：

https://github.com/ionic-team/cordova-plugin-wkwebview-engine/pull/171#issuecomment-377824347

因此，请确保删除cordova ios平台，添加最新版本的wkwebview：cordova-plugin-ionic-webview 1.1.19，然后添加npm install并添加平台ios。我刚刚测试它就像一个魅力。

Answer 3

向元素添加点击功能以调用焦点功能工作正常。或者更好的解决方案？

AlarmManager

Answer 4

这是我们当前在应用程序开发框架中使用的代码，以使input.focus（）正常工作。确认可正常使用并被Apple在App Store中接受：

Class class = NSClassFromString(@"WKContentView");
NSOperatingSystemVersion iOS_11_3_0 = (NSOperatingSystemVersion){11, 3, 0};

if ([[NSProcessInfo processInfo] isOperatingSystemAtLeastVersion: iOS_11_3_0]) {
    SEL selector = sel_getUid("_startAssistingNode:userIsInteracting:blurPreviousNode:changingActivityState:userObject:");
    Method method = class_getInstanceMethod(class, selector);
    IMP original = method_getImplementation(method);
    IMP override = imp_implementationWithBlock(^void(id me, void* arg0, BOOL arg1, BOOL arg2, BOOL arg3, id arg4) {
        ((void (*)(id, SEL, void*, BOOL, BOOL, BOOL, id))original)(me, selector, arg0, TRUE, arg2, arg3, arg4);
    });
    method_setImplementation(method, override);
} else {
    SEL selector = sel_getUid("_startAssistingNode:userIsInteracting:blurPreviousNode:userObject:");
    Method method = class_getInstanceMethod(class, selector);
    IMP original = method_getImplementation(method);
    IMP override = imp_implementationWithBlock(^void(id me, void* arg0, BOOL arg1, BOOL arg2, id arg3) {
        ((void (*)(id, SEL, void*, BOOL, BOOL, id))original)(me, selector, arg0, TRUE, arg2, arg3);
    });
    method_setImplementation(method, override);
}

iOS 11.3 WKWebView：input.focus（）不做任何事情

4 个答案: