In WKWebView we can call ObjectiveC/swift code using webkit message handlers
eg: webkit.messageHandlers.<handler>.pushMessage(message)
It works well for simple javascript functions without parameters. But;
Unfortunately I couldn't find a native solution.
But the following workaround solved my problem
Use javascript promises & you can call the resolve function from your iOS code.
UPDATE
This is how you can use promise
In JS
this.id = 1;
this.handlers = {};
window.onMessageReceive = (handle, error, data) => {
if (error){
this.handlers[handle].resolve(data);
}else{
this.handlers[handle].reject(data);
}
delete this.handlers[handle];
};
}
sendMessage(data) {
return new Promise((resolve, reject) => {
const handle = 'm'+ this.id++;
this.handlers[handle] = { resolve, reject};
window.webkit.messageHandlers.<yourHandler>.postMessage({data: data, id: handle});
});
}
in iOS
Call the window.onMessageReceive function with appropriate handler id
