[英]UIWebview/WKWebView javascript call handle two return values?
I have one javascript function which return multiple values. 我有一个JavaScript函数,可以返回多个值。 I am trying to call that function in my iOS app using Webview.
我正在尝试使用Webview在我的iOS应用中调用该函数。 I have tried searching for similar question but found nothing.
我曾尝试搜索类似的问题,但一无所获。 Check the code below.
检查下面的代码。 FYI single return value works fine and I am calling this javascript after "webview did finish" delegate called.
仅供参考,单返回值可以正常工作,我在调用“ webview完成”委托后调用此javascript。
//Javascript function
function listABCs() constant returns (uint noOfABCs, address[] retABCAddresses) {
return (abcAddresses.length, abcAddresses);
}
//iOS code
let script = "getAbcList()"
wkWebView?.evaluateJavaScript(script, completionHandler: { (response: Any?, error:Error?) in
print("\n Error \(String(describing: error))")
let res = response as? String
print("Response = \(String(describing: response))")
})
Thanks in advance. 提前致谢。
You can add a boolean once you received your value the first time set that to true 您可以在第一次将值设置为true时添加布尔值
//Create a variable received response
var receivedResponse = false
let script = "getKycList()"
wkWebView?.evaluateJavaScript(script, completionHandler: { (response: Any?, error:Error?) in
print("\n Error \(String(describing: error))")
if !receivedResponse {
if let res = response as? String {
// use the response now
print("Response = \(res)")
// set the receivedResponse to true
receivedResponse = true
}
}
})
I solved this by returning a dictionary instead of a string and then using the dictionary in iOS to retrieve the values. 我通过返回字典而不是字符串来解决此问题,然后在iOS中使用字典来检索值。
Javascript code: JavaScript代码:
function customDictFrom(val1, val2) {
var data_to_pass = {
'val1': val1,
'val2': val2
};
return data_to_pass;
}
function listABCs() constant returns (uint noOfABCs, address[] retABCAddresses) {
var data_to_pass = customDictFrom(abcAddresses.length, abcAddresses);
return data_to_pass;
}
Swift (Native) Handling: Swift(本机)处理:
let script = "getAbcList()"
wkWebView?.evaluateJavaScript(script, completionHandler: { (response: Any?, error:Error?) in
print("\n Error \(String(describing: error))")
let res = response as? [String: Any] //Your response is here as a dictionary
print("Response = \(String(describing: response))")
})
Hope this helps. 希望这可以帮助。
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