Passing geolocation fetched from the app to the UIWebView

问题

I'm developing the iOS app and in one of the views I would like to include UIWebView with a page that contains a map (the address is: https://carsharing.mvg-mobil.de). The website requires location permission so as soon as the user is presented with this view, an alert appears: "https://carsharing.mvg-mobil.de/ would like to use your current location. OK/Don't allow".

In my app I have the location of the user fetched from the CoreLocation framework. Is there a way to pass this location to this webview to avoid this alert view? Would it be somehow possible by injecting some JavaScript code or maybe somehow including geolocation in the URL?

回答1:

OK, I found the solution in the source code of PhoneGap how to inject JavaScript code to a standrad webview with the location fetched from CoreLocation:

int epoch = [newLocation.timestamp timeIntervalSince1970];
float course = -1.0f;
float speed  = -1.0f;
NSString* coords =  [NSString stringWithFormat:@"coords: { latitude: %f, longitude: %f, altitude: %f, heading: %f, speed: %f, accuracy: %f, altitudeAccuracy: %f }",
                        newLocation.coordinate.latitude,
                        newLocation.coordinate.longitude,
                        newLocation.altitude,
                        course,
                        speed,
                        newLocation.horizontalAccuracy,
                        newLocation.verticalAccuracy
                     ];

NSString * jsCallBack = [NSString stringWithFormat:@"navigator.geolocation.setLocation({ timestamp: %d, %@ });", epoch, coords];

[webView stringByEvaluatingJavaScriptFromString:jsCallBack];

Hopefully somebody else can profit from this code as well.

回答2:

You can call JavaScript on the page with UIWebView's

 stringByEvaluatingJavaScriptFromString:(NSString *)script

来源：https://stackoverflow.com/questions/25041134/passing-geolocation-fetched-from-the-app-to-the-uiwebview

标签

ios

objective-c

uiwebview

geolocation