CODEWITHSUNDEEP
xamarinxamarin.ios
ish1104
ish1104

Reputation: 421

iOS HttpClient crash

This is my code

         HttpClient client = new HttpClient();
         client.DefaultRequestHeaders.Accept.Add(new 
         MediaTypeWithQualityHeaderValue("application/json"));
         var jsonstring = await client.GetStringAsync("https://asdasdadasd" + 
              url);

Occur this error:

2019-03-29 11:18:43.901 Eliant.App.iOS[3859:3548233] [AppCenterCrashes] ERROR: +[MSWrapperLogger MSWrapperLog:tag:level:]/7 Unhandled Exception: UIKit.UIKitThreadAccessException: UIKit Consistency error: you are calling a UIKit method that can only be invoked from the UI thread. at UIKit.UIApplication.EnsureUIThread () [0x00020] in

Library/Frameworks/Xamarin.iOS.framework/Versions/12.6.0.16/src/Xamarin.iOS/UIK

it/UIApplication.cs:89 at UIKit.UIGestureRecognizer.RemoveTarget (Foundation.NSObject target, System.IntPtr action) [0x00000] in /Library/Frameworks/Xamarin.iOS.framework/Versions/12.6.0.16/src/Xamarin.iOS/UIKit/UIGestureRecognizer.g.cs:342 at UIKit.UIGestureRecognizer.OnDispose () [0x00016] in /Library/Frameworks/Xamarin.iOS.framework/Versions/12.6.0.16/src/Xamarin.iOS/UIKit/UIGestureRecognizer.cs:41 at UIKit.UIGestureRecognizer.Dispose (System.Boolean disposing) [0x00000] in /Library/Frameworks/Xamarin.iOS.framework/Versions/12.6.0.16/src/Xamarin.iOS/UIKit/UIGestureRecognizer.g.cs:959 at Foundation.NSObject.Finalize () [0x00000] in /Library/Frameworks/Xamarin.iOS.framework/Versions/12.6.0.16/src/Xamarin.iOS/Foundation/NSObject2.cs:143

Any ideas?

Commenting out await client.GetStringAsync() makes the app work fine. I've tried running it using Device invoke on the main thread (even though I don't think there is any reason I should need to do that?) I've tried .result instead of await, and I've tried getasync().content.readstringasync and always have the same issue.

Upvotes: 0

Views: 365

Answers (1)

James Lavery
James Lavery

Reputation: 949

Looks like you need to make this call on the UI thread (from the error contents).

Have you tried ensuring that this code is running on the UI thread? See this link for details on how you should be able to do this.

Essentially you should be doing something like:

InvokeOnMainThread ( () => {
    // code which needs to be run on UI thread
});

Upvotes: 1

Related Questions