xamarin.ios

问题 Developping an MvvmCross application targeting Android and iOS (Xamarin/Mono) and Windows Store (because it's so easy/fast to debug compared to iOS/Android). The Core of the app is PCL based. Is it possible to use Async/Await in the Core library? Xamarin mono supports Async/Await, and Windows Store supports it. However, when selecting only Net4.5, Windows Store, Mono Android and MonoTouch as the PCL targets, SL4 and WP7.5 get automatically selected and Async/Await is not availlable anymore.

问题 I have Json returning as the following: [{"CreatedBy":"GIS_DB","CreatedDate":"3/8/2012 10:44:00 AM","Id":39,"ModifiedBy":"","ModifiedDate":"","Name":"CF-39","StatusId":1,"TrailCoordinates":[{"CreatedBy":"GIS_DB","CreatedDate":"3/8/2012 10:44:00 AM","Id":1637,"Latitude":32.76004207,"Longitude":-97.34006853,"ModifiedBy":"","ModifiedDate":"","SortOrder":1,"TrailId":39},{"CreatedBy":"GIS_DB","CreatedDate":"3/8/2012 10:44:00 AM","Id":1638,"Latitude":32.76004333,"Longitude":-97.34012121,"ModifiedBy

问题 I have used below code to save the file in xamarin forms ios but give me System.IO.IOException: Sharing violation please help me. FileStream fileStream = File.Open(pdfPath, FileMode.Create); stream.Position = 0; stream.CopyTo(fileStream); fileStream.Flush(); fileStream.Close(); 回答1: Have you checked that your app has permission for accessing files on the system? Also i would to a check to see if the files exist before opening it with File.Exists(); . Also there are better ways of reading and

问题 My other question seems to be too generic, so I tought I'd create a new one on the details. Sorry if that is considered bad practice. I am trying to serialize C# objects to JSON strings with MonoTouch and the System.Json namespace in a way that doesn't require me to descend through the object(s) myself. Is that possible? If yes, how to do it properly? De-serialization works well by implicitly casting a JsonValue to a string, int, whatever. Also, descending in the hierarchy is no problem. Like

问题 My other question seems to be too generic, so I tought I'd create a new one on the details. Sorry if that is considered bad practice. I am trying to serialize C# objects to JSON strings with MonoTouch and the System.Json namespace in a way that doesn't require me to descend through the object(s) myself. Is that possible? If yes, how to do it properly? De-serialization works well by implicitly casting a JsonValue to a string, int, whatever. Also, descending in the hierarchy is no problem. Like

问题 My other question seems to be too generic, so I tought I'd create a new one on the details. Sorry if that is considered bad practice. I am trying to serialize C# objects to JSON strings with MonoTouch and the System.Json namespace in a way that doesn't require me to descend through the object(s) myself. Is that possible? If yes, how to do it properly? De-serialization works well by implicitly casting a JsonValue to a string, int, whatever. Also, descending in the hierarchy is no problem. Like

问题 My other question seems to be too generic, so I tought I'd create a new one on the details. Sorry if that is considered bad practice. I am trying to serialize C# objects to JSON strings with MonoTouch and the System.Json namespace in a way that doesn't require me to descend through the object(s) myself. Is that possible? If yes, how to do it properly? De-serialization works well by implicitly casting a JsonValue to a string, int, whatever. Also, descending in the hierarchy is no problem. Like

问题 In the Xamarin iOS Storyboard designer, the ViewDidLoad code of the ViewController gets built and run automatically when just looking at the storyboard. This is great for programmatic design elements because I can see them in designer view without having to start the simulator, but I also need to make an API call from ViewDidLoad and that crashes the designer with the error "Custom components are not being rendered because problems were detected" . public async override void ViewDidLoad() {

问题 In the Xamarin iOS Storyboard designer, the ViewDidLoad code of the ViewController gets built and run automatically when just looking at the storyboard. This is great for programmatic design elements because I can see them in designer view without having to start the simulator, but I also need to make an API call from ViewDidLoad and that crashes the designer with the error "Custom components are not being rendered because problems were detected" . public async override void ViewDidLoad() {

问题 I am working on custom function of Sqlite on Xamarin.iOS. I got answer from here : Show markers on map within a given radius (Xamarin.Android) but I am running into issue of Attempting to JIT compile method '(wrapper native-to-managed) Mono.Data.Sqlite.SqliteFunction:ScalarCallback (intptr,int,intptr)' while running with --aot-only. After searching on stack I found that here is a solution: custom functions SQLite with Mono but solution mention there is tough for me to understand. I am not