![]() The invention provides a QWERTY mobile telephone keyboard which is arranged in a staggered way. G06F3/0202- Constructional details or processes of manufacture of the input device.G06F3/02- Input arrangements using manually operated switches, e.g.G06F3/01- Input arrangements or combined input and output arrangements for interaction between user and computer.G06F3/00- Input arrangements for transferring data to be processed into a form capable of being handled by the computer Output arrangements for transferring data from processing unit to output unit, e.g.G06- COMPUTING CALCULATING OR COUNTING.Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.) Filing date Publication date Application filed by 杜保毅 filed Critical 杜保毅 Priority to CNA2008100410532A priority Critical patent/CN101324807A/en Publication of CN101324807A publication Critical patent/CN101324807A/en Priority to PCT/CN2008/002111 priority patent/WO2010009585A1/en Status Pending legal-status Critical Current Links Inventor 杜保毅 杜巍 Original Assignee 杜保毅 Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Pending Application number CNA2008100410532A Other languages Chinese ( zh) Google Patents CN101324807A - Staggered QWERTY mobile phone keyboard Public MinusButtonEntryEffect () : base ("Xamarin.CN101324807A - Staggered QWERTY mobile phone keyboard This code goes in the PCL and allows us to access the effect from XAML: public class MinusButtonEntryEffect : RoutingEffect Var idx = (int)Control.GetOffsetFromPosition(Control.BeginningOfDocument, position) Įlement.Text = (idx, "-") Public class MinusButtonEntryEffect : PlatformEffect This class goes in the iOS project and is the main effect: using MyApp There's a better way to do this using Effects in Xamarin Forms. You will of course want to customize the toolbar and toolbar button to suit your needs. This code basically creates a button, adds that to a toolbar, and then assigns that toolbar to the underlying UITextField. Var idx = (int) Control.GetOffsetFromPosition(Control.BeginningOfDocument, position) ![]() UIBarButtonItem button = new UIBarButtonItem("-", UIBarButtonItemStyle.Plain, (sender, args) => Protected override void OnElementChanged(ElementChangedEventArgs e) Here's what your custom renderer for iOS might look like: class MinusButtonEntryRenderer : EntryRenderer You're going to want to create a custom renderer for the Entry control which has the default behavior for UWP and Android, while adding a custom InputAccessoryView to your iOS UITextField. This is the old answer, see below for an updated version In Android keypad have negative sign but IOS don't have. My issue is when i define the Keyboard telephone in entry field it allow to input negative value in android app but in IOS it not allowed. I have made an application in Xamarin From.
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