Add null-check (xamarin#12089)

jfversluis · web-flow · commit 54a167945f5b · 2020-09-14T10:41:51.000-07:00
fixes xamarin#11965
diff --git a/Xamarin.Forms.Platform.iOS/Renderers/EntryRenderer.cs b/Xamarin.Forms.Platform.iOS/Renderers/EntryRenderer.cs
@@ -390,7 +390,7 @@ void UpdateMaxLength()
 
 		bool ShouldChangeCharacters(UITextField textField, NSRange range, string replacementString)
 		{
-			var newLength = textField?.Text?.Length + replacementString.Length - range.Length;
+			var newLength = textField?.Text?.Length + replacementString?.Length - range.Length;
 			return newLength <= Element?.MaxLength;
 		}
 

Original file line number	Diff line number	Diff line change
`@@ -390,7 +390,7 @@ void UpdateMaxLength()`
`390`	`390`
`391`	`391`	`bool ShouldChangeCharacters(UITextField textField, NSRange range, string replacementString)`
`392`	`392`	`{`
`393`		`- var newLength = textField?.Text?.Length + replacementString.Length - range.Length;`
	`393`	`+ var newLength = textField?.Text?.Length + replacementString?.Length - range.Length;`
`394`	`394`	`return newLength <= Element?.MaxLength;`
`395`	`395`	`}`
`396`	`396`