Want to limit the size of a text field in flutter? I had to add an additional snippet to what RSproute mentioned. The full code is here:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 | TextEditingController _controller = new TextEditingController(); String text = ""; // empty string to carry what was there before it onChanged int maxLength = ... ... new TextField( controller: _controller, onChange: (String newVal) { if(newVal.length <= maxLength){ text = newVal; }else{ _controller.value = new TextEditingValue( text: text, selection: new TextSelection( baseOffset: maxLength, extentOffset: maxLength, affinity: TextAffinity.downstream, isDirectional: false ), composing: new TextRange( start: 0, end: maxLength ) ); _controller.text = text; } } ); |
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