CardNumberInputFormatter class

TextEditingValue 相关说明：

• int baseOffset：开始的位置
• int extentOffset：结束的位置
• TextAffinity affinity：光标的位置
• bool isDirectional：是否消除了其基础和范围的歧义（不懂可以直接忽略） 银行卡号输入格式化器 格式：每4位添加一个空格，如 1234 1234 1234 1234 123

Inheritance

• Object
• TextInputFormatter
• CardNumberInputFormatter

Constructors

CardNumberInputFormatter()

Properties

hashCode → int

The hash code for this object.

no setter, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

formatEditUpdate(TextEditingValue oldValue, TextEditingValue newValue) → TextEditingValue

Called when text is being typed or cut/copy/pasted in the EditableText.

override

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited