ext numberfield小数模式

{
    xtype: 'textfield',
    name: 'latitude',
    fieldLabel: '纬度',
    xtype: 'numberfield',
    editable: true,
    allowBlank:false,
    decimalPrecision: 3, // 精确地小数点后
    allowDecimals: true,
    step:0.01,
    maxValue: 53.33,
    minValue: 3.52,
    value: 3.52
}