i used this
<PickerSelect
style={{
inputIOS: AppStyles.picker
}}
underline={undefined}
placeholder={{ label: 'Provincia...', value: null }}
items={this.state.provincias}
onValueChange={this.onSelectProvinciaChange}
/>
but the underline still there
solved, the underline must be in style attr with a opacity 0 as a hacky hide attr
<PickerSelect
style={{
inputIOS: AppStyles.picker,
underline: { opacity: 0 }
}}
placeholder={{ label: 'Provincia...', value: null }}
items={this.state.provincias}
onValueChange={this.onSelectProvinciaChange}
/>
use borderTopWidth: 0
Most helpful comment
solved, the underline must be in style attr with a opacity 0 as a hacky hide attr