Reactnative React本机IOS，当TextInput获得焦点时，按钮按下不注册

在react native中，我有一个TextInput元素，当你点击它时，键盘会根据需要弹出.然而，问题是，我有一个箭头按钮，当您将输入输入文本输入时，您可以单击该按钮，但第一次touch 该按钮或任何其他地方时，总是只会删除键盘，而不会在箭头按钮上运行onPress功能.我怎样才能在输入文本后仍能打开键盘.下一次按下既会删除键盘，也会对按钮执行onPress功能.现在用户必须双击.一次移除键盘，然后第二次执行onPress功能.

<View style={{flex: 1,backgroundColor: "#b70f42", justifyContent: "center", alignItems: "center"}}>
  <View style={{position: "relative"}}>
    <TextInput
      style={{color: "#FFF", borderBottomColor: "#FFF", borderBottomWidth: 1,fontSize:30,padding: 0, paddingRight: 50,height: 40,width: this.state.width*3/4,shadowOffset: { width: 0, height: 0 }, shadowColor: 'black', shadowOpacity: 0.5, shadowRadius: 5}}
      onChangeText={(passwordInput) => this.showArrow(passwordInput)}
      value={this.state.passwordInput}
      placeholder="Vart ska du?"
      placeholderTextColor="#FFF"
    />
    <Text style={{marginLeft: 175,color:"#FFF"}}>Powered by IBM</Text>
    <TouchableHighlight underlayColor="rgba(255,255,255,0)" style={{position: "absolute", top: 0, right: 5,}} onPress={() => this.onSearchButtonClick()}>
      <Animated.Image
        source={require("../../img/right-arrow.png")}
        style={{width:40, height: 40,opacity: this.state.arrowOpacity}}>
      </Animated.Image>
    </TouchableHighlight>
  </View>
</View>