<TextInput style={{overflow: 'hidden', height: Resolution.scaleHeight(170),textAlignVertical: 'top'}}
placeholder="笔记内容"
editable={true}//是否可编辑
multiline={true}//多行输入
value={this.state.noteContent}
maxLength={200}
onChangeText={(text) => this.setState({noteContent: text})}
/>
textAlignVertical: 'top'是安卓置顶。必须加
