我正在使用react native来创建测试应用程序,在进行样式设置时对按钮没有影响.谁能告诉我我在做什么错.
例如,我试图将红色置于按钮上,但它不起作用.
我该怎么做才能正确？

import React, { Component } from 'react'
import {
  AppRegistry,
  StyleSheet,
  Text,
  Button,
  ScrollView,
  Dimensions,
  PanResponder,
  Animated,
  View
} from 'react-native'

import { StackNavigator } from 'react-navigation'





class Home extends Component{

  static navigationOptions = {

   title:'Home'



  };

componentWillMount(){

  this.animatedValue = new Animated.ValueXY();
  this._value = {x:0 , y:0}
  this.animatedValue.addListener((value) => this._value = value);


this.panResponder = PanResponder.create({

 onStartShouldSetPanResponder: (evt, gestureState) => true,
  onMoveShouldSetPanResponder: (evt, gestureState) => true,
  onPanResponderGrant: (e, gestureState) => {

this.animatedValue.setOffset({

x:this._value.x,
y:this._value.y,


})

this.animatedValue.setValue({x:0 , y:0})

      },

  onPanResponderMove:Animated.event([


null,{dx: this.animatedValue.x , dy:this.animatedValue.y}

    ]),  
  onPanResponderRelease: (e, gestureState) => { 

      },       
})
}

  render(){

    var animatedStyle = {

      transform:this.animatedValue.getTranslateTransform()
    }

    return(

        <View style={styles.container}>


         <Button 
         style={styles.button}
         title="Login"
          onPress={() => this.props.navigation.navigate("Login")} />



        </View>
      )
  }
}

class Login extends Component{
   static navigationOptions = {  
   title:'Login'
  };
  render(){  
    return( 
        <View>
        <Text>home</Text>

        </View>
      )
  }
}

const App = StackNavigator({

Home:{ screen: Home},
Login:{ screen:Login}


});

var styles = StyleSheet.create({
  container: {



  },

  button:{


    color:'red'



  }
});


export default App

解决方法:

您不能使用样式表将颜色应用于按钮.

签出链接here

它必须内联.它是按钮的属性,它与样式属性不同,不像样式属性适用于诸如视图和文本之类的标签.

如果为视图容器提供某种样式,它将可以使用,但是不能使用button,因为它不支持这种方式.

解决方案：

    <View style={styles.container}>
      <Button 
       title="Login"
       color="red"
       onPress={() => this.props.navigation.navigate("Login")} />
    </View>

希望有帮助！