这是错误屏幕: The ERROR SCREEN
渲染代码中的按钮:
<View style={{flex:1}}>
<Image source={require('../images/plots2.jpg')}
style={{flex:1,height:null,width:"100%",resizeMode:'contain'}}
/>
<Button onPress = {this.abc(this.state.items)}
title="Retrive Database Table"
/>
</View>
按钮中的功能在此处称为代码:
abc (items) {
console.log("IN hashir");
//console.log("Hashir RAN count: "+this.state.countrunHashir);
//var a=this.state.countrunHashir+1;
//this.setState(countrunHashir:1);
//this.state.countrunHashir+=1;
return(
items.map(item=>{
return(
<Card style={{marginLeft: 5, marginRight:5}}>
<CardItem header style={{borderBottomWidth:1,borderBottomColor:'#dee0e2'}}>
<Text style={{backgroundColor:'white',color:'red',fontSize:25,fontWeight:'bold',textAlign:'center',justifyContent:'center'}}>
Items Recommended For You
</Text>
</CardItem>
<RecommendedCardItem
title={item.Title}
model="has"
StartingBid="hashir"
imageUri={require("../images/h1.jpg")}
rating={3}
/>
<TouchableOpacity style={{alignContent:'center', backgroundColor:'#b2ff59',width:'100%',borderRadius:25,marginVertical:10,paddingVertical:12 }}>
<Text style={{fontSize:22, fontWeight:'bold', color:'#ffffff',textAlign:'center',color:'black'}}>Click For More Details</Text>
</TouchableOpacity>
</Card>
);
})
);
}
在构造函数代码中初始化的状态:
this.state={
items:[],
mainscreenrender:0,
countrunHashir:0
};
渲染问题是当按钮希望使用数组“ items”渲染整个视图列表时。您能为我改善代码吗? 非常感谢您。
谢谢!
答案 0 :(得分:0)
尝试为您的onPress属性(而不是“ value”)提供回调函数。您的代码应如下所示:
<Button onPress = {() => this.abc(this.state.items)}
title="Retrive Database Table" />