javascript

I'm trying to fit images in their containing views so that I can have a seamless grid of images. The problem is that resizeMode='contain' seems to fit to the width of the screen or at least some higher level container, I need the images to fit to the size of each list item.

Here's a very ugly example of the styles and resulting grid:

The styles:

const styles = StyleSheet.create({
  container: {
    flex: 1,
    backgroundColor: 'blue'
  },

  item: {
    flex: 1,
    overflow: 'hidden',
    alignItems: 'center',
    backgroundColor: 'orange',
    position: 'relative',
    margin: 10
  },

  image: {
    flex: 1
  }
})

The layout:

<TouchableOpacity 
  activeOpacity={ 0.75 }
  style={ styles.item }
>
  <Image
    style={ styles.image }
    resizeMode='contain'
    source={ temp }
  /> 
</TouchableOpacity>

The result (with resizeMode='contain' ):

The result (with resizeMode='cover' ):

As you can see, the cover ed images are very big and are as wide as the whole screen and don't fit the immediately containing view.

Update 1:

I was able to achieve a result close to what I'm looking for by applying a scale transform to the image and shrinking it from the center:

The transform:

transform: [{ scale: 0.55 }]

The resulting layout (without margins or paddings):

---

I could not get the example working using the resizeMode properties of Image , but because the images will all be square there is a way to do it using the Dimensions of the window along with flexbox.

Set flexDirection: 'row' , and flexWrap: 'wrap' , then they will all line up as long as they are all the same dimensions.

I set it up here

https://snack.expo.io/HkbZNqjeZ

"use strict";

var React = require("react-native");
var {
  AppRegistry,
  StyleSheet,
  Text,
  View,
  Image,
  TouchableOpacity,
  Dimensions,
  ScrollView
} = React;

var deviceWidth = Dimensions.get("window").width;
var temp = "http://thumbs.dreamstime.com/z/close-up-angry-chihuahua-growling-2-years-old-15126199.jpg";
var SampleApp = React.createClass({
  render: function() {
    var images = [];

    for (var i = 0; i < 10; i++) {
      images.push(
        <TouchableOpacity key={i} activeOpacity={0.75} style={styles.item}>
          <Image style={styles.image} source={{ uri: temp }} />
        </TouchableOpacity>
      );
    }

    return (
      <ScrollView style={{ flex: 1 }}>
        <View style={styles.container}>
          {images}
        </View>
      </ScrollView>
    );
  }
});

---

I think it's because you didn't specify the width and height for the item .

If you only want to have 2 images in a row, you can try something like this instead of using flex:

item: {
width: '50%',
height: '100%',
overflow: 'hidden',
alignItems: 'center',
backgroundColor: 'orange',
position: 'relative',
margin: 10,
},

This works for me, hope it helps.

---

Set the dimensions to the View and make sure your Image is styled with height and width set to 'undefined' like the example below :

    <View style={{width: 10, height:10 }} >
      <Image style= {{flex:1 , width: undefined, height: undefined}}    
       source={require('../yourfolder/yourimage'}
        />
    </View>

This will make sure your image scales and fits perfectly into your view.

链接地址: http://www.djcxy.com/p/89200.html

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