Ios 旋转图像并保存在React Native中
我将在react–native中旋转图像,我希望获得旋转图像的base64。 我用了几个图书馆Ios 旋转图像并保存在React Native中,ios,react-native,image-rotation,rn-fetch-blob,Ios,React Native,Image Rotation,Rn Fetch Blob,我将在react–native中旋转图像,我希望获得旋转图像的base64。 我用了几个图书馆 react native image rotate:它在Android上运行良好,但在iOS上我将rct image store://1作为url,因此我尝试使用rn fetch blob获取base64,但它抛出了无法识别该url的错误 react-native-image-resizer:我使用了此选项,但在iOS中响应不好。如果我设置-90,那么旋转-180,如果我设置-180,那么它旋转为-2
react native image rotate
:它在Android上运行良好,但在iOS上我将rct image store://1
作为url,因此我尝试使用rn fetch blob
获取base64,但它抛出了无法识别该url的错误react-native-image-resizer
:我使用了此选项,但在iOS中响应不好。如果我设置-90,那么旋转-180,如果我设置-180,那么它旋转为-270我需要将图像旋转为-90,-180,-270,-360(原始)。这是我目前为止的工作代码
rotateImage = (angle) => {
const { currentImage } = this.state; // origin Image, you can pass it from params,... as you wish
ImageRotate.rotateImage( // using 'react-native-image-rotate'
currentImage.uri,
angle,
(rotatedUri) => {
if (Platform.OS === 'ios') {
ImageStore.getBase64ForTag( // import from react-native
rotatedUri,
(base64Image) => {
const imagePath = `${RNFS.DocumentDirectoryPath}/${new Date().getTime()}.jpg`;
RNFS.writeFile(imagePath, `${base64Image}`, 'base64') // using 'react-native-fs'
.then(() => {
// now your file path is imagePath (which is a real path)
if (success) {
this.updateCurrentImage(imagePath, currentImage.height, currentImage.width);
ImageStore.removeImageForTag(rotatedUri);
}
})
.catch(() => {});
},
() => {},
);
} else {
this.updateCurrentImage(rotatedUri, currentImage.height, currentImage.width);
}
},
(error) => {
console.error(error);
},
);
};
我想你已经做了rotatedUri
- 然后您可以通过
从ImageStore
获取base64李>react native
- 然后用
react native fs
之后你有了
imagePath
是本地图像。最后,我找到了答案
import ImageRotate from 'react-native-image-rotate';
import ImageResizer from 'react-native-image-resizer';
import RNFetchBlob from 'rn-fetch-blob';
ImageRotate.rotateImage(
this.state.image.uri,
rotateDegree,
uri => {
if (Platform.OS === 'android') {
console.log('rotate', uri);
RNFetchBlob.fs.readFile(uri, 'base64').then(data => {
const object = {};
object.base64 = data;
object.width = this.state.image.height;
object.height = this.state.image.width;
object.uri = uri;
this.setState({image: object, spinner: false});
});
} else {
console.log(uri);
const outputPath = `${RNFetchBlob.fs.dirs.DocumentDir}`;
ImageResizer.createResizedImage(
uri,
this.state.image.height,
this.state.image.width,
'JPEG',
100,
0,
outputPath,
).then(response => {
console.log(response.uri, response.size);
let imageUri = response.uri;
if (Platform.OS === 'ios') {
imageUri = imageUri.split('file://')[1];
}
RNFetchBlob.fs.readFile(imageUri, 'base64').then(resData => {
const object = {};
object.base64 = resData;
object.width = this.state.image.height;
object.height = this.state.image.width;
object.uri = response.uri;
this.setState({image: object, spinner: false});
});
});
}
},
error => {
console.error(error);
},
);
}
尝试使用Expo图像操纵器
你可以查看旋转后的图像你是什么意思?谢谢你的回答,我以前检查过imagestore,但它已经被弃用了,现在我不能使用它。我检查过了,你是对的。问题可以在这里找到是的,解决方案是什么?问题是公开的。所以现在可能没有解决方案。嗨tuledev,我可以用ImageResizer.createResizedImage获取rct图像存储url图像
const rotated = await ImageManipulator.manipulateAsync(
image.uri,
[{ rotate: -90 }],
{ base64: true }
);