无法使用 npm react-native-view-shot 在缓存中找到图像
Not able to find Image in cache using npm react-native-view-shot
我正在使用 npm react-native-view-shot 捕捉图像中的视图并保存在本地设备上。
当我尝试使用以下代码拍摄 snap-shot
时,我得到 path
但不是该位置的图像,下面是代码和输出
路径:- file:///data/user/0/com.caryn/cache/ReactNative-snapshot-image5936120548912611616.jpg
captureRef(this.ref, this.state.value)
.then(res =>
this.state.value.result !== "file"
? res
: new Promise((success, failure) =>
// just a test to ensure res can be used in Image.getSize
Image.getSize(
res,
(width, height) => (console.log(res, width, height), success(res)),
failure)))
.then(res => {
this.setState({
error: null,
res,
previewSource: {uri: res}
})
console.log(res)
})
.catch(error => (console.warn(error), this.setState({error, res: null, previewSource: null})));
根据 react-native-view-shot 文档。
导入import {captureRef} from "react-native-view-shot";
我已经解决了以下问题。
- 将
snap
保存到语言环境存储和
捕捉快照时视图中的图像变得模糊
you can also refer
Write state in the constructor
as following you can add height
& width
to value
in state
constructor(props) {
super(props)
this.ref = React.createRef();
this.state = {
previewSource: null,
error: null,
res: null,
value: {
format: "jpg",
quality: 0.9,
}
}
使用 collapsable={false} ref={(ref) => this.ref = ref}
创建视图引用
按下按钮
<Button title={'press me'} onPress={() => this.snapshot()}/>
调用以下方法
snapshot() {
captureRef(this.ref, this.state.value)
.then(res =>
this.state.value.result !== "file"
? res
: new Promise((success, failure) =>
// just a test to ensure res can be used in Image.getSize
Image.getSize(
res,
(width, height) => (console.log(res, width, height), success(res)),
failure)))
.then(res => {
this.setState({
error: null,
res,
previewSource: {uri: res}
})
CameraRoll.saveToCameraRoll(res)
.then(Alert.alert('Success', 'Photo added to camera roll!'))
.catch(err => console.log('err:', err))
}).catch(error => (console.warn(error), this.setState({error, res: null, previewSource: null})));
}
Save Image to locale storage using the following code
安装npm @react-native-community/cameraroll
导入import CameraRoll from "@react-native-community/cameraroll";
CameraRoll.saveToCameraRoll(uri)
.then((resp) => Alert.alert(resp))
.catch(err => console.log('err:', err))
我正在使用 npm react-native-view-shot 捕捉图像中的视图并保存在本地设备上。
当我尝试使用以下代码拍摄 snap-shot
时,我得到 path
但不是该位置的图像,下面是代码和输出
路径:- file:///data/user/0/com.caryn/cache/ReactNative-snapshot-image5936120548912611616.jpg
captureRef(this.ref, this.state.value)
.then(res =>
this.state.value.result !== "file"
? res
: new Promise((success, failure) =>
// just a test to ensure res can be used in Image.getSize
Image.getSize(
res,
(width, height) => (console.log(res, width, height), success(res)),
failure)))
.then(res => {
this.setState({
error: null,
res,
previewSource: {uri: res}
})
console.log(res)
})
.catch(error => (console.warn(error), this.setState({error, res: null, previewSource: null})));
根据 react-native-view-shot 文档。
导入import {captureRef} from "react-native-view-shot";
我已经解决了以下问题。
- 将
snap
保存到语言环境存储和 捕捉快照时视图中的图像变得模糊
you can also refer
Write state in the
constructor
as following you can addheight
&width
tovalue
in state
constructor(props) {
super(props)
this.ref = React.createRef();
this.state = {
previewSource: null,
error: null,
res: null,
value: {
format: "jpg",
quality: 0.9,
}
}
使用 collapsable={false} ref={(ref) => this.ref = ref}
按下按钮
<Button title={'press me'} onPress={() => this.snapshot()}/>
调用以下方法
snapshot() {
captureRef(this.ref, this.state.value)
.then(res =>
this.state.value.result !== "file"
? res
: new Promise((success, failure) =>
// just a test to ensure res can be used in Image.getSize
Image.getSize(
res,
(width, height) => (console.log(res, width, height), success(res)),
failure)))
.then(res => {
this.setState({
error: null,
res,
previewSource: {uri: res}
})
CameraRoll.saveToCameraRoll(res)
.then(Alert.alert('Success', 'Photo added to camera roll!'))
.catch(err => console.log('err:', err))
}).catch(error => (console.warn(error), this.setState({error, res: null, previewSource: null})));
}
Save Image to locale storage using the following code
安装
npm @react-native-community/cameraroll
导入
import CameraRoll from "@react-native-community/cameraroll";
CameraRoll.saveToCameraRoll(uri) .then((resp) => Alert.alert(resp)) .catch(err => console.log('err:', err))