做了ionic项目也有一段时间了,把之前做的笔记分享出来,仅供大家参考,一起学习、一起进步,我感觉学一门语言,就是去找实际的案列直接应用它,在实践中学习,今天介绍的是通过ionic UI组件ImagePicker、Camera进行照片和照相功能
1)首先你要想用这个组件必须要添加它,通过命令行npm install –save @ionic-native/camera 安装camera;
通过命令行npm install –save @ionic-native/image-picker 安装image-picker,但是注意除了这个命令还要安装插件cordova plugin add https:/github.com/Telerik-Verified-Plugins/ImagePicker.git,这个命令需要git,所以要按照git,这里就不多说了。
2)安装完命令就可以撸代码了,通过ActionSheetController 弹出选择框 选择照片和相机,代码如下:1
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25let actionSheet = this.actionSheetCtrl.create({
title: '',
buttons: [
{
text: '拍照',
handler: () => {
this.getPhoto();
console.log('拍照 clicked');
}
}, {
text: '相册',
handler: () => {
this.getImage();
console.log('相册 clicked');
}
}, {
text: '取消',
role: 'cancel',
handler: () => {
console.log('取消 clicked');
}
}
]
});
actionSheet.present();
3)多文件选择:代码如下:1
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21let n = $('.uploadimg_list').children().length;
const optionss= { maximumImagesCount:4-n};
this.imagePicker.getPictures(optionss).then((results) => {
this.imageArr.splice(0, this.imageArr.length);
let results
for (let i = 0; i < results.length; i++) {
this.imageArr.push(results[i]);
let img_list = $('.uploadimg_list');
for (let i = 0; i < this.imageArr.length; i++) {
resultess = '<div class="img_wrap">![](' + this.imageArr[i] + ')<div class="close_btn"></div></div>';
}
img_list.append(resultess);
sessionStorage.setItem('imgtxt_imgs', JSON.stringify(this.imageArr));
}
}, (err) => {
alert( '未选择');
});
4)照相机:代码如下1
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18const options: CameraOptions = {
quality: 50,
destinationType: this.cameras.DestinationType.DATA_URL,
encodingType: this.cameras.EncodingType.JPEG,
mediaType: this.cameras.MediaType.PICTURE
}
this.cameras.getPicture(options).then((imageData) => {
//this.imageArr.splice(0, this.imageArr.length);
let resultess;
this.imageArr.push(imageData);
let img_list = $('.uploadimg_list');
resultess = '<div class="img_wrap">![](' + imageData + ')<div class="close_btn"></div></div>';
img_list.append(resultess);
sessionStorage.setItem('imgtxt_imgs', JSON.stringify(this.imageArr));
}, (err) => {
// Handle error
alert( '未选择');
});