保存图片需要的功能

yvan.ni
1 parent 57141c19
Showing 1 changed file with 103 additions and 1 deletions
pages/team/team_success/team_success.js
@@ -866,6 +866,108 @@ Page({
         });
     },
-  
+
+    // 保存图片到手机
+    savePic() {
+        console.log('保存图片');
+        var self = this;
+        // 获取用户的当前设置，返回值中有小程序已经向用户请求过的权限
+        this.getSetting().then((res) => {
+            // 判断用户是否授权了保存到相册的权限，如果没有发起授权
+            if (!res.authSetting['scope.writePhotosAlbum']) {
+                this.authorize().then(() => {
+                    // 同意授权后保存下载文件
+                    this.saveImage(self.data.shareImgPath)
+                        .then(() => {
+                            self.setData({
+                                showPoster: false
+                            });
+                        });
+                })
+            } else {
+                // 如果已经授权，保存下载文件
+                this.saveImage(self.data.shareImgPath)
+                    .then(() => {
+                        self.setData({
+                            showPoster: false
+                        });
+                    });
+            }
+
+        })
+    },
+
+
+    // 保存图片到系统相册
+    saveImage(saveUrl) {
+        var self = this;
+        return new Promise((resolve, reject) => {
+            wx.saveImageToPhotosAlbum({
+                filePath: saveUrl,
+                success: (res) => {
+                    wx.showToast({
+                        title: '保存成功',
+                        duration: 1000,
+                    });
+                    self.setData({
+                        showPlaybill: 'true'
+                    });
+                    resolve();
+                },
+                fail: () => {
+                    wx.showToast({
+                        title: '保存失败',
+                        duration: 1000,
+                    });
+                }
+            })
+        })
+    },
+
+    // 获取用户已经授予了哪些权限
+    getSetting() {
+        return new Promise((resolve, reject) => {
+            wx.getSetting({
+                success: res => {
+                    resolve(res)
+                }
+            })
+        })
+    },
+
+    // 发起首次授权请求
+    authorize() {
+        // isFirst 用来记录是否为首次发起授权，
+        // 如果首次授权拒绝后，isFirst赋值为1
+        let isFirst = wx.getStorageSync('isFirst') || 0;
+        return new Promise((resolve, reject) => {
+            wx.authorize({
+                scope: 'scope.writePhotosAlbum',
+                // 同意授权
+                success: () => {
+                    resolve();
+                },
+                // 拒绝授权,这里是用户拒绝授权后的回调
+                fail: res => {
+                    if(isFirst === 0) {
+                        wx.setStorageSync('isFirst', 1);
+                        wx.showToast({
+                            title: '保存失败',
+                            icon: 'none',
+                            duration: 1000
+                        })
+                    } else {
+                        this.showModal();
+                    }
+                    console.log('拒绝授权');
+                    reject();
+                }
+            })
+        })
+    },
+
+
+
+
 })