5+微信授权登录无法满足开发需求，怎么办？

5+中的微信授权登录，获取到的code，会直接被用掉以获取token并用户信息等，而我们的实际开发中，考虑用户信息安全问题，通常需要的是将获取到的code,发送给自己的服务器，由服务器另行向微信服务端请求获取token。
因此，在以HTML为主开发的app中，我们需要以插件的形式封装微信授权登录模块。
先行阅读官方文档，IOS平台第三方插件开发指导http://ask.dcloud.net.cn/docs/#//ask.dcloud.net.cn/article/67，
而后可参照官方实例：IOS指纹识别插件开发方法http://ask.dcloud.net.cn/article/1348

至此，基本上就对插件开发有了全面的了解，也知道如何入手了，甚至会觉得相当简单。
开始之前，先行按照官方文档配置好5+SDK的配置，并且调试成功。

1.注册插件
确定插件名字，并配置feature.plist文件。

2.在此，简单贴出个人在项目中用到的微信授权登录插件部分的代码，分为js和原生代码两部分,以供参考。

原生代码部分：

//
//  WXPluginHandle.h
//  TCM
//
//  Created by 晗 on 2018/8/24.
//  Copyright © 2018年 晗. All rights reserved.
//

#import "PGPlugin.h"
#import "PGMethod.h"

@interface WXPluginHandle : PGPlugin

- (void) onAppStarted:(NSDictionary*)options;

//js 调用
- (void)sendAuthRequest:(PGMethod *)command;

@end

//
//  WXPluginHandle.m
//  TCM
//
//  Created by 晗 on 2018/8/24.
//  Copyright © 2018年 晗. All rights reserved.
//

#import "WXPluginHandle.h"
#import "WXApi.h"

#define WX_AppID @"wxc19dd06331e9b5f0"

#define HHCodeNotiName @"wxplugin.code"

@interface WXPluginHandle()<WXApiDelegate>

@property (nonatomic,copy) NSString *codeStr;
@property(nonatomic, strong)NSDictionary *launchOptions;
@property (nonatomic, strong) PGMethod *codeCommand;
@property (nonatomic, copy) void(^myCodeBlock)(NSString *codeStr);

@end

@implementation WXPluginHandle


- (void)onAppStarted:(NSDictionary *)options{
    _launchOptions = options;

    [WXApi registerApp:WX_AppID];
}

//js中调用
- (void)sendAuthRequest:(PGMethod *)command{
    
    if(command){
         NSLog(@"添加监听事件");
        __weak typeof(self) weakSelf = self;
        [[NSNotificationCenter defaultCenter] addObserverForName:HHCodeNotiName object:nil queue:[NSOperationQueue currentQueue] usingBlock:^(NSNotification * _Nonnull note) {
            __strong typeof(weakSelf) strongSelf = weakSelf;
            if (command) {
                NSString *codeStr = note.userInfo[@"code"];
                NSLog(@"code:%@",codeStr);
                [strongSelf handleResultWithValue:codeStr command:command];
            }
            
            //移除监听
            [[NSNotificationCenter defaultCenter] removeObserver:strongSelf];
        }];
        
         NSLog(@"唤醒微信");
        SendAuthReq* req = [[SendAuthReq alloc] init];
        req.scope = @"snsapi_userinfo,snsapi_base";
        req.state = @"mxth";
       [WXApi sendReq:req];
       
//        [self handleResultWithValue:[NSNumber numberWithBool:value] command:command];
    }
}





- (void)handleResultWithValue:(id)value command:(PGMethod *)command{
    PDRPluginResult *result = nil;
    PDRCommandStatus status = PDRCommandStatusOK;
    
    if ([value isKindOfClass:[NSString class]]) {
        value  = [value stringByAddingPercentEncodingWithAllowedCharacters:[NSCharacterSet URLQueryAllowedCharacterSet]];
        result = [PDRPluginResult resultWithStatus:status messageAsString:value];
    }else if ([value isKindOfClass:[NSArray class]]) {
        result = [PDRPluginResult resultWithStatus:status messageAsArray:value];
    }else if ([value isKindOfClass:[NSDictionary class]]){
        result = [PDRPluginResult resultWithStatus:status messageAsDictionary:value];
    }else if ([value isKindOfClass:[NSNull class]]){
        result = [PDRPluginResult resultWithStatus:status];
    }else if ([value isKindOfClass:[NSNumber class]]){
        CFNumberType numberType = CFNumberGetType((CFNumberRef)value);
        if (numberType == kCFNumberIntType) {
            result = [PDRPluginResult resultWithStatus:status messageAsInt:[value intValue]];
        } else  {
            result = [PDRPluginResult resultWithStatus:status messageAsDouble:[value doubleValue]];
        }
    }else{
        NSString *error = [NSString stringWithFormat:@"unrecognized type: %@",NSStringFromClass([value class])];
        NSLog(@"%@",error);
        result = [PDRPluginResult resultWithStatus:PDRCommandStatusError messageAsString:error];
    }
    if (command == self.codeCommand) {
        result.keepCallback = true;
    }
    [self toCallback:command.arguments[0] withReslut:[result toJSONString]];
    
}


@end

下面为js代码部分

document.addEventListener('plusready', function() {
    var _BARCODE = 'WXPlugin' // 插件名称
    var B = window.plus.bridge

    var WXPluginHandle = {
        code: "",
        callNative: function(fname, args, successCallback) {
            var callbackId = this.getCallbackId(successCallback, this.errorCallback)
            if (args != null) {
                args.unshift(callbackId)
            } else {
                var args = [callbackId]
            }
            return B.exec(_BARCODE, fname, args)
        },
        getCallbackId: function(successCallback) {
            var success = typeof successCallback !== 'function' ? null : function(args) {
                successCallback(args)
            }
            return B.callbackId(success, this.errorCallback)
        },
        errorCallback: function(errorMsg) {
            console.log('Javascript callback error: ' + errorMsg)
        },
        fireDocumentEvent: function(ename, jsonData) {
            var event = document.createEvent('HTMLEvents')
            event.initEvent(ename, true, true)
            event.eventType = 'message'

            jsonData = JSON.stringify(jsonData)
            var data = JSON.parse(jsonData)
            event.arguments = data
            document.dispatchEvent(event)
        },

        //Public
        sendAuthRequest: function(callback) {
            this.callNative("sendAuthRequest", null, callback);
        },

        init: function() {
            if (plus.os.name == 'Android') {
                this.callNative('init', null, null)
            }
        },

    }
    WXPluginHandle.init()
    window.plus.WXPlugin = WXPluginHandle
}, true)