【iOS】微信第三方登录_移动开发_编程开发_程序员俱乐部

一：下载SDK

https://open.weixin.qq.com/cgi-bin/frame?t=resource/res_main_tmpl&verify=1&lang=zh_CN&target=res/app_download_ios

二：配置环境

将文件拖入工程

配置URL scheme

三：DEFINE

 1 #ifndef LoginDemo_Define_h
 2 #define LoginDemo_Define_h
 3 
 4 #define kAppDescription   @“*******"
 5 
 6 #define kWeiXinAppId               @“wx**************"
 7 #define kWeiXinAppSecret           @“4f85d************011afa8a23d5a"
 8 
 9 #define kWeiXinAccessToken   @"WeiXinAccessToken"
10 #define kWeiXinOpenId             @"WeiXinOpenId"
11 #define kWeiXinRefreshToken  @"WeiXinRefreshToken"
12 
13 
14 #endif

四：AppDelegate.h

1 #import <UIKit/UIKit.h>
2 
3 #import "WeChatSDK_64/WXApi.h"
4 
5 @interface AppDelegate : UIResponder <UIApplicationDelegate,WXApiDelegate>
6 
7 @property (strong, nonatomic) UIWindow *window;
8 
9 @end

五：AppDelegate.m

 1 #import "AppDelegate.h"
 2 #import "RootViewController.h"
 3 #import "Define.h"
 4 
 5 @interface AppDelegate ()
 6 {
 7     RootViewController *root;
 8 }
 9 @end
10 
11 @implementation AppDelegate
12 
13 
14 - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
15 {
16     //….
17 
18     root = [[RootViewController alloc]init];
19     self.window.rootViewController = root;
20     
21     [WXApi registerApp:kWeiXinAppId withDescription:kAppDescription];
22     
23     return YES;
24 }
25 
26 - (BOOL)application:(UIApplication *)application handleOpenURL:(NSURL *)url
27 {
28     return [WXApi handleOpenURL:url delegate:self];
29 }
30 
31 - (BOOL)application:(UIApplication *)application openURL:(NSURL *)url sourceApplication:(NSString *)sourceApplication annotation:(id)annotation
32 {
33     return [WXApi handleOpenURL:url delegate:self];
34 }
35 
36 - (void)onReq:(BaseReq*)req
37 {
38     /*
39      onReq是微信终端向第三方程序发起请求，要求第三方程序响应。第三方程序响应完后必须调用sendRsp返回。在调用sendRsp返回时，会切回到微信终端程序界面。
40      */
41 }
42 
43 - (void)onResp:(BaseResp*)resp
44 {
45     /*
46      如果第三方程序向微信发送了sendReq的请求，那么onResp会被回调。sendReq请求调用后，会切到微信终端程序界面。
47      */
48     [root.weixinViewController getWeiXinCodeFinishedWithResp:resp];
49 }

六：发起授权请求

1 - (void)loginButtonClicked
2 {
3     SendAuthReq* req =[[SendAuthReq alloc ] init];
4     req.scope = @"snsapi_userinfo";
5     req.state = kAppDescription;
6     [WXApi sendReq:req];
7 }

调用方法后会弹出授权页面，完成授权后调用AppDelegate中的- (void)onResp:(BaseResp*)resp

七：处理返回数据，获取code

 1 - (void)getWeiXinCodeFinishedWithResp:(BaseResp *)resp
 2 {
 3     if (resp.errCode == 0)
 4     {
 5         statusCodeLabel.text = @"用户同意";
 6         SendAuthResp *aresp = (SendAuthResp *)resp;
 7         [self getAccessTokenWithCode:aresp.code];
 8         
 9     }else if (resp.errCode == -4){
10         statusCodeLabel.text = @"用户拒绝";
11     }else if (resp.errCode == -2){
12         statusCodeLabel.text = @"用户取消";
13     }
14 }

八：使用code获取access token

 1 - (void)getAccessTokenWithCode:(NSString *)code
 2 {
 3     NSString *urlString =[NSString stringWithFormat:@"https://api.weixin.qq.com/sns/oauth2/access_token?appid=%@&secret=%@&code=%@&grant_type=authorization_code",kWeiXinAppId,kWeiXinAppSecret,code];
 4     NSURL *url = [NSURL URLWithString:urlString];
 5     
 6     dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
 7         
 8         NSString *dataStr = [NSString stringWithContentsOfURL:url encoding:NSUTF8StringEncoding error:nil];
 9         NSData *data = [dataStr dataUsingEncoding:NSUTF8StringEncoding];
10         
11         dispatch_async(dispatch_get_main_queue(), ^{
12             
13             if (data)
14             {
15                 NSDictionary *dict = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers error:nil];
16                 
17                 if ([dict objectForKey:@"errcode"])
18                 {
19 //获取token错误       
20                 }else{                 
21 //存储AccessToken OpenId RefreshToken以便下次直接登陆
22 //AccessToken有效期两小时，RefreshToken有效期三十天         
23                     [self getUserInfoWithAccessToken:[dict objectForKey:@"access_token"] andOpenId:[dict objectForKey:@"openid"]];
24                 }
25             }
26         });
27     });
28     
29     /*
30      正确返回
31      "access_token" = “Oez*****8Q";
32      "expires_in" = 7200;
33      openid = ooVLKjppt7****p5cI;
34      "refresh_token" = “Oez*****smAM-g";
35      scope = "snsapi_userinfo";
36      */
37     
38     /*
39      错误返回
40      errcode = 40029;
41      errmsg = "invalid code";
42      */
43 }

九：使用AccessToken获取用户信息

 1 - (void)getUserInfoWithAccessToken:(NSString *)accessToken andOpenId:(NSString *)openId
 2 {
 3     NSString *urlString =[NSString stringWithFormat:@"https://api.weixin.qq.com/sns/userinfo?access_token=%@&openid=%@",accessToken,openId];
 4     NSURL *url = [NSURL URLWithString:urlString];
 5     
 6     dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
 7         
 8         NSString *dataStr = [NSString stringWithContentsOfURL:url encoding:NSUTF8StringEncoding error:nil];
 9         NSData *data = [dataStr dataUsingEncoding:NSUTF8StringEncoding];
10         
11         dispatch_async(dispatch_get_main_queue(), ^{
12             
13             if (data)
14             {
15                 NSDictionary *dict = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers error:nil];
16                 
17                 if ([dict objectForKey:@"errcode"])
18                 {
19 //AccessToken失效
20                     [self getAccessTokenWithRefreshToken:[[NSUserDefaults standardUserDefaults]objectForKey:kWeiXinRefreshToken]];
21                 }else{
22 //获取需要的数据                    
23                 }
24             }
25         });
26     });
27 
28   /*
29      city = ****;
30      country = CN;
31      headimgurl = "http://wx.qlogo.cn/mmopen/q9UTH59ty0K1PRvIQkyydYMia4xN3gib2m2FGh0tiaMZrPS9t4yPJFKedOt5gDFUvM6GusdNGWOJVEqGcSsZjdQGKYm9gr60hibd/0";
32      language = "zh_CN";
33      nickname = “****";
34      openid = oo*********;
35      privilege =     (
36      );
37      province = *****;
38      sex = 1;
39      unionid = “o7VbZjg***JrExs";
40      */
41     
42     /*
43      错误代码
44      errcode = 42001;
45      errmsg = "access_token expired";
46      */
47 }

十：使用RefreshToken刷新AccessToken

该接口调用后，如果AccessToken未过期，则刷新有效期，如果已过期，更换AccessToken。

 1 - (void)getAccessTokenWithRefreshToken:(NSString *)refreshToken
 2 {
 3     NSString *urlString =[NSString stringWithFormat:@"https://api.weixin.qq.com/sns/oauth2/refresh_token?appid=%@&grant_type=refresh_token&refresh_token=%@",kWeiXinAppId,refreshToken];
 4     NSURL *url = [NSURL URLWithString:urlString];
 5     
 6     dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
 7         
 8         
 9         NSString *dataStr = [NSString stringWithContentsOfURL:url encoding:NSUTF8StringEncoding error:nil];
10         NSData *data = [dataStr dataUsingEncoding:NSUTF8StringEncoding];
11         
12         dispatch_async(dispatch_get_main_queue(), ^{
13             
14             if (data)
15             {
16                 NSDictionary *dict = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers error:nil];
17                 
18                 if ([dict objectForKey:@"errcode"])
19                 {
20 //授权过期                    
21                 }else{
22 //重新使用AccessToken获取信息
23                 }
24             }
25         });
26     });
27     
28     
29     /*
30      "access_token" = “Oez****5tXA";
31      "expires_in" = 7200;
32      openid = ooV****p5cI;
33      "refresh_token" = “Oez****QNFLcA";
34      scope = "snsapi_userinfo,";
35      */
36     
37     /*
38      错误代码
39      "errcode":40030,
40      "errmsg":"invalid refresh_token"
41      */
42 }