IOS微信登录封装类

AppDelegate+WXLogin.h

#import "AppDelegate.h"

#import "WXApi.h"

@interface AppDelegate (WXLogin)<WXApiDelegate>
- (void)WXLogin;
@end

AppDelegate+WXLogin.m

#import "AppDelegate+WXLogin.h"

#import "WXLogin.h"

@implementation AppDelegate (WXLogin)
/**
*  微信登录的调用方法，获取code
*/
- (void)WXLogin
{
    [[WXLogin sharedInstance] sendAuthRequest];
}

/**
*  授权回调时用
*/
- (void)onResp:(BaseResp *)resp
{
    /*
     ErrCode ERR_OK = 0(用户同意)
     ERR_AUTH_DENIED = -4（用户拒绝授权）
     ERR_USER_CANCEL = -2（用户取消）
     code    用户换取access_token的code，仅在ErrCode为0时有效
     state   第三方程序发送时用来标识其请求的唯一性的标志，由第三方程序调用sendReq时传入，由微信终端回传，state字符串长度不能超过1K
     lang    微信客户端当前语言
     country 微信用户当前国家信息
     */
    SendAuthResp *aresp = (SendAuthResp *)resp;
    if (aresp.errCode == 0) {
        NSString *code = aresp.code;
        [[WXLogin sharedInstance] getAccess_TokenWithCode:code withResult:^(WXLoginInfo *loginInfo) {
            self.wxloginCompleteBlock(loginInfo);
        }];
    }
}

- (BOOL)application:(UIApplication *)application handleOpenURL:(NSURL *)url
{
    return [WXApi handleOpenURL:url delegate:self];
}

- (BOOL)application:(UIApplication *)application openURL:(NSURL *)url sourceApplication:(NSString *)sourceApplication annotation:(id)annotation
{
    return [WXApi handleOpenURL:url delegate:self];
}

@end

WXLogin.h

#import <Foundation/Foundation.h>

#import <UIKit/UIKit.h>

@interface WXLoginInfo : NSObject
@property NSString *nickName;
@property NSString *headUrl;
@property NSString *openId;
@end

typedef void (^Result)(WXLoginInfo *loginInfo);

@interface WXLogin : NSObject
/**
*  设置单例模式
*/
+ (instancetype)sharedInstance;
/**
*  向微信发送结构体消息
*/
- (void)sendAuthRequest;
/**
*  通过code换取access_token
*/
- (void)getAccess_TokenWithCode:(NSString *)code withResult:(Result)result;

@end

WXLogin.m

#define WXAppID @""

#define WXAppSecret @""

#import "WXLogin.h"
#import "WXApi.h"
#import "AppDelegate+WXLogin.h"

@interface WXLogin()
@property (copy) Result result;
@property WXLoginInfo *loginInfo;
@end

@implementation WXLogin
/**
*  设计单例模式，只创建一次token
*/
+ (instancetype)sharedInstance
{
    static id instance;
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        instance = [self new];
    });
    return  instance;
}

- (id)init
{
    self = [super init];
    if (self) {
        [WXApi registerApp:WXAppID];
    }
    return self;
}

- (void)sendAuthRequest
{
    SendAuthReq *req = [[SendAuthReq alloc] init];
    req.scope = @"snsapi_userinfo,snsapi_base"; //应用授权作用域，如获取用户个人信息则填写snsapi_userinfo
    req.state = @"0789";  //用于保持请求和回调的状态，授权请求后原样带回给第三方。该参数可用于防止csrf攻击（跨站请求伪造攻击），建议第三方带上该参数，可设置为简单的随机数加session进行校验

    //第三方向微信终端发送一个SendAuthReq消息结构
    [WXApi sendReq:req];
}

/**
*  通过code来获取用户的access_token
*/
- (void)getAccess_TokenWithCode:(NSString *)code withResult:(Result)result
{
    _result = result;
    NSString *url = [NSString stringWithFormat:@"https://api.weixin.qq.com/sns/oauth2/access_token?appid=%@&secret=%@&code=%@&grant_type=authorization_code",WXAppID, WXAppSecret, code];
    dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
        NSURL *zoneUrl = [NSURL URLWithString:url];
        NSString *zoneStr = [NSString stringWithContentsOfURL:zoneUrl encoding:NSUTF8StringEncoding error:nil];
        NSData *data = [zoneStr dataUsingEncoding:NSUTF8StringEncoding];
        dispatch_async(dispatch_get_main_queue(), ^{
            if (data) {
                NSDictionary *dict = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers error:nil];
                 JLLog(@"access_token: %@",[dict objectForKey:@"access_token"]);
                if (!self.loginInfo) {
                    self.loginInfo = [[WXLoginInfo alloc] init];
                }
                self.loginInfo.openId = [dict objectForKey:@"openid"];
                [self getUserInfoWithToken:[dict objectForKey:@"access_token"] OpenID:@"openid"];
            }
        });
    });
}

/**
*  通过token来获取用户的个人信息
*/
- (void)getUserInfoWithToken:(NSString *)token OpenID:(NSString *)openid
{
    NSString *url = [NSString stringWithFormat:@"https://api.weixin.qq.com/sns/userinfo?access_token=%@&openid=%@",token, openid];

    dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
        NSURL *zoneUrl = [NSURL URLWithString:url];
        NSString *zoneStr = [NSString stringWithContentsOfURL:zoneUrl encoding:NSUTF8StringEncoding error:nil];
        NSData *data = [zoneStr dataUsingEncoding:NSUTF8StringEncoding];
        dispatch_async(dispatch_get_main_queue(), ^{
            if (data) {
                NSDictionary *dict = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers error:nil];
                self.loginInfo.nickName = [dict objectForKey:@"nickname"];
                self.loginInfo.headUrl = [dict objectForKey:@"headimagurl"];
                _result(self.loginInfo);
            }
        });
    });
}

@end
@implementation WXLoginInfo
@end

UIViewController

/**

*  微信登录
*/
- (void)wxLogin
{
    AppDelegate *delegate = (AppDelegate *)[UIApplication sharedApplication].delegate;
    delegate.wxloginCompleteBlock = ^(WXLoginInfo *loginInfo){
        JLLog(@"nickname: %@",loginInfo.nickName);

    };
    [delegate WXLogin];
}

以上为IOS第三方微信登录的封装

posted @ 2015-07-03 16:36 aprogrammer 阅读(571) 评论(0) 编辑收藏举报

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