手把手教你微信支付

1、从官方那里下载官方微信支付demo，百度一下微信开放平台，网址 https://pay.weixin.qq.com/wiki/doc/api/app.php?chapter=11_1

2、导入几个必要的文件夹，SDK1.6.2文件夹，Helper文件夹，Control文件夹

3、导入必要的库，要比官方文档多导入一个libc++.tbd这个库



4、这时候会报关于ARC的错，所以需要在下列这些地方加入-fno-objc-arc这句



5、在URL Types这里的URL Schemes加入微信id



6、在plist表添加一些东西



7、appdelegate.m文件下代码

#import "AppDelegate.h"#import "WXApiManager.h"@interface AppDelegate ()@end@implementation AppDelegate- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {    //向微信注册,这个账号要自己去微信公众平台申请注册，一般几个小时就好了    [WXApi registerApp:@"wxb4ba3c02aa476ea1" withDescription:@"我很帅"];    return YES;}

8、viewController.m文件下代码

#import "ViewController.h"#import "WXApiRequestHandler.h"#import "WXApiManager.h"@interface ViewController ()@end@implementation ViewController- (void)viewDidLoad {    [super viewDidLoad];    [self setInit];    // Do any additional setup after loading the view, typically from a nib.}-(void)setInit{    //判断有没有微信客户端，没有则隐藏微信支付按钮    if ([WXApi isWXAppInstalled]){    UIButton *button = [[UIButton alloc]initWithFrame:CGRectMake(100, 100, 100, 100)];    [button setTitle:@"微信支付" forState:UIControlStateNormal];    [button setTitleColor:[UIColor redColor] forState:UIControlStateNormal];    button.backgroundColor = [UIColor grayColor];    [button addTarget:self action:@selector(bizPay) forControlEvents:UIControlEventTouchUpInside];    [self.view addSubview:button];    }}-(void)bizPay{    NSString *res = [WXApiRequestHandler jumpToBizPay];    if( ![@"" isEqual:res] ){        UIAlertView *alter = [[UIAlertView alloc] initWithTitle:@"支付失败" message:res delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];        [alter show];    }    }

9、重要代码，微信支付核心代码

+ (NSString *)jumpToBizPay {
//============================================================    // V3&V4支付流程实现    // 注意:参数配置请查看服务器端Demo    // 更新时间：2015年11月20日    //============================================================    NSString *urlString   = @"http://wxpay.weixin.qq.com/pub_v2/app/app_pay.php?plat=ios";        //解析服务端返回json数据        NSError *error;        //加载一个NSURL对象        NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:urlString]];        //将请求的url数据放到NSData对象中        NSData *response = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];        if ( response != nil) {            NSMutableDictionary *dict = NULL;            //IOS5自带解析类NSJSONSerialization从response中解析出数据放到字典中            dict = [NSJSONSerialization JSONObjectWithData:response options:NSJSONReadingMutableLeaves error:&error];                        NSLog(@"url:%@",urlString);            if(dict != nil){                NSMutableString *retcode = [dict objectForKey:@"retcode"];                if (retcode.intValue == 0){                    NSMutableString *stamp  = [dict objectForKey:@"timestamp"];                                        //调起微信支付                    PayReq* req             = [[[PayReq alloc] init]autorelease];                    req.partnerId           = [dict objectForKey:@"partnerid"];                    req.prepayId            = [dict objectForKey:@"prepayid"];                    req.nonceStr            = [dict objectForKey:@"noncestr"];                    req.timeStamp           = stamp.intValue;                    req.package             = [dict objectForKey:@"package"];                    req.sign                = [dict objectForKey:@"sign"];                    [WXApi sendReq:req];                    //日志输出                    NSLog(@"appid=%@\npartid=%@\nprepayid=%@\nnoncestr=%@\ntimestamp=%ld\npackage=%@\nsign=%@",[dict objectForKey:@"appid"],req.partnerId,req.prepayId,req.nonceStr,(long)req.timeStamp,req.package,req.sign );                    return @"";                }else{                    return [dict objectForKey:@"retmsg"];                }            }else{                return @"服务器返回错误，未获取到json对象";            }        }else{            return @"服务器返回错误";        }}

遇到问题：1、跳转到微信端后，没有支付，只有一个确定按钮解决方案：查看id和参数匹配对不对，或者叫后台重启下接口。

源代码网址下载： https://github.com/mooner2122/-weixinpay