抽个时间总结一下微信支付；
需要和微信申请APPID然后审核 （300块大洋）
首先从官网上下载一个demo[网址]（https://open.weixin.qq.com/cgi-bin/showdocument?action=dir_list&t=resource/res_list&verify=1&id=1417694084&token=1b41037aa554145bdb95b7430eb139850a46b1d7&lang=zh_CN）；
如果你用模拟器运行这个demo是看不到什么效果的，要用真机调试；
-
根据demo中的示例，将支付代码提取出来；
在AppDelegate中注册
在-(BOOL)application:didFinishLaunchingWithOptions:launchOptions中注册：
[WXApi registerApp:@"wxb4ba3c02aa476ea1" withDescription:nil];
配置应用间跳转的URL：
点击支付
NSString *res = [WXplay jumpToBizPay];
if( ![@"" isEqual:res] ){
UIAlertView *alter = [[UIAlertView alloc] initWithTitle:@"支付失败" message:res delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];
[alter show];
[alter release];
}
WXplay.m
+ (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"]; // 商户号
req.prepayId = [dict objectForKey:@"prepayid"];// 预支付交易会话ID
req.nonceStr = [dict objectForKey:@"noncestr"];//随机字符串
req.timeStamp = stamp.intValue; //时间戳
req.package = [dict objectForKey:@"package"];//Sign=WXPay
req.sign = [dict objectForKey:@"sign"];//签名
[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";
}
}
WXApiManager 需要遵守 WXApiDelegate
实现单例：
+(instancetype)sharedManager {
static dispatch_once_t onceToken;
static WXApiManager *instance;
dispatch_once(&onceToken, ^{
instance = [[WXApiManager alloc] init];
});
return instance;
}
WXApiDelegate代理方法的实现
- 实现onResp方法、完成支付后，微信app会返回到商家app页面，并且回调onResp函数，开发者需要在该方法中接收通知，判断返回码，如果支付成功则去后台查询支付结果再展示给用户实际支付结果
-(void)onResp:(BaseResp *)resp {
if([resp isKindOfClass:[PayResp class]]){
//支付返回结果，实际支付结果需要去微信服务器端查询
NSString *strMsg,*strTitle = [NSString stringWithFormat:@"支付结果"];
switch (resp.errCode) {
case WXSuccess:
// 在此显示支付结果数据（从服务器获取）
strMsg = @"支付结果：成功！";
NSLog(@"支付成功－PaySuccess，retcode = %d", resp.errCode);
break;
default:
strMsg = [NSString stringWithFormat:@"支付结果：失败！retcode = %d, retstr = %@", resp.errCode,resp.errStr];
NSLog(@"错误，retcode = %d, retstr = %@", resp.errCode,resp.errStr);
break;
}
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:strTitle message:strMsg delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil, nil];
[alert show];
[alert release];
}
}
