UIWebView 需改userAgent 并且加载微信公共账号

需要注意的是需要获取原来的UIWebView的User-Agent,然后拼接上自己新的User-Agent，貌似直接替换原来的无效，另外，修改User-Agent之后重新创建UIWebView加载网页

​// 修改ua

UIWebView* tempWebView = [[UIWebViewalloc] initWithFrame:CGRectZero];

NSString* userAgent = [tempWebViewstringByEvaluatingJavaScriptFromString:@"navigator.userAgent"];

NSString *ua = [NSStringstringWithFormat:@"%@\\%@",

userAgent,

@" / ZhuShou Browser"];

[[NSUserDefaultsstandardUserDefaults] registerDefaults:@{@"UserAgent" : ua,@"User-Agent" : ua}];

NSMutableURLRequest *request =[NSMutableURLRequestrequestWithURL:[NSURLURLWithString:myBxd(self.uid)]];

web = [[UIWebViewalloc] init];

web.frame = CGRectMake(0, navHeight, ApplicationScreenWidth,ApplicationScreenHeight - navHeight);

[web loadRequest:request];

web.delegate = self;

[websizeToFit];

[self.viewaddSubview:web];