iphone - 如何使用用户代理初始化 NSURLRequest

Question

通常 http 用户代理是这样的:

Mozilla/5.0 (iPhone; U; CPU iPhone OS 3_0 like Mac OS X; en-us) AppleWebKit/528.18 (KHTML, like Gecko) Version/4.0 Mobile/7A341

如果我

NSMutableURLRequest *newUserAgentRequest = (NSMutableURLRequest*)[NSURLRequest requestWithURL:self.url];
    NSString *userAgent = [newUserAgentRequest valueForHTTPHeaderField:@"User-Agent"];

userAgent 为 nil 或空意味着

NSMutableURLRequest *newUserAgentRequest = (NSMutableURLRequest*)[NSURLRequest requestWithURL:self.url];

没有包含用户代理，如何使用用户代理发起请求？

Answer 1

我只是像下面那样做了。这适用于 iOS 设备:

NSMutableURLRequest *urlRequest = [[NSMutableURLRequest alloc] 
                                       initWithURL:[NSURL URLWithString:[yourURL stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]]];
NSString *userAgent = [NSString stringWithFormat:@"%@ %@",[UIDevice currentDevice].systemName,[UIDevice currentDevice].systemVersion];
[urlRequest setValue:userAgent forHTTPHeaderField:@"User-Agent"];

希望对你有帮助