如何检查您的 NSURLConnection 给您的响应来自哪个 URL？

Question

在 iOS5 之前，我可以测试从我的代码中得到响应的 URL 如下所示：

- (void)connectionDidFinishLoading:(NSURLConnection *)connection 
{
    returnString = [[[NSMutableString alloc] initWithData:responseData encoding: NSUTF8StringEncoding] autorelease];
    NSString * currentParseString = [NSString stringWithFormat:@"%@",connection];
    NSLog(@"Currently Parsing: %@",currentParseString);
}

我的日志会打印出“Currently Parsing: http://www.myinfo.com/parser....”

然后我可以使用它来测试并发送到不同的 IF 语句。我现在的问题是，在 iOS5 中，connection 不再作为 URL 打印，而是作为内存块打印 <NSURLConnection: 0x6a6b6c0> 我怎样才能让它再次打印为 URL，所以我不必重写我的 IF声明？

Answer 1

我做了这样的事情：

- (void)connectionDidFinishLoading:(NSURLConnection *)connection 
{
   NSLog(@"%@",[connection currentRequest]);
}

Answer 2

当您将%@ 放入NSString 格式时，它将被[object description] 替换。苹果一定改变了[connection description] 返回的内容。在任何情况下都很难依赖它，因为它不能保证采用任何特定格式。

您可以通过多种方式更改您的实现。最快的方法可能是创建一个非常简单的NSURLConnection 子类，如下所示：

// MyNSURLConnection.h
// code written assuming ARC
@interface MyNSURLConnection : NSURLConnection
@property (nonatomic, strong) NSURL *requestURL;
@end

// MyNSURLConnection.m
// example override, you can override all the init/connection methods
- (id)initWithRequest:(NSURLRequest *)request delegate:(id)delegate startImmediately:(BOOL)startImmediately {
    self = [super initWithRequest:request delegate:delegate startImmediately:startImmediately;
    if (self) {
        self.requestURL = request.URL;
    }
    return self;
}

// in your MyNSURLConnectionDelegate controller
- (void)connectionDidFinishLoading:(MyNSURLConnection *)connection {
    returnString = [[[NSMutableString alloc] initWithData:responseData encoding: NSUTF8StringEncoding] autorelease];
    NSString * currentParseString = [NSString stringWithFormat:@"%@",connection.requestURL];
    NSLog(@"Currently Parsing: %@",currentParseString);
    // rest of your code
}