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我是 IOS 新手，但我仍然不确定我是否遇到了错误，或者我做错了什么。尽管考虑到我得到的奇怪行为，我倾向于认为这是 IOS 尝试重用连接的一个错误。我想知道是否有人知道这一点以及是否有解决方法。

发生在启用了 IOS 6.1 ARC 的模拟器上。更奇怪的是我不能在手机上让它崩溃，所以现在我想知道我是否应该害怕这个。

我正在同时运行多个 http 连接，一旦连接完成或失败，我将开始一个新连接。到目前为止，我有 3 种情况：

案例1：服务器存在且工作，每次请求成功，工作。

情况 2：服务器存在但不会在给定端口上侦听，工作正常。

案例3：服务器离线（例如机器宕机），100-2000次请求后会崩溃。

编辑：根据 NicholasHart 的建议修改了代码，问题依旧

#import "ViewController.h"

@interface ViewController ()
{
    NSURLRequest *request;
}
@end

@implementation ViewController

- (IBAction)test:(id)sender {
    request = [NSURLRequest requestWithURL:[NSURL URLWithString:@"http://192.168.1.178:8888/r.php"]
                                                    cachePolicy:NSURLCacheStorageNotAllowed
                                                timeoutInterval:10.0];
    NSLog(@"starting %@", [NSThread currentThread]);
    NSURLConnection *conn;

    for(int i=0;i<6;i++) conn = [[NSURLConnection alloc] initWithRequest:request delegate:self];
}

#pragma mark NSURLConnection Delegate Methods
- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response {}
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data {}
- (NSCachedURLResponse *)connection:(NSURLConnection *)connection willCacheResponse:(NSCachedURLResponse*)cachedResponse {return nil;}
- (void)connectionDidFinishLoading:(NSURLConnection *)connection
{
    //[connection cancel]; //not needed, suggested by NicholasHart
    NSLog(@"ok %@", [NSThread currentThread]);
    NSURLConnection *conn = [[NSURLConnection alloc] initWithRequest:request delegate:self];
}

- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error{
    //[connection cancel]; //not needed, suggested by NicholasHart
    NSLog(@"error %@", [NSThread currentThread]);
    NSURLConnection *conn = [[NSURLConnection alloc] initWithRequest:request delegate:self];
}
@end

对于案例 3，我有不同的崩溃，类似于：


libdispatch.dylib`_dispatch_retain:
0x49f98f0:  movl   4(%esp), %eax
0x49f98f4:  cmpl   $2147483647, 4(%eax)
0x49f98fb:  je     0x49f9910                 ; _dispatch_retain + 32
0x49f98fd:  addl   $4, %eax
0x49f9900:  movl   $1, %ecx
0x49f9905:  lock
0x49f9906:  xaddl  %ecx, (%eax)
0x49f9909:  incl   %ecx
0x49f990a:  testl  %ecx, %ecx
0x49f990c:  jg     0x49f9910                 ; _dispatch_retain + 32
0x49f990e:  ud2
0x49f9910:  ret
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