Question

我正在使用NSURLConnection sendSynchronousRequest下载数据，并在该声明中崩溃。

代码如下：

_url = [NSURL URLWithString:[urlString urlEncodeUsingEncoding:NSUTF8StringEncoding]];
_urlRequest = [[NSMutableURLRequest alloc] initWithURL:self.url];

NSHTTPURLResponse *response = nil;
NSError *error = nil;

if(![self isCancelled])
 {
       _receivedData = [NSURLConnection sendSynchronousRequest:_urlRequest returningResponse:&response
                                                                    error:&error];
 }
 _error = error;

原因：

* 由于未捕获的异常而终止应用 'NSInvalidArgumentException'，原因：' - [__ NSCFType URL]：无法识别选择器发送到实例0x1cd2eaf0'

当我回溯时，我得到了这个：

线程＃7：tid = 0x240f，0x397a1350 libsystem_kernel.dylib __pthread_kill + 8, queue = 'com.apple.root.default-priority', stop reason = signal SIGABRT frame #0: 0x397a1350 libsystem_kernel.dylib __ pthread_kill + 8   帧＃1：0x39718122 libsystem_c.dylib pthread_kill + 58 frame #2: 0x39754972 libsystem_c.dylib abort + 94   第3帧：0x38cf2d4e libc ++ abi.dylib abort_message + 74 frame #4: 0x38cefff8 libc++abi.dylib default_terminate（）+ 24   帧＃5：0x392a3a76 libobjc.A.dylib _objc_terminate() + 146 frame #6: 0x38cf007a libc++abi.dylib safe_handler_caller（void（*）（））+ 78   帧＃7：0x38cf0114 libc ++ abi.dylib std::terminate() + 20 frame #8: 0x38cf1512 libc++abi.dylib __ cxa_throw + 122   帧＃9：0x392a39be libobjc.A.dylib objc_exception_throw + 94 frame #10: 0x31626e06 CoreFoundation - [NSObject（NSObject）doesNotRecognizeSelector：] + 170   帧＃11：0x31625530 CoreFoundation ___forwarding___ + 392 frame #12: 0x3157cf68 CoreFoundation _ CF_forwarding_prep_0 + 24   帧＃13：0x31f5e21e基金会+[NSURLConnection sendSynchronousRequest:returningResponse:error:] + 334 * frame #14: 0x001268d0 Rangeela - [RGFeedOperation main]（自我= 0x1cd35180，   RGFeedOperation.m上的_cmd = 0x370c3394）+ 3284：90   帧＃15：0x31eb05c0基金会-[__NSOperationInternal start] + 840 frame #16: 0x31f28be2 Foundation __ block_global_6 + 102   帧＃17：0x396bb11e libdispatch.dylib _dispatch_call_block_and_release + 10 frame #18: 0x396c9258 libdispatch.dylib _ dispatch_root_queue_drain + 260   帧＃19：0x396c93b8 libdispatch.dylib _dispatch_worker_thread2 + 84 frame #20: 0x396efa10 libsystem_c.dylib _ pthread_wqthread + 360

有人可以帮我解决这个问题吗？

Answer 1

查看错误消息，您尝试将方法发送给没有该方法的对象。仔细检查所有声明，确保将正确类型的对象发送到崩溃的例程中。您是否发送了需要NSURLResponse或NSURLConnection的NSURL？

NSURLConnection sendSynchronousRequest在慢速网络上崩溃

1 个答案: