小编fyx*_*yry的帖子

我有一个NSOperationQueue,maxConcurrentOperationCount = 1,

和自定义NSOperation有一个属性是块,

当iOS 9.x中的NSOperationQueue addOperation,应用程序崩溃时,

NSOperation不是零.

以下是Apple崩溃报告,但我不能再出现:

Exception Type:  EXC_BAD_ACCESS (SIGSEGV)
Exception Subtype: KERN_INVALID_ADDRESS at 0x1000000013ed199e

0   Foundation 0x0000000182f3b4e8 ____addOperations_block_invoke607 + 524 (NSOperation.m:193)
1   Foundation 0x0000000182f3b488 ____addOperations_block_invoke607 + 428 (NSOperation.m:204)
2   Foundation 0x0000000182f26170 -[NSObject(NSKeyValueObservingPrivate) _changeValueForKeys:count:maybeOldValuesDict:usingBlock:] + 672 (NSKeyValueObserving.m:2406)
3   Foundation 0x0000000182e7afc0 -[NSObject(NSKeyValueObservingPrivate) _changeValueForKey:key:key:usingBlock:] + 64 (NSKeyValueObserving.m:2432)
4   Foundation 0x0000000182f392e4 __addOperations + 1400 (NSOperation.m:2100)

谢谢!

任何人:

我想使用一个宏来打印日志,接下来,

#define isaObject(parameter) _Generic((parameter), id: YES, id __strong: YES, default: NO)
#define kNSLog(parameter) do                   \
    {                                          \
        BOOL is = isaObject((parameter));      \
        if (is)                                \
        {                                      \
            NSLog(@"----Yes : %@", parameter); \
        }                                      \
        else                                   \
        {                                      \
            NSLog(@"----No : %d", parameter);  \
        }                                      \
    } while (NO)


int i = 99;
NSString * s = @"abcd";

kNSLog(i);
kNSLog(s);

然后,编译器发出警告"Format指定类型'int',但参数的类型为'NSString*'".

怎么修改,拜托？

我有一个NSURLProtocol的子类，NSURLConnection运作良好。

并且[NSURLSession sharedSession]也很好用。

但是，[NSURLSession sessionWithConfiguration：configuration]不起作用，

我叫[NSURLProtocol registerClass：NSURLProtocolSubclass.class];

怎么了

NSString * stringUrl = @"https://www.apple.com/";
NSURL * url = [NSURL URLWithString:stringUrl];
NSMutableURLRequest * urlRequest = [NSMutableURLRequest requestWithURL:url];
urlRequest.HTTPMethod = @"GET";

NSURLSessionConfiguration * configuration = [NSURLSessionConfiguration ephemeralSessionConfiguration];
configuration.timeoutIntervalForResource = 20.0;

//this can work, but I cann't edit.
//configuration.protocolClasses = @[NSURLProtocolSubclass.class];

//this can work.
NSURLSession * urlSession = [NSURLSession sharedSession];

//this not work.
//NSURLSession * urlSession = [NSURLSession sessionWithConfiguration:configuration];

//Task.
NSURLSessionDataTask * task = [urlSession dataTaskWithRequest:urlRequest completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
    NSHTTPURLResponse …