我正在尝试通过以下方法将块用作 API 请求的回调。此方法采用嵌套在此方法的 Block 中的 Block。它有效......但是，
如果调用此方法的对象被释放，NSJSONSerialization 会转储出大量内存泄漏。一切都在运行时，一切都很好。泄漏仅在请求对象消失后发生。泄漏几乎是所有 NSPlaceHolder 类型。
我无能为力，任何想法都将不胜感激！
- (void)sendRequestUsingNSURLConnectionWith:(NSURLRequest *)request andCallback:(void (^)(id))handler
{
__block __typeof__(self)blockSelf = self;
// CL: build a block to be run asynchronously
ApiClientCallback handleResponse = [[^(NSURLResponse *response, NSData *data, NSError *error) {
id results = nil;
// CL: http errors would be caught here.
if (error) {
NSLog(@"[%@ %@] HTTP error: %@", NSStringFromClass([blockSelf class]), NSStringFromSelector(_cmd), error.localizedDescription);
results = error;
}
else {
// CL: parse the JSON
NSError *jsonError = nil;
NSError *apiError = nil;
if (data) {
results = [NSJSONSerialization JSONObjectWithData:data
options:NSJSONReadingMutableContainers
error:&jsonError];
}
else {
results = nil;
}
// CL: json errors would be caught here.
if (jsonError) {
NSLog(@"[%@ %@] JSON error: %@", NSStringFromClass([blockSelf class]), NSStringFromSelector(_cmd), error.localizedDescription);
results = error;
}
// CL: Check for API errors.
else if ([blockSelf checkApiErrorCode:results error:&apiError]) {
//CL: if there's an error make the NSError object the result.
if (apiError) results = apiError;
}
}
// CL: Send result to the completion block of the requesting object
handler(results);
} copy] autorelease];
[NSURLConnection sendAsynchronousRequest:request
queue:self.opQueue
completionHandler:handleResponse];
}