来自异步任务iOS的AFNetworking返回值
我最近从一个netwiring GET查询中询问了nil值 我有答案了来自异步任务iOS的AFNetworking返回值,ios,objective-c,afnetworking,Ios,Objective C,Afnetworking,我最近从一个netwiring GET查询中询问了nil值 我有答案了 + (void)getRequestFromUrl:(NSString *)requestUrl withCompletion:((void (^)(NSString *result))completion { NSString * completeRequestUrl = [NSString stringWithFormat:@"%@%@", BASE_URL, requestUrl]; AFHTTPRe
+ (void)getRequestFromUrl:(NSString *)requestUrl withCompletion:((void (^)(NSString *result))completion
{
NSString * completeRequestUrl = [NSString stringWithFormat:@"%@%@", BASE_URL, requestUrl];
AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
[manager GET:completeRequestUrl parameters:nil success:^(AFHTTPRequestOperation *operation, id responseObject) {
NSString *results = [NSString stringWithFormat:@"%@", responseObject];
if (completion)
completion(results);
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
NSString *results = [NSString stringWithFormat:@"Error"];
if (completion)
completion(results);
}];
}
[YourClass getRequestFromUrl:@"http://www.example.com" withCompletion:^(NSString *results){
NSLog(@"Results: %@", results);
}
现在我有另一个问题:在我的类中,我有一个名为getAllPlaces的方法
+ (void) getAllPlaces {
NSString * placesUrl = [NSString stringWithFormat: @"/url"];
NSMutableArray *places = [[NSMutableArray alloc] init];
[RestfulActions getRequestFromUrl:cafesUrl withCompletion:^(id placesInJSONFormat) {
NSArray *results = placesInJSONFormat;
for (NSDictionary *tempPlaceDictionary in results) {
Place *place = [[Place alloc] init];
for (NSString *key in tempPlaceDictionary) {
if ([place respondsToSelector:NSSelectorFromString(key)]) {
[place setValue:[tempPlaceDictionary valueForKey:key] forKey:key];
}
}
[places addObject:place];
}
}];
它可以工作,但我想返回非void值(NSArray places)。现在它再次提出了异步任务的问题。我该怎么办?
我想从另一个类访问NSArray*places=[MyClass getAllPlaces]
我希望得到一个正确的答案。泰克斯,阿泰姆 不能从该块返回值,因为它是异步的,并且在其他任务进行时继续运行
正确的处理方法是从块内调用处理此数据的方法并将其传递给数组。您应该尝试实现如下方法:
+ (void) getTimeline:(NSString*)val success:(void (^)(id))success failure:(void (^)(NSError *))failure;
[MyClass getTimeline:nil
success:^(id result) {} failure:^(NSError *error) {}
然后像这样使用它:
+ (void) getTimeline:(NSString*)val success:(void (^)(id))success failure:(void (^)(NSError *))failure;
[MyClass getTimeline:nil
success:^(id result) {} failure:^(NSError *error) {}
成功块将有返回值(如果有)
还有什么吗?:) 非常好,thx:)很有效。但我想把NSArray对象弄到成功块外,我该怎么办?嘿!很抱歉迟了回复!好了,它对我来说非常好:)成功:^(AFHTTPRequestOperation*op,id-response){if(成功){NSArray*arr=[self-getJSON:response];}}}失败:^(AFHTTPRequestOperation*op,NSError*error){if(失败){failure(error);}};如果你想在其他方法中使用这个数组,你只需要声明一个全局值,然后让它指向success块中的success数组。。。然后,您可以在任何地方使用它:)