等待AFNetworking请求中的完成块完成 [英] Waiting for completion block to complete in an AFNetworking request
问题描述
我正在通过AFNetworking发出JSON请求,然后调用[operation waitUntilFinished]来等待操作以及成功或失败块.但是,这似乎是正确的-就日志消息而言,我得到的是"0","3","1"而不是"0","1","3"
I am making a JSON request with AFNetworking and then call [operation waitUntilFinished] to wait on the operation and the success or failure blocks. But, it seems to fall right though - in terms of the log messages, I get "0", "3", "1" instead of "0", "1", "3"
NSURL *url = [NSURL URLWithString:[NSString stringWithFormat:@"http://google.com"]];
AFHTTPClient *httpClient = [[AFHTTPClient alloc] initWithBaseURL:url];
httpClient.parameterEncoding = AFFormURLParameterEncoding;
NSDictionary *params = [NSDictionary dictionaryWithObjectsAndKeys:@"query", @"q", nil];
NSMutableURLRequest *request = [httpClient requestWithMethod:@"GET" path:[url path] parameters:params];
NSLog(@"0");
AFJSONRequestOperation *operation = [AFJSONRequestOperation JSONRequestOperationWithRequest:request success:^(NSURLRequest *innerRequest, NSHTTPURLResponse *response, id JSON) {
NSLog(@"1");
gotResponse = YES;
} failure:^(NSURLRequest *innerRequest, NSHTTPURLResponse *response, NSError *error, id JSON) {
NSLog(@"2");
gotResponse = YES;
}];
NSLog(@"Starting request");
[operation start];
[operation waitUntilFinished];
NSLog(@"3");
推荐答案
这是通过使用AFNetworking设置请求来完成的,但是先进行同步调用,然后手动处理完成块.很简单. AFNetworking似乎不支持此 https://github.com/AFNetworking/AFNetworking/wiki/AFNetworking-FAQ ,尽管解决方法很简单.
This works by using AFNetworking to set up the requests, but making a synchronous call then handling the completion blocks manually. Very simple. AFNetworking doesn't seem to support this https://github.com/AFNetworking/AFNetworking/wiki/AFNetworking-FAQ, though the work around is simple enough.
#import "SimpleClient.h"
#import "AFHTTPClient.h"
#import "AFJSONRequestOperation.h"
#import "AFJSONUtilities.h"
@implementation SimpleClient
+ (void) makeRequestTo:(NSString *) urlStr
parameters:(NSDictionary *) params
successCallback:(void (^)(id jsonResponse)) successCallback
errorCallback:(void (^)(NSError * error, NSString *errorMsg)) errorCallback {
NSURLResponse *response = nil;
NSError *error = nil;
NSURL *url = [NSURL URLWithString:urlStr];
AFHTTPClient *httpClient = [[AFHTTPClient alloc] initWithBaseURL:url];
httpClient.parameterEncoding = AFFormURLParameterEncoding;
NSMutableURLRequest *request = [httpClient requestWithMethod:@"POST" path:[url path] parameters:params];
NSData *data = [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error];
if(error) {
errorCallback(error, nil);
} else {
id JSON = AFJSONDecode(data, &error);
successCallback(JSON);
}
}
@end
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