Question

我正在关注给定的示例代码

AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
[manager GET:@"http://example.com/resources.json" parameters:nil success:^(AFHTTPRequestOperation *operation, id responseObject) {
    NSLog(@"JSON: %@", responseObject);
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
    NSLog(@"Error: %@", error);
}];

要更改超时和缓存策略，我已经“入侵”了库并创建了

- (AFHTTPRequestOperation *)GET:(NSString *)URLString
                     parameters:(NSDictionary *)parameters
                          timeoutInterval:(NSTimeInterval)timeoutInterval
                    cachePolicy:(NSURLRequestCachePolicy)cachePolicy
                        success:(void (^)(AFHTTPRequestOperation *operation, id responseObject))success
                        failure:(void (^)(AFHTTPRequestOperation *operation, NSError *error))failure
{
    NSMutableURLRequest *request = [self.requestSerializer requestWithMethod:@"GET" URLString:[[NSURL URLWithString:URLString relativeToURL:self.baseURL] absoluteString] parameters:parameters];
    [request setTimeoutInterval:timeoutInterval];
    [request setCachePolicy:cachePolicy];
    AFHTTPRequestOperation *operation = [self HTTPRequestOperationWithRequest:request success:success failure:failure];
    [self.operationQueue addOperation:operation];

    return operation;
}

这样做有干净的方法吗？

Answer 1

我有点懒于分类或子类。您可以直接访问经理的请求序列化程序：

AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
manager.requestSerializer.timeoutInterval = INTERNET_TIMEOUT;
manager.requestSerializer.cachePolicy = NSURLRequestReloadIgnoringLocalAndRemoteCacheData;

Answer 2

最好是创建一个子类

（您也可以采用相同的方式添加缓存策略）

<强> TimeoutAFHTTPRequestSerializer.h

#import "AFURLRequestSerialization.h"

@interface TimeoutAFHTTPRequestSerializer : AFHTTPRequestSerializer

@property (nonatomic, assign) NSTimeInterval timeout;

- (id)initWithTimeout:(NSTimeInterval)timeout;

@end

<强> TimeoutAFHTTPRequestSerializer.m

#import "TimeoutAFHTTPRequestSerializer.h"

@implementation TimeoutAFHTTPRequestSerializer

- (id)initWithTimeout:(NSTimeInterval)timeout {

    self = [super init];
    if (self) {
        self.timeout = timeout;
    }
    return self;

}

- (NSMutableURLRequest *)requestWithMethod:(NSString *)method
                                 URLString:(NSString *)URLString
                                parameters:(NSDictionary *)parameters
                                     error:(NSError *__autoreleasing *)error
{
    NSMutableURLRequest *request = [super requestWithMethod:method URLString:URLString parameters:parameters error:error];

    if (self.timeout > 0) {
        [request setTimeoutInterval:self.timeout];
    }
    return request;
}

@end

使用

self.requestOperationManager.requestSerializer = [[TimeoutAFHTTPRequestSerializer alloc] initWithTimeout:30];

Answer 3

您还可以创建一个类别AFHTTPRequestOperationManager + timeout来添加此方法，而无需子类化AFHTTPRequestOperationManager。

Answer 4

以更清洁的方式来查看方法1 ：https://stackoverflow.com/a/21238330/435040

不同之处在于我正在使用子类化而且我没有修补AFNetworking的代码。

我忘了提一件事。在那个答案中，我只是改变了超时间隔，但添加一些其他缓存策略只是另外一行代码。

Answer 5

尝试类似：

NSURLRequest *request = [NSURLRequest requestWithURL:url cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:kRequestTimout];

其中kRequestTimout是您想要的超时时长

然后构建您的序列化请求：

NSURLRequest *serializedRequest = [self.requestOperationManager.requestSerializer requestBySerializingRequest:request withParameters:parameters error:&error];

创造＆amp;添加您的请求操作：

AFHTTPRequestOperation *operation = [[AFHTTPRequestOperation alloc] initWithRequest:serializedRequest];
[operation setCompletionBlockWithSuccess:successBlock failure:failureBlock];
[self.requestOperationManager.operationQueue addOperation:operation];

如何在AFNetworking 2.0中设置请求超时和缓存策略？

5 个答案: