ios 如何在 AFNetworking 2.0 中设置请求超时和缓存策略？
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How do I set a request timeout and cache policy in AFNetworking 2.0?
提问by joao
I'm following the given example code
我正在遵循给定的示例代码
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);
}];
To change the timeout and cache policy I 'hacked' the library and created
为了更改超时和缓存策略，我“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;
}
Is there a clean way of doing this?
有没有干净的方法来做到这一点？
回答by LordParsley
I'm a bit lazy to categorize or subclass. You can access the manager's request serializer directly:
我有点懒于分类或子类化。您可以直接访问管理器的请求序列化程序：
AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
manager.requestSerializer.timeoutInterval = INTERNET_TIMEOUT;
manager.requestSerializer.cachePolicy = NSURLRequestReloadIgnoringLocalAndRemoteCacheData;
回答by Peter Lapisu
The best is to create a subclass
最好是创建一个子类
(you can also the same way add cache policy)
（你也可以用同样的方式添加缓存策略）
TimeoutAFHTTPRequestSerializer.h
超时AFHTTPRequestSerializer.h
#import "AFURLRequestSerialization.h"
@interface TimeoutAFHTTPRequestSerializer : AFHTTPRequestSerializer
@property (nonatomic, assign) NSTimeInterval timeout;
- (id)initWithTimeout:(NSTimeInterval)timeout;
@end
TimeoutAFHTTPRequestSerializer.m
超时AFHTTPRequestSerializer.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
Use
用
self.requestOperationManager.requestSerializer = [[TimeoutAFHTTPRequestSerializer alloc] initWithTimeout:30];
回答by Pierre Marty
You can also create a category AFHTTPRequestOperationManager+timeout to add this method without having to subclass AFHTTPRequestOperationManager.
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。
回答by arturgrigor
Take a look at Method 1for a cleaner wayto do it: https://stackoverflow.com/a/21238330/435040
看一下方法 1以获得更清晰的方法：https: //stackoverflow.com/a/21238330/435040
The difference is that I'm using subclassing and I'm not patching AFNetworking's code.
不同之处在于我使用的是子类化，而不是修补 AFNetworking 的代码。
One thing that I forgot to mention. In that answer I'm only changing the timeout interval, but adding some other caching policy is just 1 more line of code.
一件事我忘了提。在那个答案中，我只是更改了超时间隔，但添加一些其他缓存策略只是多 1 行代码。
回答by user3465357
Try something like :
尝试类似：
NSURLRequest *request = [NSURLRequest requestWithURL:url cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:kRequestTimout];
where kRequestTimoutis the timeout duration you want
kRequestTimout你想要的超时持续时间在哪里
Then build your serialized request :
然后构建您的序列化请求：
NSURLRequest *serializedRequest = [self.requestOperationManager.requestSerializer requestBySerializingRequest:request withParameters:parameters error:&error];
And create & add your request operation :
并创建和添加您的请求操作：
AFHTTPRequestOperation *operation = [[AFHTTPRequestOperation alloc] initWithRequest:serializedRequest];
[operation setCompletionBlockWithSuccess:successBlock failure:failureBlock];
[self.requestOperationManager.operationQueue addOperation:operation];
