设置缓存时间AFNetworking swift 2 [英] Set cache time AFNetworking swift 2
问题描述
我正在使用代码AFNetworking加载数据
I am loading data using code AFNetworking
let manager = AFHTTPRequestOperationManager()
manager.requestSerializer.cachePolicy = NSURLRequestCachePolicy.ReturnCacheDataElseLoad
manager.responseSerializer = AFHTTPResponseSerializer()
let testUrl = "https://www.google.com/maps/vt/pb=!1m8!3m7!1m2!1u2816!2u5888!2m2!1u1536!2u512!3i6!2m3!1e0!2sm!3i333!2m20!1e2!2spsm!4m2!1sgid!2sWejnA6yw2AIgHrbvnAUOAg!4m2!1ssp!2s1!8m11!13m9!2sa!15b1!18m5!2b1!3b0!4b1!5b0!6b0!19b1!19u12!3m2!2sen!5e1105!4e4!11m2!1e2!2b1&authuser=0"
manager.GET(testUrl,
parameters: nil,
success: { (operation: AFHTTPRequestOperation!, responseObject: AnyObject!) in
print("afnetworking GET success1")
},
failure: { (operation: AFHTTPRequestOperation?,error: NSError!) in
print("afnetworking GET 1 - Error: " + error.localizedDescription)
})
当数据在高速缓存中时,它可以从高速缓存中获取数据……很好,
,但是我怎么
1)-设置缓存策略,仅缓存1小时
2)-服务器没有缓存头时
When data is in cache, its giving me data from cache...its fine,
but how can I
1)- Set cache policy, to cache only for 1 hour
2)- When server haven't Caching headers its not caching, cache the data for an hour too for this case also.
推荐答案
对于迅速
宗教,我写了 AFHTTPSessionManager
扩展名,其方法调用了 self.setDataTaskWillCacheResponseBlock:
AFNetworking 3.0
并修改 Cache-Control
响应标头值:
For the guys from Swift
religion, I wrote AFHTTPSessionManager
extension with method which calls self.setDataTaskWillCacheResponseBlock:
from AFNetworking 3.0
and modifies Cache-Control
response header value:
extension AFHTTPSessionManager {
//duration in seconds
func forceCacheResponse(duration:Int) {
self.setDataTaskWillCacheResponseBlock({
(session:NSURLSession, task:NSURLSessionDataTask, proposedResponse:NSCachedURLResponse) -> (NSCachedURLResponse) in
if let response = proposedResponse.response as? NSHTTPURLResponse {
var headers = response.allHeaderFields as! [String:String]
headers["Cache-Control"] = String(format: "max-age=%@", arguments: [duration])
let modifiedResponse = NSHTTPURLResponse(URL: response.URL!, statusCode: response.statusCode, HTTPVersion: "1.1", headerFields: headers)
if (modifiedResponse != nil) {
let cachedResponse = NSCachedURLResponse(response: modifiedResponse!, data: proposedResponse.data, userInfo: proposedResponse.userInfo, storagePolicy: NSURLCacheStoragePolicy.Allowed)
return cachedResponse
}
}
return proposedResponse
})
}
}
现在您已经很简单了:
let manager = AFHTTPSessionManager()
manager.forceCacheResponse(604800)
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