AFネットワーキングは素晴らしいです。ブロックと GCD を使用します。かなり簡単に呼び出すことができる NetworkClient クラスを作成しました。自由に使用またはカスタマイズしてください。ただし、私は何も保証しません :)
API キーは、必要に応じて削除できるものです。すべてのネットワーク リクエストにセキュリティを追加する方法として追加しました。私の Web サービスは、何かを返す前に、渡された APIKey の有効性をチェックします。
また、物事をどのように行うかについては、かなり柔軟に対応できます。同期または非同期のリクエスト、失敗時にユーザーに警告しないリクエストなどを行うことができます。
基本的な使用例:
NSDictionary *params = [NSDictionary dictionaryWithObjectsAndKeys:
@"GetAllParkingLots", @"Command",
nil];
[NetworkClient processURLRequestWithURL:nil andParams:params block:^(id obj) {
// I check to see what kind of object is passed back, in this case I was expecting an Array
if ([obj isKindOfClass:[NSArray class]]) {
// Do something with the Array
[self processNetworkRequestWithArray:(NSArray *)obj];
}
}];
NetworkClient.h:
//
// NetworkClient.h
//
// Created by LJ Wilson on 2/18/12.
// Copyright (c) 2012 LJ Wilson All rights reserved.
//
#import <Foundation/Foundation.h>
extern NSString * const APIKey;
@interface NetworkClient : NSObject
+(void)processURLRequestWithURL:(NSString *)url
andParams:(NSDictionary *)params
block:(void (^)(id obj))block;
+(void)processURLRequestWithURL:(NSString *)url
andParams:(NSDictionary *)params
syncRequest:(BOOL)syncRequest
block:(void (^)(id obj))block;
+(void)processURLRequestWithURL:(NSString *)url
andParams:(NSDictionary *)params
syncRequest:(BOOL)syncRequest
alertUserOnFailure:(BOOL)alertUserOnFailure
block:(void (^)(id obj))block;
+(void)handleNetworkErrorWithError:(NSError *)error;
+(void)handleNoAccessWithReason:(NSString *)reason;
@end
NetworkClient.m:
//
// NetworkClient.m
//
// Created by LJ Wilson on 2/18/12.
// Copyright (c) 2012 LJ Wilson All rights reserved.
//
#import "NetworkClient.h"
#import "AFHTTPClient.h"
#import "AFHTTPRequestOperation.h"
#import "SBJson.h"
#warning Set APIKey or set to nil
NSString * const APIKey = @"YourAPIKEYGoesHere";
@implementation NetworkClient
+(void)processURLRequestWithURL:(NSString *)url
andParams:(NSDictionary *)params
block:(void (^)(id obj))block {
[self processURLRequestWithURL:url andParams:params syncRequest:NO alertUserOnFailure:NO block:^(id obj) {
block(obj);
}];
}
+(void)processURLRequestWithURL:(NSString *)url
andParams:(NSDictionary *)params
syncRequest:(BOOL)syncRequest
block:(void (^)(id obj))block {
[self processURLRequestWithURL:url andParams:params syncRequest:syncRequest alertUserOnFailure:NO block:^(id obj) {
block(obj);
}];
}
+(void)processURLRequestWithURL:(NSString *)url
andParams:(NSDictionary *)params
syncRequest:(BOOL)syncRequest
alertUserOnFailure:(BOOL)alertUserOnFailure
block:(void (^)(id obj))block {
#warning Fix default url
// Default url goes here, pass in a nil to use it
if (url == nil) {
url = @"YourDefaultURLGoesHere";
}
NSMutableDictionary *dict = [[NSMutableDictionary alloc] initWithDictionary:params];
[dict setValue:APIKey forKey:@"APIKey"];
NSDictionary *newParams = [[NSDictionary alloc] initWithDictionary:dict];
NSURL *requestURL;
AFHTTPClient *httpClient = [[AFHTTPClient alloc] initWithBaseURL:requestURL];
NSMutableURLRequest *theRequest = [httpClient requestWithMethod:@"POST" path:url parameters:newParams];
__block NSString *responseString = @"";
AFHTTPRequestOperation *_operation = [[AFHTTPRequestOperation alloc] initWithRequest:theRequest];
__weak AFHTTPRequestOperation *operation = _operation;
[operation setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject) {
responseString = [operation responseString];
id retObj = [responseString JSONValue];
// Check for invalid response (No Access)
if ([retObj isKindOfClass:[NSDictionary class]]) {
if ([[(NSDictionary *)retObj valueForKey:@"Message"] isEqualToString:@"No Access"]) {
block(nil);
[self handleNoAccessWithReason:[(NSDictionary *)retObj valueForKey:@"Reason"]];
}
} else if ([retObj isKindOfClass:[NSArray class]]) {
if ([(NSArray *)retObj count] > 0) {
NSDictionary *dict = [(NSArray *)retObj objectAtIndex:0];
if ([[dict valueForKey:@"Message"] isEqualToString:@"No Access"]) {
block(nil);
[self handleNoAccessWithReason:[(NSDictionary *)retObj valueForKey:@"Reason"]];
}
}
}
block(retObj);
}
failure:^(AFHTTPRequestOperation *operation, NSError *error) {
NSLog(@"Failed with error = %@", [NSString stringWithFormat:@"[Error]:%@",error]);
block(nil);
if (alertUserOnFailure) {
// Let the user know something went wrong
[self handleNetworkErrorWithError:operation.error];
}
}];
[operation start];
if (syncRequest) {
// Process the request syncronously
[operation waitUntilFinished];
}
}
+(void)handleNetworkErrorWithError:(NSError *)error {
NSString *errorString = [NSString stringWithFormat:@"[Error]:%@",error];
// Standard UIAlert Syntax
UIAlertView *myAlert = [[UIAlertView alloc]
initWithTitle:@"Connection Error"
message:errorString
delegate:nil
cancelButtonTitle:@"OK"
otherButtonTitles:nil, nil];
[myAlert show];
}
+(void)handleNoAccessWithReason:(NSString *)reason {
// Standard UIAlert Syntax
UIAlertView *myAlert = [[UIAlertView alloc]
initWithTitle:@"No Access"
message:reason
delegate:nil
cancelButtonTitle:@"OK"
otherButtonTitles:nil, nil];
[myAlert show];
}
@end