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标题: 浅析iPhone平台下Facebook开发 [打印本页]

作者: 奔跑的小兔 时间: 2012-8-6 16:16
标题: 浅析iPhone平台下Facebook开发
下面简单总结下具体的开发流程
开发者最关心的应该是接口.

Facebook就是iPhone client 和后台通信的接口。其实所有的流程都包含在interface 的定义里面。
大致流程应该是：
Step 1: Login In

Step 2: Communication ( send request and handle resp*****e )

Step 3: Login Out
Step 1: Login In
首先，创建Facebook instance
Facebook* facebook = [[Facebook alloc] init];
在UI上，弹出

Button 实际会调用
- (void) authorizeNSString*) application_id

permissi*****NSArray*) permissi*****

delegateid) delegate;
参数说明：
application_id

创建自己的app id http://www.facebook.com/developers/createapp.php
permissi*****
比如

_permissi***** = [[NSArrayarrayWithObjects:

@"read_stream", @"offline_access",nil] retain];
delegate

负责login ,log out etc
/*

*Your application should implement this delegate

*/

@protocol FBSessionDelegate
@optional
/**

* Called when the dialog successful log in the user

*/

- (void)fbDidLogin;
/**

* Called when the user dismiss the dialog without login

*/

- (void)fbDidNotLogin

BOOL)cancelled;
/**

* Called when the user is logged out

*/

- (void)fbDidLogout;
@end
Step 2: 和facebook 后台通信
让我们先来看看通信的api
- (void) requestWithParams

NSMutableDictionary *) params

andDelegate

id ) delegate;
- (void) requestWithMethodName

NSString *) methodName

andParams

NSMutableDictionary *) params

andHttpMethod

NSString *) httpMethod

andDelegate

id ) delegate;
- (void) requestWithGraphPath

NSString *) graphPath

andDelegate

id ) delegate;
- (void) requestWithGraphPath

NSString *)graphPath

andParams:(NSMutableDictionary *) params

andDelegate:(id ) delegate;
- (void) requestWithGraphPath:(NSString *)graphPath

andParams:(NSMutableDictionary *) params

andHttpMethod:(NSString *) httpMethod

andDelegate:(id ) delegate;
实际上这5个API 可以分为两个大类：
1, Old REST API
- (void) requestWithParams:(NSMutableDictionary *) params

andDelegate:(id ) delegate;
- (void) requestWithMethodName:(NSString *) methodName

andParams:(NSMutableDictionary *) params

andHttpMethod:(NSString *) httpMethod

andDelegate:(id ) delegate;
例子：
NSMutableDictionary* params = [NSMutableDictionary dictionaryWithObjectsAndKeys: @"4", @"uids", @"name", @"fields", nil]; [facebook requestWithMethodName: @"users.getInfo" andParams: params andHttpMethod: @"GET" andDelegate: self];
2, Graph API
- (void) requestWithGraphPath:(NSString *) graphPath

andDelegate:(id ) delegate;
- (void) requestWithGraphPath:(NSString *)graphPath

andParams:(NSMutableDictionary *) params

andDelegate:(id ) delegate;
- (void) requestWithGraphPath:(NSString *)graphPath

andParams:(NSMutableDictionary *) params

andHttpMethod:(NSString *) httpMethod

andDelegate:(id ) delegate;

比如
[facebook requestWithGraphPath"me" andDelegate:self]; // get information about the currently logged in user [facebook requestWithGraphPath"platform/posts" andDelegate:self]; // get the posts made by the "platform" page

[facebook requestWithGraphPath"me/friends" andDelegate:self]; // get the logged-in user's friends

还有一类很重要的API

Displaying Dialogs
- (void) dialog:(NSString *) action

andDelegate:(id) delegate;
- (void) dialog:(NSString *) action

andParams:(NSMutableDictionary *) params

andDelegate:(id ) delegate;
比如用户在 wall 上发消息
NSMutableDictionary* params = [NSMutableDictionary dictionaryWithObjectsAndKeys: apiKey, @"api_key", nil]; [facebook dialog

"stream.publish" andParams:params andDelegate:self];
Step 3 : Log out
这一切似乎很容易啊！

具体可以参考例子 DemoApp

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