/存儲publickey和sessionID -- writeContent： nil － 僅取出數據， 其他 － 修改原內容并提取
+(NSString *)storeFile:(NSString *)fileName content:(NSString *)writeContent
{
??? NSString *pathDocuments=[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];

??? NSString *createPath=[NSString stringWithFormat:@"%@/%@",pathDocuments,fileName];//用文件名補全路徑
??? NSError *ReadFileError;
??? NSString *readContent ;
??? NSData *data ;
??? if ([[NSFileManager defaultManager] fileExistsAtPath:createPath])//判斷文件是否已存在
??? {
??????? if (nil == writeContent) {
??????????? readContent = [NSString stringWithContentsOfFile:createPath encoding:NSUTF8StringEncoding error:&ReadFileError;];
??????? }else{
??????????? data = [writeContent dataUsingEncoding:NSUTF8StringEncoding];//新文件的初始數據
??????????? [[NSFileManager defaultManager] createFileAtPath:createPath contents:data attributes:nil];//創建文件
??????????? readContent = [NSString stringWithContentsOfFile:createPath encoding:NSUTF8StringEncoding error:&ReadFileError;];???????????
??????? }
??? }
??? else
??? {
??????? if (nil == writeContent) {
??????????? return nil;
??????? }else{
??????????? data = [writeContent dataUsingEncoding:NSUTF8StringEncoding];//新文件的初始數據
??????????? [[NSFileManager defaultManager] createFileAtPath:createPath contents:data attributes:nil];//創建文件
??????????? readContent = [NSString stringWithContentsOfFile:createPath encoding:NSUTF8StringEncoding error:&ReadFileError;];
??????? }
??? }
??? return readContent;
}

+ ( NSArray * )storeArryFile:(NSString *)fileName content:( NSArray *)writeArry
{
??? //步驟
??? //存 ：將 數組放入 字典
??? //?。?從字典取出數組
??? if ( writeArry == nil)//讀取文件
??? {
??????? NSString *storeStr = [FNProRequest storeFile:fileName content:nil];
??????? NSDictionary *dic = (NSDictionary *)[storeStr JSONValue];

??????? NSLog(@"%@", dic);

??????? return (NSArray *)[dic objectForKey:fileName];
??? }
??? else
??? {
??????? NSArray *objectsArry = [[NSArray alloc]initWithObjects:writeArry,nil ];
??????? NSArray *keysArry??? = [[NSArray alloc]initWithObjects:fileName,nil ];
??????? NSDictionary *dic = [[NSDictionary alloc]initWithObjects:objectsArry forKeys:keysArry];
??????? NSString *storeStr = [dic JSONRepresentation];
??????? [self storeFile:fileName content:storeStr];
??????? [objectsArry release];
??????? [keysArry release];
??????? [dic release];
??? }
??? return nil;
}