-(void)createFiel{
//创建文件管理器
NSFileManager *fileManager = [NSFileManager defaultManager];
//获取document路径,括号中属性为当前应用程序独享
NSArray *directoryPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentDirectory = [directoryPaths objectAtIndex:0];
//定义记录文件全名以及路径的字符串filePath
filePath = [documentDirectory stringByAppendingPathComponent:@"history.txt"];
//查找文件，如果不存在，就创建一个文件
if (![fileManager fileExistsAtPath:filePath]) {
[fileManager createFileAtPath:filePath contents:nil attributes:nil];
}
}
//读写本地历史记录 isgetData == yes 获取数据, 写入数据
-(void)getHistoryData:(BOOL)isGetData {
if (isGetData == NO) {
// NSString *str = [NSString stringWithContentsOfFile:filePath usedEncoding:nil error:nil];
NSString *historyStr = [ historyArry componentsJoinedByString:@","];
[historyStr writeToFile:filePath atomically:YES
encoding:NSUTF8StringEncoding error:nil];
//通过将writeToFile:atomically:encoding:error:方法发送给字符串对象完成字符串存储到文件内的功能
}else{
NSString *str = [NSString stringWithContentsOfFile:filePath usedEncoding:nil error:nil];
//[historyArry removeAllObjects];
//[historyArry addObject:@""];
if(str.length!=0){
//[historyArry addObjectsFromArray:[ str componentsSeparatedByString:@","]];
}
NSLog(@"%@",str);
}
}
