ios笔记一 追加数据

//追加数据

NSString *homePat = NSHomeDirectory();
NSString *sourcePath = [homePath stringByAppedingPathComponent:@"testfile.ext"];
NSFileHandle *fileHandle = [NSFileHandle fileHandleForUpdatingAtPath:sourcePath];
//将结点跳转到文件末尾
[fileHandle seekToEndOfFile];
NSString *str = @"追加的数据";
NSData *stringData = [str dataUsingEncoding:NSUTF8StringEncoding];
//追加写入的数据
[fileHandle writeData:stringData];
[fileHandle closeFile];