IOS 沙盒两种数据读取方式&NSUserDefaults读取方式

沙盒数据读取写入

NSString *doc=[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES)lastObject];

NSString *path=[doc stringByAppendingPathComponent:@"account.archive”];

1.获取沙盒路径

2.如果是数组字典的话

[responseObject writeToFile:path atomically:YES];

NSDictionary *account=[NSDictionary dictionaryWithContentsOfFile:path];

3.如果是自定义Model的话

[NSKeyedArchiver archiveRootObject:account toFile:path];

AccountModel *account1=[NSKeyedUnarchiver unarchiveObjectWithFile:path];

NSUserDefaults

NSString *key=@"CFBundleVersion";

写入：

[[NSUserDefaults standardUserDefaults] setObject:currentVersion forKey:key];

 // 这个不可省 立即执行

 [[NSUserDefaults standardUserDefaults] synchronize];

读取：

NSString *lastVersion=[[NSUserDefaults standardUserDefaults] objectForKey:key];

 // 从info.plist中获取版本号

NSString *currentVersion=[NSBundle mainBundle].infoDictionary[key];

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