iOS学习（三十二）简单的登陆界面保存用户名到home，下次启动并显示出来

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简单的登陆界面保存用户名到home，下次启动并显示出来

- (void)viewDidLoad {    [super viewDidLoad];    // Do any additional setup after loading the view, typically from a nib.    //获取home路径    NSString * path = NSHomeDirectory();    //在home路径下创建save.txt文件    path= [path stringByAppendingPathComponent:@"save.txt"];    NSLog(@"path= %@",path);    //获取home路径下save.txt文件的uname值    NSString * uname = [NSString stringWithContentsOfFile:path encoding:NSUTF8StringEncoding error:nil];    if(uname==nil){        NSLog(@"你没有保存过内容");    }    //输入框获取到的uname的值显示到界面上    self.uname.text = uname;}//点击登陆界面- (IBAction)login:(id)sender {    NSString * str = self.uname.text;    if(str.length>0){        NSString * path = NSHomeDirectory();        path =[path stringByAppendingPathComponent:@"save.txt"];        //保存输入框输入的值到save.txt文件        [str writeToFile:path atomically:YES];    }}

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