如何从Label中的pList中获取数据

Question

我有一个 RegistrationController 屏幕来存储 email-id ,password,DOB,Height,Weight 和 logininController 屏幕来匹配 email-id 和 password 登录目的.

现在，在某些 third 屏幕中，我必须仅从登录用户的 plist 中获取 Height,Weight 以将其显示在标签上。现在如果我存储 email-id 的值和password in from LoginViewController in string 并在新屏幕中调用它以匹配如果匹配然后给出Height,Weight ..如果它更正则如何从plist中获取Height,Weight同一个。

如何从存储的 plist 中获取字符串？

这是我的代码：

-(NSArray*)readFromPlist
 {
   NSArray *documentPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,
  NSUserDomainMask, YES); 
  NSString *documentsDirectory = [documentPaths objectAtIndex:0];
 NSString *documentPlistPath = [documentsDirectory stringByAppendingPathComponent:@"XYZ.plist"];

   NSDictionary *dict = [NSDictionary dictionaryWithContentsOfFile:documentPlistPath];

   NSArray *valueArray = [dict objectForKey:@"title"];

   return valueArray;

 }



- (void)authenticateCredentials {
    NSMutableArray *plistArray = [NSMutableArray arrayWithArray:[self readFromPlist]];

    for (int i = 0; i< [plistArray count]; i++)
    {
        id object = [plistArray objectAtIndex:i];

        if ([object isKindOfClass:[NSDictionary class]]) {
            NSDictionary *objDict = (NSDictionary *)object;

            if ([[objDict objectForKey:@"pass"] isEqualToString:emailTextFeild.text] && [[objDict objectForKey:@"title"] isEqualToString:passwordTextFeild.text])
            {
                NSLog(@"Correct credentials");
                return;
            }
            NSLog(@"INCorrect credentials");
        } else {
             NSLog(@"Error! Not a dictionary");
        }
    }
}

Answer 1

首先从您的 plist 文件中获取整个值，然后将此 NSArray 存储到 NSMutableArray 并使用其 objectAtIndex 和 valueForKey 属性获取值..请参阅下面的整个示例..

更新：

NSString* plistPath = [[NSBundle mainBundle] pathForResource:@"yourFileName" ofType:@"plist"];
NSArray *contentArray = [NSArray arrayWithContentsOfFile:plistPath];
NSMutableArray *yourArray = [[NSMutableArray alloc] initWithArray:contentArray];

    for (int i = 0; i< [yourArray count]; i++)
    {
        id object = [yourArray objectAtIndex:i];

        if ([object isKindOfClass:[NSDictionary class]]) {
            NSDictionary *objDict = (NSDictionary *)object;

           yourLableWeight.text = [[objDict objectForKey:@"Weight"];// set index with your requirement
         yourLableHeight.text = [[objDict objectForKey:@"Height"];

    }

希望对您有所帮助...

Answer 2

当您在登录屏幕上输入凭据以检查凭据何时与获取的 plist 匹配时，然后将该 plist 传递给下一个控制器。做这样的事情

UserViewController *controller = [[UserViewController alloc] initWithNibName:@"UserViewController" bundel:nil];
[controller setUserDictionary:yourPlistDictionary];
[self.navigationController pushViewController:controller animated:YES];
[controller release];

在 UserViewController 中你会有一个 NSDictionary 实例来存储要显示的数据，希望对你有所帮助