How to fetch data from pList in Label

问题:

I have a RegistrationController screen to store email-id ,password,DOB,Height,Weight and logininController screen to match email-id and password to log-in purpose.

Now, In some third screen I have to fetch only the Height,Weight from the plist of the logged-in user to display it on the label.now if I Store the values of email-id and password in from LoginViewController in string and call it in the new screen to match if matches then gives Height,Weight ..if it corrects then how to fetch Height,Weight from the plist of the same one.

How can I fetch from the stored plist in a string?

Here is my code:

-(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");
        }
    }
}

回答1:

First get whole value from your plist file after that store this NSArray into NSMutableArray and get the value with its objectAtIndex and valueForKey property..see whole example bellow..

UPDATE :

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"];

    }

hope this help you...

回答2:

When you enter credentials on login screen to check when it match the credentials with the fetched plist then pass that plist to the next controller. Do something like this

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

in UserViewController you would have a NSDictionary instance to store the data to show, hope that will help you