iphone - 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 屏幕将 email-id 和 password 匹配到登录目的。

现在，在某些third 屏幕中，我只需要从已登录用户的 plist 中获取 Height、Weight 即可显示它在标签上。现在如果我将 email-id 和 password 的值存储在 LoginViewController 的字符串中，并在新屏幕中调用它匹配如果匹配则给出 Height,Weight ..如果它正确那么如何从中获取 Height,Weight同一个的plist。

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 文件中获取全部值，然后将此 NSArray 存储到 NSMutableArray 中，并使用其 objectAtIndex 和 获取值valueForKey 属性..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"];

    }

希望这对你有帮助...