如何从标签中的pList中获取数据

我有一个RegistrationController屏幕来存储email-id ， password ， DOB ， Height ， Weight和logininController屏幕以匹配email-id和passwordlogin目的。

现在，在third屏幕中，我只需要从login用户的plist中获取Height ，权Weight ，以便将其显示在label上。现在，如果将Login email-id Controller中的email-id和password的值存储在string和call它在新的屏幕上如果匹配则给出Height ， Weight如果它更正则从同一个plist取得Height ， Weight 。

我怎样才能从存储的plist中取出一个string？

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plist文件中获得整个值，然后将这个NSArray存储到NSMutableArray并使用它的objectAtIndex和valueForKey属性获取值。

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"]; } 

希望这可以帮助你…

Answer 2

当您在login屏幕上input凭证以检查何时与获取的plist匹配时，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，您将有一个NSDictionary实例来存储要显示的数据，希望对您有所帮助