你如何引用一個文本字段並將其輸入到一個可變數組中

所以我需要在保存到nsmutablearray的文本字段中輸入任何內容（這必須發生多次！每次必須另存爲另一個對象）。但是無論我明確表達什麼都行不通，因爲它說「文本」不在結構或聯盟中。繼承人我的代碼。感謝您的任何意見！你如何引用一個文本字段並將其輸入到一個可變數組中

問題出在enteredClassText方法中。

#import "EnteringCoursesViewController.h" 
#import "SelectRotationController.h" 


@implementation EnteringCoursesViewController 

@synthesize classField; 
@synthesize indicatedClass; 
@synthesize labelClassTitle; 
@synthesize selectRotationController; 
@synthesize classesEnteredTable; 

- (IBAction)chooseType { 
    UIActionSheet *typeSheet = [[UIActionSheet alloc] 
           initWithTitle:@"Class types" 
           delegate:self 
           cancelButtonTitle:nil 
           destructiveButtonTitle:nil 
           otherButtonTitles:@"Core Class", @"Elective", nil]; 
    [typeSheet showInView:self.view]; 
    [typeSheet release]; 
} 

- (void)actionSheet:(UIActionSheet *)typeSheet clickedButtonAtIndex:(NSInteger)buttonIndex 
{ 
    if (buttonIndex == 0) { 
     self.indicatedClass = classField.text; 
     NSString *indicatedString = indicatedClass; 
     NSString *greeting = [[NSString alloc] 
           initWithFormat:@"%@ meets 6 times per rotation", indicatedString]; 
     labelClassTitle.text = greeting; 
     labelClassTitle.hidden = NO; 
     [greeting release]; 
     [indicatedClass release]; 
    } 
    else if (buttonIndex == 1) { 
     self.indicatedClass = classField.text; 
     NSString *indicatedString = indicatedClass; 
     NSString *greeting = [[NSString alloc] 
           initWithFormat:@"%@ meets 3 times per rotation", indicatedString]; 
     labelClassTitle.text = greeting; 
     labelClassTitle.hidden = NO; 
     [greeting release]; 
     [indicatedClass release]; 
    } 

} 

- (IBAction)chooseFirstMeeting:(id)sender {  
    SelectRotationController *selectView = [[SelectRotationController alloc] 
               initWithNibName:@"SelectRotationController" 
               bundle:[NSBundle mainBundle]]; 
    [selectView.navigationItem setTitle:@"First Period Day Choose"]; 

    [self.navigationController pushViewController:self.selectRotationController animated:YES]; 
    self.selectRotationController = selectView; 
    [selectView release]; 
} 

- (IBAction)enteredClassText:(id)sender { 
     NSMutableArray *classesEntered = [NSMutableArray arrayWithObject:sender.text]; 
     [classesEntered = [NSMutableArray alloc] init]; 
     [classesEntered release]; 

} 

- (void)didReceiveMemoryWarning { 
    [super didReceiveMemoryWarning]; 

} 

- (void)viewDidLoad { 
    self.navigationItem.hidesBackButton = YES; 
    [super viewDidLoad]; 

} 

- (void)viewDidUnload { 
    [super viewDidUnload]; 
    // Release any retained subviews of the main view. 
    // e.g. self.myOutlet = nil; 
} 


- (void)dealloc { 
    [classField release]; 
    [labelClassTitle release]; 
    [indicatedClass release]; 
    [selectRotationController release]; 
    [classesEnteredTable release]; 
    [super dealloc]; 
} 


@end

來源

2012-02-29 mentorship

當你按下按鈕，你應該輸入的內容，將其轉換爲字符串，並保存字符串數組。這應該相當容易完成。下面是一些示例代碼：

@interface 

NSMutableArray *theArray;

@implementation 

- (BOOL)textFieldShouldReturn:(UITextField *)textField { 

NSString *theStringToAdd = textField.text; 
[theArray addObject:theStringToAdd]; 

}

要注意的是我還沒有測試此代碼！

來源

2012-02-29 18:04:43 wizH

不應該是：'[theArray addObject：theStringToAdd];'？ – 2012-02-29 19:55:55

對不起，代碼已被編輯！ – wizH 2012-02-29 19:59:20

如果你想關閉鍵盤，不要忘記[textField resignFirstResponder]。 – 2012-02-29 20:25:21

的問題是在這裏：

- (IBAction)enteredClassText:(id)sender { 
    NSMutableArray *classesEntered = [NSMutableArray arrayWithObject:sender.text]; 
    [classesEntered = [NSMutableArray alloc] init]; 
    [classesEntered release];

}

要解決這個問題，嘗試引用它作爲

[(UITextField*)sender text]

所以，你最終的代碼應該是這樣的：

- (IBAction)enteredClassText:(id)sender { 
    NSMutableArray *classesEntered = [NSMutableArray arrayWithObject:[(UITextField*)sender text]]; 
    [classesEntered = [NSMutableArray alloc] init]; 
    [classesEntered release];

}

這告訴程序假定發件人將是一個UITextView。

來源

2012-03-06 01:16:48 WolfLink

你如何引用一個文本字段並將其輸入到一個可變數組中

回答

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