如何使用输入的文本字段填充 NSMutableArray

Posted 2023-03-04

【中文标题】如何使用输入的文本字段填充 NSMutableArray

【英文标题】：How to populate an NSMutableArray with entered Text Field

【发布时间】：2012-02-15 14:12:26

【问题描述】：

我遇到的问题是，在我将文本输入文本字段后，我必须离开页面并继续选择某些选项。然后，当（在第二页上）您单击完成时，您将返回第一页。在第一页上，我想创建一个 tablesubview，我可以在其中存储第一页文本字段和第二页选项中的信息both。下面是方法代码...

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


@implementation EnteringCoursesViewController

@synthesize classField;
@synthesize indicatedClass;
@synthesize labelClassTitle;
@synthesize selectRotationController;
@synthesize classesEntered;


- (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];


- (void)didReceiveMemoryWarning 
    // Releases the view if it doesn't have a superview.
    [super didReceiveMemoryWarning];

    // Release any cached data, images, etc. that aren't in use.


- (void)viewDidLoad 
    NSMutableArray *array = [[NSMutableArray alloc]
                        //help here!//
    self.classesEntered = array;
    [array release]; 

    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];
    [classesEntered release];
    [super dealloc];



@end

【参考方案1】：

如果我正确理解您的问题，那么以下方法将是不错的方法：

在第一个控制器中，创建一个模型对象来保存两个输入页面的所有信息。在推送第二个控制器之前，将其属性设置为模型对象。然后第二个控制器用用户信息填充模型对象。

模型对象可以是你自己的一个类，它可以像 NSMutableArray 一样简单，甚至可以是第一个视图控制器本身。

【讨论】：

我想使用 NSMutableArray 但我不知道如何从第二个控制器访问信息...？

将属性添加到第二个控制器并使用 NSMutableArray 进行设置。类似于“@property (nonatomic, assign) NSMutableArray *data;”会做。然后，就在你推送第二个视图控制器之前，用“secondViewController.data = array;”设置它