在objective-C中的另一个Viewcontroller上的texView上给出一个NSMutableArray？

Question

当我按下这个 viewContoller 上的按钮时，我尝试将一个 viewController 上的文本字段中的数字保存在 NSMutableArray 中。 （现在正在工作） 然后我希望在 secondViewController 上的 textview 上给出数字，但这不起作用。当我想在第一个 Viewcontroller 上给出数组时，它工作正常。 我也不能用 SecondviewController 上的按钮擦除 NSMutableArray。

SecondviewController 与 viewController 具有相同的类。

谁能告诉我如何在 seconviewcontroller 上给出一个数组？

你好， 目前我有这个：

//ViewController.h:

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController {
NSMutableArray *textViewArray;
}
@property (strong, nonatomic) IBOutlet UITextField *textLable2;
@property (strong, nonatomic) IBOutlet UITextField *textLable1;

- (IBAction)setArrayWithCurrentNumber:(id)sender;
- (IBAction)returnToTextfield:(id)sender;

@end

//这个.m文件：

#import "ViewController.h"

@implementation ViewController
@synthesize textLable2;
@synthesize textLable1;


- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Release any cached data, images, etc that aren't in use.
}

#pragma mark - View lifecycle

- (void)viewDidLoad
{
    [super viewDidLoad];

    textViewArray = [[NSMutableArray alloc]init];
    // Do any additional setup after loading the view, typically from a nib.
}

- (void)viewDidUnload
{
    [self setTextLable2:nil];
    [self setTextLable1:nil];
    [super viewDidUnload];
    // Release any retained subviews of the main view.
    // e.g. self.myOutlet = nil;
}

- (void)viewWillAppear:(BOOL)animated
{
    [super viewWillAppear:animated];
}

- (void)viewDidAppear:(BOOL)animated
{
    [super viewDidAppear:animated];
}

- (void)viewWillDisappear:(BOOL)animated
{
    [super viewWillDisappear:animated];
}

- (void)viewDidDisappear:(BOOL)animated
{
    [super viewDidDisappear:animated];
}

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
    // Return YES for supported orientations
    return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown);
}

- (IBAction)setArrayWithCurrentNumber:(id)sender 
{
    NSString *string1 = self.textLable1.text;
    [textViewArray addObject:string1];
    NSMutableArray *array = [NSMutableArray arrayWithArray:textViewArray];
    NSString *string2 = [array componentsJoinedByString:@" "];

    self.textLable2.text = [NSString stringWithString:string2];
    NSLog(@"%@",textViewArray);
}

- (IBAction)returnToTextfield:(id)sender 
{
    [textLable1 resignFirstResponder];
    [textLable2 resignFirstResponder];
}
@end

Answer 1

如果您从第一个视图控制器调用第二个视图控制器，您可以在第二个视图控制器上设置一个属性来保存 NSMutableArray 或将其发送到初始化程序。

类似：

- (id)initWithArray:(NSMutableArray *)array {
    if (self = [super init]) {
        myArray = [array copy];
    }
    return self;
}

假设您的第二个视图控制器已声明 NSMutableArray * myArray;

编辑：在此处添加更多代码...

// I'll assume you use some kind of UINavigationController to show your content
- (void)showSecondViewController {
    SecondViewController * vc = [[[SecondViewController alloc] initWithArray:yourMutableArray] autorelease];
    [self.navigationController pushViewController:vc];
}