未将对象添加到NSMutableArray目标-C [英] Objects not being added to NSMutableArray Objective -C

问题描述

我试图将对象简单地添加到可变数组中，但是它们不会插入.我没有收到错误或任何东西，也无法弄清楚到底是怎么回事.

I'm trying to simply add objects to a mutable array but they WILL NOT insert. I'm not getting errors or anything and I can't figure out whats going on.

在主委托文件中，我将数组分成4个单独的字符串.

In my main delegate file I split an array into 4 separate strings like so.

NSArray *split=[currentParsedCharacterData componentsSeparatedByString:@"|"];
        NSLog([split objectAtIndex:3]);

        NSString *date=[split objectAtIndex:0];
        NSString *venue=[split objectAtIndex:1];
        NSString *event=[split objectAtIndex:2];
        NSString *city=[split objectAtIndex:3];

我已经找到了字符串值，它们肯定在那里.

I've traced out the string values and they are definitely there.

接下来，我尝试将这些字符串值添加到可变数组

Up next I try to add these string values to mutable arrays

[self.promoTabOptionEvents.dates addObject:date];
        [self.promoTabOptionEvents.venues addObject:venue];
        [self.promoTabOptionEvents.event addObject:event];
        [self.promoTabOptionEvents.city addObject:city];

当我在调试器中检查数组时，它们为空.我在做什么错了?

When I check the arrays in the debugger they are empty. What am I doing wrong?

promoTabOptionEvents类如下

promoTabOptionEvents class looks like this

@interface PromoTabOptionEvents : UIViewController {

    NSString *event_headline;
    NSMutableArray *dates;
    NSMutableArray *venues;
    NSMutableArray *event;
    NSMutableArray *city;

}

@property(nonatomic,retain)NSString *event_headline;
@property(nonatomic,retain)NSMutableArray *dates;
@property(nonatomic,retain)NSMutableArray *venues;
@property(nonatomic,retain)NSMutableArray *event;
@property(nonatomic,retain)NSMutableArray *city;
-(void)applyLabels;
-(id)initWithTabBar;
@end


#import "PromoTabOptionEvents.h"


@implementation PromoTabOptionEvents
@synthesize event_headline;
@synthesize dates;
@synthesize venues;
@synthesize event;
@synthesize city;

-(id) initWithTabBar {
    if ([self init]) {
        //this is the label on the tab button itself
        //self.title = @"Tab1";

        //use whatever image you want and add it to your project
        self.tabBarItem.image = [UIImage imageNamed:@"events.png"];

        // set the long name shown in the navigation bar
        self.navigationItem.title=@"Events";


        CGRect bgframe;
        bgframe.size.width=320; bgframe.size.height=460;
        bgframe.origin.x=0; bgframe.origin.y=0;
        UIImage* bgimage = [UIImage imageNamed:@"eventsbig.png"];
        UIImageView *imagebgview = [[UIImageView alloc] initWithImage: bgimage];
        imagebgview.frame=bgframe;
        imagebgview.contentMode=UIViewContentModeScaleAspectFit;
        self.view.backgroundColor=[UIColor whiteColor];
        [self.view addSubview:imagebgview];


    }
    return self;


}

推荐答案

能否在初始化NSMutableArray实例的位置添加代码?我认为您可能忘记了初始化数组，而您的addObject调用被吞没了，没有任何效果.

Can you add the code where you initialize your NSMutableArray instances? I think you might have forgotten to initialise the arrays and your addObject calls are being swallowed up with no effect.

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