标签: nsmutablearray

我有一个自定义类"人".

已创建多个Person对象并将其添加到名为"personArray"的NSMutableArray中.

然后我将其中一个传递给下一个视图,称为userView.

这些都已分配和初始化.

我使用的代码是:

[userView setPerson:[personArray objectAtIndex:indexPath.row]];

单击表格行时应用程序崩溃,在调试器中显示:

Loading program into debugger…
GNU gdb 6.3.50-20050815 (Apple version gdb-960) (Sun May 18 18:38:33 UTC 2008)
Copyright 2004 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured …

我得到的错误是

Terminating app due to uncaught exception 'NSGenericException', reason: '*** Collection <CALayerArray: 0x7c85080> was mutated while being enumerated.'

我理解的NSGenericException是,我在枚举时从数组中删除了一些东西.仍然知道并环顾四周我似乎无法解决我的问题.这是下面的代码.

-(void)tableView(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{
     //Checks if message has been read. If message has not it updates the unreadMessages array
     if ([unreadMessage containsObject:[NSString stringWithFormat:@"m%@",[[storage_array objectAtIndex:indexPath.row] objectForKey:@"id"]]] == TRUE && [[[storage_array objectAtIndex:indexPath.row] objectForKey:@"itemtype"] isEqualToString:@"message"]  == TRUE){

     //Unread
     [unreadMessage removeObject:[NSString stringWithFormat:@"m%@",[[storage_array objectAtIndex:indexPath.row] objectForKey:@"id"]]];
     [unreadMessage writeToFile:[self saveUnreadMessages] atomically:YES];
     //Read
     [readMessage addObject:[NSString stringWithFormat:@"m%@",[[storage_array objectAtIndex:indexPath.row] objectForKey:@"id"]]];
     [readMessage writeToFile:[self saveReadMessages] atomically:YES];
     [tableView reloadData];
 }
 else if …

for (XMLProductView *pV in entries) {
        NSString *test = pV.appName;
        [allTableData addObject:test];

        NSLog(@"Entries: %@", allTableData);
    }

在我,NSString *test我得到所有结果.为什么会出现NSMutableArray'allTableData' Null？

请看一下我的代码.我试图将一些Car对象添加到MutableArray*parkPlace(属性属于Park类)

我期待的结果应如下所示:

CarParkSim[2662:303] Parking: Car Number:1 At:3 o'clok Position:0
CarParkSim[2662:303] Parking: Car Number:2 At:4 o'clok Position:1
CarParkSim[2662:303] Parking: Car Number:3 At:5 o'clok Position:2

但是,我得到的实际结果是这样的:

2012-12-22 12:13:46.085 CarParkSim[2662:303] Parking: Car Number:1 At:3 o'clok Position:0
2012-12-22 12:13:46.087 CarParkSim[2662:303] Parking: Car Number:2 At:4 o'clok Position:0
2012-12-22 12:13:46.088 CarParkSim[2662:303] Parking: Car Number:3 At:5 o'clok Position:0

我确实检查了NSmutablearray,它是空的......似乎把任何东西都推到了堆栈......任何建议？谢谢

无论如何,这里是代码:Park类:

#import <Foundation/Foundation.h>
#import "Stack.h"
#import "Car.h"

@interface Park : NSObject
@property(strong,nonatomic)NSMutableArray *parkPlace;
@property(strong,nonatomic)Car *car;
-(void)carMoveIntoPark:(Car *)car;
@end

#import "Park.h"
@implementation Park

-(void)carMoveIntoPark:(Car *)car
{

if ([self.parkPlace count] …

所以我想知道当我这样做会发生什么

NSMutableArray *arr1 = [[NSMutableArray alloc] init];
NSMutableArray *arr2 = [[NSMutableArray alloc] init];

[arr1 addobject:ob1];

arr2 = arr1;

[self changeValue:[arr2 objectAtIndex:2]]; //function that will modify what is sent to it

1)我甚至可以在nsmutablearrays之间进行操作吗？
2)如果我要访问arr1中的对象,是否会被修改？
3)它有多深？ - 如果我要从其他地方访问该对象,是否会被修改？
4)我假设使用mutableCopy将返回一个全新的数组.
5)无论如何都要模拟这种深层连接/连接？例如,如果我想将同一个对象分配给2个不同的数组,那么如果我修改了一个,那么它会改变两个数组中的那个对象吗？
6)这个词代表什么？我不认为它是连接/连接.

非常感谢
- 詹姆斯

我只是试图在这两个类之间传递一个NSArray,每当我在B类中NSLog它的值时它返回NIL.

为什么这样,我如何让它显示到这个UITableView？

这是Class Ah

#import <UIKit/UIKit.h>
#import "Class B.h"

@class Class B;

@interface Class A : UIViewController  <UITableViewDataSource, UITableViewDelegate, UICollectionViewDataSource, UICollectionViewDelegate, UIPopoverControllerDelegate> {

    IBOutlet UITableView *ToolsTable;
    IBOutlet UICollectionView *strategyCollection;
    IBOutlet UIButton *countButton;
    IBOutlet UIButton *camerButton;
    IBOutlet UIButton *videoButton;
    IBOutlet UIButton *textButton;
    IBOutlet UIButton *probeButton;
    IBOutlet STPopOverQuestionViewViewController *questionListController;
    IBOutlet UIPopoverController *questionList;
    NSMutableDictionary *stratToolsDict;
    NSMutableArray *stratTools;
    NSMutableArray *stratObjects;
    NSMutableDictionary *QuestionDict;
    NSMutableArray *QuestionsList;
}

@property (strong, nonatomic) IBOutlet UIView *strategyOBJView;
@property (retain, nonatomic) NSMutableDictionary *stratToolsDict;
@property (retain, nonatomic) NSMutableArray *stratTools;
@property (retain, nonatomic) …

我以为这个计数会返回26,但它会返回零.az是未初始化的UIImageViews.你现在问题可能是什么？

 NSMutableArray *letters = [[NSMutableArray alloc]initWithObjects: a,b,c,d,e,f,g,self.h,i,j,k,l,m,n,o,p,q,r,s,t,u,v,w,x,y,z, nil];


 NSLog(@"%d",(int)[letters count]);

当我尝试将nsarray对象插入到可变的swift数组时,我得到了这个控制台输出.代码工作正常,但最后,它抛出一个错误.请帮我解决这个错误.

Successfully retrieved 3 scores.
Optional("HmEbbowtxW")
<Events: 0x7b08bdf0, objectId: HmEbbowtxW, localId: (null)> {
    CreatedBy = "<PFUser: 0x7b02ed10, objectId: 04jp1ZeBn6>";
    EventDescription = test;
    EventName = test;
}
Optional("97BzKUxFdE")
<Events: 0x7b08cae0, objectId: 97BzKUxFdE, localId: (null)> {
    CreatedBy = "<PFUser: 0x7b02ed10, objectId: 04jp1ZeBn6>";
    EventDescription = fg;
    EventName = gfg;
}
Optional("QDHkg5tiUw")
<Events: 0x7b08cf80, objectId: QDHkg5tiUw, localId: (null)> {
    CreatedBy = "<PFUser: 0x7b02ed10, objectId: 04jp1ZeBn6>";
    EventDescription = asdasdasd;
    EventName = sdsd;
}
Could not cast value of type '__NSArrayI' (0x228e164) to 'NSMutableArray' (0x228e1c8).

这是我的代码 …

如何将自定义类对象附加到Swift中的数组？下面是我的代码,但它显示错误.

错误:

"无法指定'()'的值来输入[PhotoVC]"

码:

var photoVCs = [PhotoVC]()
for index in 0 ..< photos.count {
    if let vc = getPhotoController(index) {
        photoVCs = photoVCs.append(vc)
    }
}

func getPhotoController(index: Int) -> PhotoVC? {
    if index < 0 || index == NSNotFound {
        return nil
    }
    else if index == photos.count {
        return nil
    }

    let PhotoVCID = "PhotoVCID"
    if let storyboard = storyboard,
        pageVC = storyboard.instantiateViewControllerWithIdentifier(PhotoVCID) as? PhotoVC {
        pageVC.photoName = photos[index]
        pageVC.photoIndex = index
        return pageVC
    }
    return nil
} …

我不小心将手机中的iOS版本从10.3.3更新到了11.0.3。因此，我不得不将xcode升级到最新的9.1版本。现在，当我在xcode 9.1中运行代码时，

无法将类型“ Swift._ContiguousArrayStorage”的值转换为“ NSMutableArray”

似乎不再有从“ AnyObject”数组到“ NSMutableArray”的转换。但是我在整个代码中都使用了这种转换。我花了将近一天的时间尝试使用[[String：AnyObject]]而不是[AnyObject]，这不是一个好主意，因为它会影响整个代码，并且感觉就像我从头开始重新编写代码。任何人都可以提出更好的解决方案。