Cocoa 无法从对象创建NSArray

XCode错误：

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[Switching to process 2530 thread 0x0]
2011-11-12 18:29:29.857 RaiseMan[2530:707] Cannot create NSArray from object <Document: 0x100539a00> of class Document
2011-11-12 18:29:29.879 RaiseMan[2530:707] Cannot create NSArray from object <Document: 0x10015dda0> of class Document
2011-11-12 18:30:10.362 RaiseMan[2530:707] Cannot create NSArray from object <Document: 0x1001b0a90> of class Document

文件.h：

#import <Cocoa/Cocoa.h>

@interface Document : NSDocument
{
    NSMutableArray *employees;
}

- (void)setEmployees:(NSMutableArray *)a;

@end

---

完整项目代码：

如果不从ShareSend下载zip文件，请使用更好的主机，如Dropbox，或者更好的是使用某种形式的版本控制，我只能猜测您已将数组控制器的contentArray绑定到文档，但未能指定该文档的数组属性

---

告诉数组控制器将文档本身用作其内容数组将不起作用，因为文档不是数组。进入nib，选择阵列控制器，编辑contentArray绑定，并为要将其绑定到的阵列属性指定模型密钥路径。

我今天遇到了相同的问题，我已经解决了它。

---

您应该将列而不是单元格绑定到阵列控制器。

为什么不在错误消息中包含模块或调用的相关行，而不是希望人们下载zip文件？不确定您的意思是什么？我在顶部包含了完整的错误，在帖子中包含了完整的代码？我包括了完整的项目，因为有很多绑定之类的，因为这是一个图坦卡蒙我正在学习可可，我不知道我可能会做错什么。

#import "Person.h"

@implementation Person

- (id) init
{
    self = [super init];
    expectedRaise = 5.0;
    personName = @"New Person";
    return self;    
}

- (void)dealloc
{
    [personName release];
    [super dealloc];
}

@synthesize personName;
@synthesize expectedRaise;

@end

#import <Cocoa/Cocoa.h>

@interface Document : NSDocument
{
    NSMutableArray *employees;
}

- (void)setEmployees:(NSMutableArray *)a;

@end

#import "Document.h"

@implementation Document

- (id)init
{
    self = [super init];
    //if (self) {
        employees = [[NSMutableArray alloc] init];
    //}
    return self;
}

- (void)dealloc
{
    [self setEmployees:nil];
    [super dealloc];
}


-(void)setEmployees:(NSMutableArray *)a
{
    //this is an unusual setter method we are goign to ad a lot of smarts in the next chapter
    if (a == employees)
        return;
    [a retain];
    [employees release];
    employees = a;
}

- (NSString *)windowNibName
{
    // Override returning the nib file name of the document
    // If you need to use a subclass of NSWindowController or if your document supports multiple NSWindowControllers, you should remove this method and override -makeWindowControllers instead.
    return @"Document";
}

- (void)windowControllerDidLoadNib:(NSWindowController *)aController
{
    [super windowControllerDidLoadNib:aController];
    // Add any code here that needs to be executed once the windowController has loaded the document's window.
}

- (NSData *)dataOfType:(NSString *)typeName error:(NSError **)outError
{
    /*
     Insert code here to write your document to data of the specified type. If outError != NULL, ensure that you create and set an appropriate error when returning nil.
    You can also choose to override -fileWrapperOfType:error:, -writeToURL:ofType:error:, or -writeToURL:ofType:forSaveOperation:originalContentsURL:error: instead.
    */
    NSException *exception = [NSException exceptionWithName:@"UnimplementedMethod" reason:[NSString stringWithFormat:@"%@ is unimplemented", NSStringFromSelector(_cmd)] userInfo:nil];
    @throw exception;
    return nil;
}

- (BOOL)readFromData:(NSData *)data ofType:(NSString *)typeName error:(NSError **)outError
{
    /*
    Insert code here to read your document from the given data of the specified type. If outError != NULL, ensure that you create and set an appropriate error when returning NO.
    You can also choose to override -readFromFileWrapper:ofType:error: or -readFromURL:ofType:error: instead.
    If you override either of these, you should also override -isEntireFileLoaded to return NO if the contents are lazily loaded.
    */
    NSException *exception = [NSException exceptionWithName:@"UnimplementedMethod" reason:[NSString stringWithFormat:@"%@ is unimplemented", NSStringFromSelector(_cmd)] userInfo:nil];
    @throw exception;
    return YES;
}

+ (BOOL)autosavesInPlace
{
    return YES;
}

@end