Question

XCode错误：

GNU gdb 6.3.50-20050815 (Apple version gdb-1708) (Mon Aug  8 20:32:45 UTC 2011)
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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

person.h：

#import <Foundation/Foundation.h>

@interface Person : NSObject
{
    NSString *personName;
    float expectedRaise;
}

@property (readwrite, copy) NSString *personName;
@property (readwrite) float expectedRaise;

@end

person.m：

#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

document.h：

#import <Cocoa/Cocoa.h>

@interface Document : NSDocument
{
    NSMutableArray *employees;
}

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

@end

document.m

#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

完整的项目代码：http://sharesend.com/zyca7

Answer 1

我今天遇到了同样的问题，我已经解决了。您应该将列而不是单元格绑定到数组控制器。

Answer 2

如果没有从ShareSend下载zip文件（请使用更好的主机，例如Dropbox，或者更好，某种形式的版本控制），我只能猜测你已将数组控制器的contentArray绑定到你的文档但未能指定该文档的数组属性。

告诉阵列控制器使用文档本身，因为它的内容数组不起作用，因为文档不是数组。进入你的nib，选择数组控制器，编辑contentArray绑定，并指定要绑定它的数组属性的模型键路径。

无法从对象创建NSArray

2 个答案: