NSKeyedArchiver 不保存对象的所有属性

发布于 2024-11-07 08:14:25 字数 1548 浏览 0 评论 0原文

我遇到一个问题，除其他外，我正在保存一个具有颜色和标签属性的“节点”数组（下面的标题）。当保存为 - (void)saveDataToDiskWithPath:(NSURL*)path 时，日志显示这些属性存在。当我稍后从保存的文件中再次加载数组时，节点的框架仍然存在，但数组中的每个节点都丢失了其标签和颜色......有什么想法吗？我可能做错了什么？也许我只是累了，稍后一切都会有意义...

Node.h：

//
//  Node.h
//

#import <Cocoa/Cocoa.h>


@interface Node : NSView {
@private
    NSColor *thisColor;
    NSColor *originalColor;
    NSRect dragRect;
    BOOL msDn;
    long tag;
    BOOL amSelected;
}

@property long tag;
@property (nonatomic, retain) NSColor* originalColor;

- (id)initWithFrame:(NSRect)frame andColor:(NSColor*)color;
- (void)select:(BOOL)yesOrNo;

@end

保存方法：

- (void) saveDataToDiskWithPath:(NSURL*)path
{
    NSLog(@"Path is %@", [path absoluteString]);
    NSMutableDictionary * rootObject;
    rootObject = [NSMutableDictionary dictionary];
    for(Node* node in [sharedValues nodes]){
        NSLog(@"Node has color %@ and tag %ld.", [node originalColor], [node tag]);
    }
    [rootObject setValue: [imageView aPath] forKey:@"path"];
    [rootObject setValue:[sharedValues nodes] forKey:@"nodes"];
    [NSKeyedArchiver archiveRootObject: rootObject toFile: [path path]];
}

加载方法：

- (void)loadDataFromDiskWithPath:(NSURL*)path
{
    NSDictionary * rootObject;

    rootObject = [NSKeyedUnarchiver unarchiveObjectWithFile:[path path]];    
    [imageView setAPath:[rootObject valueForKey:@"path"]];
    [sharedValues setNodes:[rootObject valueForKey:@"nodes"]];
    [imageView setNeedsDisplay:YES];
}

原文

I am having an issue where I am saving, among other things, an array of "nodes" (header below) that posses a color and a tag property. When it saves as in - (void)saveDataToDiskWithPath:(NSURL*)path, the log shows that these properties exist. When I load the array again at a later time from the saved file, the frame of the node persists, but each node in the array has lost its tag and color...any ideas why? What could I be doing wrong? Maybe I'm just tired, and it will all make sense later...

Node.h:

//
//  Node.h
//

#import <Cocoa/Cocoa.h>


@interface Node : NSView {
@private
    NSColor *thisColor;
    NSColor *originalColor;
    NSRect dragRect;
    BOOL msDn;
    long tag;
    BOOL amSelected;
}

@property long tag;
@property (nonatomic, retain) NSColor* originalColor;

- (id)initWithFrame:(NSRect)frame andColor:(NSColor*)color;
- (void)select:(BOOL)yesOrNo;

@end

The save method:

- (void) saveDataToDiskWithPath:(NSURL*)path
{
    NSLog(@"Path is %@", [path absoluteString]);
    NSMutableDictionary * rootObject;
    rootObject = [NSMutableDictionary dictionary];
    for(Node* node in [sharedValues nodes]){
        NSLog(@"Node has color %@ and tag %ld.", [node originalColor], [node tag]);
    }
    [rootObject setValue: [imageView aPath] forKey:@"path"];
    [rootObject setValue:[sharedValues nodes] forKey:@"nodes"];
    [NSKeyedArchiver archiveRootObject: rootObject toFile: [path path]];
}

The load method:

- (void)loadDataFromDiskWithPath:(NSURL*)path
{
    NSDictionary * rootObject;

    rootObject = [NSKeyedUnarchiver unarchiveObjectWithFile:[path path]];    
    [imageView setAPath:[rootObject valueForKey:@"path"]];
    [sharedValues setNodes:[rootObject valueForKey:@"nodes"]];
    [imageView setNeedsDisplay:YES];
}

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谷夏 2024-11-14 08:14:25

您必须采用 NSCoding 协议并实现 -initWithCoder: 和 -encodeWithCoder: 方法才能正确归档对象。由于Node是采用该协议的UIView的子类，因此它的某些部分正在正确归档。这些是 UIView 及其父类的属性。为了确保正确归档，Node 也必须实现该协议。浏览此文档以获得更多见解。