用数组绑定行NSRuleEditor

Question

在开发人员文档中，我发现了以下内容：

NSRuleEditor公开了一个绑定，rows。可以将rows绑定到有序集合(例如NSMutableArray的实例)。集合中的每个对象都应该具有以下属性：

• @"rowType“表示行的类型(NSRuleEditorRowType)的整数。
• @“子行”是一个有序的多个关系(例如NSMutableArray的一个实例)，包含给定行的直接嵌套子行。
• @"displayValues“是一个有序到多个的关系，包含行的显示值。
• @“条件”一种排序为-多个包含行标准的关系。

任何人都可以举例说明如何做到这一点？

Answer 1

===========编辑=============

正如我所研究的，NSRuleEditor类头包含关于绑定的下一个文档：

* -- Bindings support -- */

/* Sets the class used when creating a new row in the "rows" binding; this class should be KVC and KVO compliant for the key paths listed below.  By default this is NSMutableDictionary */
- (void)setRowClass:(Class)rowClass;
- (Class)rowClass;

/* Set and get the key path for the row type, which is used to get the row type in the "rows" binding.  The row type is a value property of type NSRuleEditorRowType.  The default is @"rowType". */
- (void)setRowTypeKeyPath:(NSString *)keyPath;
- (NSString *)rowTypeKeyPath;

/* Set and get the key path for the subrows, which is used to determined nested rows in the "rows" binding.  The subrows property is an ordered to-many relationship containing additional bound row objects. The default is @"subrows". */
- (void)setSubrowsKeyPath:(NSString *)keyPath;
- (NSString *)subrowsKeyPath;

/* Set and get the criteria key path, which determines the criteria for a row in the "rows" binding.  (The criteria objects are what the delegate returns from - ruleEditor: child: forCriterion: withRowType:).  The criteria property is an ordered to-many relationship. The default is @"criteria". */
- (void)setCriteriaKeyPath:(NSString *)keyPath;
- (NSString *)criteriaKeyPath;

/* Set and get the display values key path, which determines the display values for a row (the display values are what the delegate returns from - ruleEditor: displayValueForCriterion: inRow:).  The criteria property is an ordered to-many relationship. The default is @"displayValues". */
- (void)setDisplayValuesKeyPath:(NSString *)keyPath;
- (NSString *)displayValuesKeyPath;

为了扩展答案，我将给出下一个示例，以便您了解如何将自己的类绑定为行：

@interface BindObject : NSObject

@property (nonatomic, assign) NSInteger rowType;
@property (nonatomic, strong) NSMutableArray *subrows;
@property (nonatomic, strong) NSMutableArray *displayValues;
@property (nonatomic, strong) NSMutableArray *criteria;

@end

// binding custom class as row class
[self.ruleEditor setRowClass:[BindObject class]];

现在，当您向NSRuleEditor添加新行时，您的类将被使用。您还可以更改KeyPath，以便您的自定义行类中的字段(ivars/属性)的调用可能与文档中指定的字段不同。

希望这将有助于您理解NSRuleEditor的工作原理。

-=-

我已经找到了这篇文章，它将帮助您理解NSRuleEditor是如何工作的。