使用数组绑定NSRuleEditor行

Question

在开发者文档中我发现了这个:

NSRuleEditor暴露一个绑定,rows.您可以绑定rows到有序集合(例如实例NSMutableArray).集合中的每个对象都应具有以下属性:

• @"rowType"表示行类型的整数(NSRuleEditorRowType).

• @"subrows"包含给定行的直接嵌套子行的有序到多关系(例如NSMutableArray的实例).

• @"displayValues"包含行的显示值的有序多对多关系.

• @"criteria"包含行标准的有序到多个关系.

任何人都可以举例说明如何做到这一点？

Answer 1

===========编辑=============

据我研究，NSRuleEditor类头包含有关绑定的下一个文档：

* -- 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，我给出了下一个示例，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，当您向类中添加新行时，NSRuleEditor将使用该行。您还可以更改 KeyPath，以便自定义行类中的字段（ivars/properties）的调用方式可能与文档中指定的不同。

希望这能帮助您了解 NSRuleEditor 的工作原理。

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我找到了这篇文章，它应该可以帮助您了解 NSRuleEditor 的工作原理。