ios - 具有多个实例的自定义委托(delegate)方法

Question

我创建了一个自定义类 NetworkManager。它有两个可选的委托(delegate)方法。它工作得很好，但是，问题是当有多个 NetworkManager 实例时如何执行委托(delegate)方法。这是我的代码片段；

NetworkManager.h

@protocol NetworkManagerDelegate <NSObject>

@optional
//call back for success message
-(void)handleSuccessMessageWithDictionary:(NSDictionary *) jsonDictionary;

//call back for fail message
-(void)handleFailureMessageWitDictionary:(NSDictionary *) jsonDictionary;

@end
@interface NetworkManager : NSObject

@property (nonatomic,assign) id<NetworkManagerDelegate> delegate;

@end

然后在我的 View Controller 中我有:

#pragma-mark NetowrkManager Delegate
-(void)handleFailureMessageWitDictionary:(NSDictionary *)jsonDictionary{

//failure


}

-(void)handleSuccessMessageWithDictionary:(NSDictionary *)jsonDictionary{

//success

}

这对于 NetworkManager 的一个实例来说工作得很好，但是如何区分两个实例呢？

例如，

#pragma-mark NetowrkManager Delegate
-(void)handleFailureMessageWitDictionary:(NSDictionary *)jsonDictionary{

//if its networkManagerA do
// method A
//else if its networkManagerB do
//method B

-(void)handleSuccessMessageWithDictionary:(NSDictionary *)jsonDictionary{

//if its networkManagerA do
// method A
//else if its networkManagerB do
//method B

}

非常感谢任何建议!

Answer 1

将委托(delegate)对象的实例传递回委托(delegate)是正常的；请参阅 UITableViewDelegate 方法，例如:

- (BOOL)            tableView:(UITableView *)tableView
shouldHighlightRowAtIndexPath:(NSIndexPath *)indexPath;

这样一个委托(delegate)对象可以在多个实例上工作。