objective-c - 将委托(delegate)移至他们自己的类(class)？

Question

我的 View Controller 对我来说有点大了。我正在实现五个委托(delegate)协议(protocol)，并准备添加第六个。

ABCViewController : UITableViewController<NSFetchedResultsControllerDelegate,
                                          UITableViewDelegate,
                                          UITableViewDataSource,
                                          UIAlertViewDelegate,
                                          CLLocationManagerDelegate>

用一个 Controller 来实现所有这些似乎很荒谬，但它们并没有在其他地方使用。这些应该在自己的类中还是在 View Controller 中？

Answer 1

您可以向 ABCViewController 添加类别，如下所示:

<强>1。将 ABCViewController.m 中的所有声明移至 ABCViewController.h 中的私有(private)类别

// in ABCViewController.h
@interface ABCViewController : UIViewController <delegates>
// anything that's in the _public_ interface of this class.
@end

@interface ABCViewController ()
// anything that's _private_ to this class.  Anything you had defined in the .m previously
@end

<强>2。 ABCViewController.m 应该包含 .h。

<强>3。然后在ABCViewController+SomeDelegate.h和.m

// in ABCViewController+SomeDelegate.h
@interface ABCViewController (SomeDelegateMethods)

@end

// in ABCViewController+SomeDelegate.m
#import "ABCViewController+SomeDelegate.h"
#import "ABCViewController.h"  // here's how will get access to the private implementation, like the _fetchedResultsController

@implementation ABCViewController (SomeDelegateMethods)

// yada yada

@end