如何创build和使用协议，如果多于一个类实现

我想在我的项目中创build一个协议为了符合一些参数，我有三个类来使用，所以我希望这些类符合协议。

所以请帮助我。

提前致谢

Answer 1

我只是给如何创build协议的基本思路

也读这个问题

#DetailViewController.h #import <UIKit/UIKit.h> @protocol MasterDelegate <NSObject> -(void) getButtonTitile:(NSString *)btnTitle; @end @interface DetailViewController : MasterViewController @property (nonatomic, assign) id<MasterDelegate> customDelegate; #DetailViewController.m if([self.customDelegate respondsToSelector:@selector(getButtonTitile:)]) { [self.customDelegate getButtonTitile:button.currentTitle]; } #MasterViewController.m create obj of DetailViewController DetailViewController *obj = [[DetailViewController alloc] init]; obj.customDelegate = self; [self.navigationController pushViewController:reportTypeVC animated:YES]; and add delegate method in MasterViewController.m for get button title. #pragma mark - #pragma mark - Custom Delegate Method -(void) getButtonTitile:(NSString *)btnTitle; { NSLog(@"%@", btnTitle); } 

Answer 2

就像你为一个类所做的那样，把它用于三个甚至几十个类，不pipe你的类符合多less个协议。

正如你所看到的，我在这里随机添加了许多委托协议

 @interface DetailViewController : UIViewController <UISplitViewControllerDelegate, NSCoding, UIAlertViewDelegate, UITableViewDataSource, UITableViewDelegate, UITextFieldDelegate> @property (strong, nonatomic) id detailItem; @property (weak, nonatomic) IBOutlet UILabel *detailDescriptionLabel; @end 

要创build协议，请参阅此处