ios - 创建类似于 Extension Swift 的 UIViewController 类别(Obj-C)

我正在尝试使用一些自定义方法扩展标准 UIViewController。

#import <UIKit/UIKit.h>

@interface UIViewController (UIViewControllerExtension)
- (void) showNoHandlerAlertWithTitleNSString *)title andMessage:     (NSString*)message;
- (void) showAlertWithTitleNSString *)title andMessageNSString*)message  buttonTitlesNSArray<NSString *>*)titles andHandlervoid (^)(UIAlertAction * action))handler;
@end

我现在如何使用扩展的 UIViewController？我需要从扩展的 UIViewController 继承我的自定义 View Controller 。

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Best Answer-推荐答案

创建一个文件“UIViewController+Alert.h”，其中包含:

#import <UIKit/UIKit.h>
@interface UIViewController (AlertExtension)
- (void) showNoHandlerAlertWithTitleNSString *)title andMessage:     (NSString*)message;
- (void) showAlertWithTitleNSString *)title andMessageNSString*)message  buttonTitlesNSArray<NSString *>*)titles andHandlervoid (^)(UIAlertAction * action))handler;
@end

然后，创建一个文件“UIViewController+Alert.m”，其中包含:

#import "UIViewController+Alert.h"
@implementation UIViewController (AlertExtension)
- (void) showNoHandlerAlertWithTitle:(NSString *)title andMessage:     (NSString*)message {
    // Insert code here
}

- (void) showAlertWithTitle:(NSString *)title andMessage:(NSString*)message  buttonTitles:(NSArray<NSString *>*)titles andHandler:(void (^)(UIAlertAction * action))handler {
    // Insert code here
}
@end

说你的“SampleViewController.h”:

#import <UIKit/UIKit.h>

@interface SampleViewController : UIViewController
@end

然后在“SampleViewController.m”中:

#import "SampleViewController.h"
#import "UIViewController+Alert.h"

@implementation SampleViewController
- (void)viewDidLoad {
    [super viewDidLoad];
    [self showNoHandlerAlertWithTitle"Hello" andMessage"World"];
}
@end

关于ios - 创建类似于 Extension Swift 的 UIViewController 类别(Obj-C)，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/46217694/