另一個類的調用方法（例如通過單例類）？

Question

我用this簡單的教程來創建我的單例類。一切正常。有一兩件事不會在本教程中說，如何在這個類的方法，所以我可以從其他類訪問這些文件（例如，其它ViewControllers或AppDelegate的。）

我該怎麼辦呢？ 非常感謝！

Answer 1

您將像定義任何其他Objective-C文件一樣定義方法。爲公共方法的頭添加一個定義，然後在實現（.m）文件中實現它們。

#import <foundation/Foundation.h> 

@interface MyManager : NSObject { 
    NSString *someProperty; 
} 

@property (nonatomic, retain) NSString *someProperty; 

+ (id)sharedManager; 

//Add instance methods for your singleton here 
- (void)someSingletonMethod; 

@end 

用法：

[[MyManager sharedManager] someSingletonMethod]; 

Answer 2

單.h文件中

#import <Foundation/Foundation.h> 
@interface SingleTon : NSObject 
{ 
    NSString *sum; 

} 

+(SingleTon *) createSingleTon; 
-(NSString *) sumOfTwoNumbers:(NSString *) numOne :(NSString *)numTwo; 
@end 

單.m文件

#import "SingleTon.h" 

@implementation SingleTon 

+(SingleTon *) createSingleTon 
{ 
    static SingleTon *single= nil; 
    if (single == nil) { 

     single = [[SingleTon alloc] init]; 
    } 
    return single; 
} 

-(NSString *) sumOfTwoNumbers:(NSString *) numOne :(NSString *)numTwo 
{ 
    sum = [NSString stringWithFormat:@"%d",[numOne intValue] + [numTwo intValue]]; 
    return sum; 
} 

@end 

viecontroller.h文件

#import <UIKit/UIKit.h> 
#import "SingleTon.h" 
@interface ViewController : UIViewController 
{ 
    SingleTon *sing; 
    IBOutlet UITextField *one,*two,*sum; 
} 
-(IBAction)sum:(id)sender; 
@end 

viecontroller.m文件

#import "ViewController.h" 

@interface ViewController() 

@end 

@implementation ViewController 

- (void)viewDidLoad 
{ 
    [super viewDidLoad]; 
    sing = [SingleTon createSingleTon]; 
    // Do any additional setup after loading the view, typically from a nib. 
} 

-(IBAction)sum:(id)sender 
{ 
    sum.text = [sing sumOfTwoNumbers:one.text :two.text]; 

} 
@end 

O/P

Answer 3

讓你這樣一流的一類方法。也在.h文件中聲明它。

+(FFMainVC *)sharedSingleton 
{ 
    static FFMainVC *instance = nil; 

    if(instance == nil) 
     instance = [[FFMainVC alloc]init]; 

    return instance; 
} 
// write your method that you wants to access from other class. also declare this in .h as well 

-(void)showCartView 
{ 
     // Your Code 
} 
// make call of your method from second class like this 
[[FFMainVC sharedSingleton]showCartView];