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从另一个类的方法调用当前类的方法

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-1

pankaj · 技术社区 · 14 年前

我正在研究一个类A,它有一个方法-(void)dosmthing1。我打电话给类B中的另一个方法-(void)dosmthing2。现在,在类B中执行一些操作后,该方法应该回调上一个类的方法-(void)dosmthing3。

如何从另一个类调用当前类的方法?有人能帮我吗?

提前谢谢

Eddi1:: 我的代码: 甲类

{
-(void) MethodA {

}

-(void) MethodB {
   ClassB *clsB = [[ClassB alloc] init];
   [clsB MethodC];
}  
}

乙类

{
  -(void)MethodC:(selector) {
  //here i want to call MethodA of classA, and i will prefer if it is possible by sending the name of the method as selector in this method(methodC)

    }  
}

EdT2::

另一个例子是我想做如下的事情:

ClassB *b = [[ClassB alloc] nitWithTarget:self selector:@selector(methodfromClassA) object:nil];

在这里,我想在类B中的某个任务完成后调用类A的方法,这也是从类A中调用的方法。

我希望现在很清楚。

EdTe3:

- (void)loadView {
    AsyncConnection *async =[[AsyncConnection alloc] init];
    [async getAsync:self callback:@selector(test1)];
}

以上代码来自头等舱

-(void)getAsync:(id)anObject callback:(SEL)selector {
    NSInvocationOperation *operation = [[NSInvocationOperation alloc] initWithTarget:anObject 
                                                                            selector:@selector(selector) 
                                                                              object:nil];
    [queue addOperation:operation];
    [operation release];

}

以上代码来自二级。这里我想调用一个作为选择器传递的第一类方法。

4 回复 | 直到 14 年前

bbum 14 年前

- (void)loadView {
    AsyncConnection *async =[[AsyncConnection alloc] init];
    [async getAsync:self callback:@selector(test1)];
}

-(void)getAsync:(id)anObject callback:(SEL)selector {
    NSInvocationOperation *operation = [[NSInvocationOperation alloc] 
         initWithTarget:anObject 
               selector:@selector(selector)
                 object:nil];

    [queue addOperation:operation];
    [operation release];

}

@selector() @selector(selector) SEL selector

AsyncConnection loadView

@property(retain) ClassA *callbackHandler;

- (void)loadView {
    AsyncConnection *async =[[AsyncConnection alloc] init];
    [async setCallbackHandler: self];
}

self.callbackHandler [self callbackHandler]

Joshua Nozzi 14 年前

The Objective-C Programming Language Cocoa Fundamentals Guide

Guided books

bbum 14 年前

classA *aObj;

@property(nonatomic, retain) classA *aObj;

@synthetize aObj;

// after init class b obj

[bOjb setAObj:self];

[aObj whateverMethodOfClassA];

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(classA-method-name:) name:@"notification-name" object:class-B-object ];

[[NSNotificationCenter defaultCenter] postNotificationName:@"notification-name" object:self];

hotpaw2 14 年前

delegate pattern