从另一个ViewController调用方法 [英] Calling method from another ViewController

问题描述

我有一个ViewControllerA和一个ViewControllerB。我想从ViewControllerB调用ViewControllerA的方法。

I have a ViewControllerA and a ViewControllerB. I want calling a method of ViewControllerA from ViewControllerB.

在ViewControllerA中有一个方法：

In ViewControllerA is present a method:

  -(NSMutableArray*) loadData;

在ViewControllerB.h中：

In ViewControllerB.h:

 #import "ViewControllerA.h"
  .......
 @property (nonatomic, strong) ViewControllerA * viewControllerA;
 @property (nonatomic, strong) NSMutableArray * mutableArray;

在ViewControllerB.m中：

In ViewControllerB.m:

self.mutableArray =[viewControllerA loadData];

但该方法未调用。为什么？提前致谢

but the method is not calling. Why? Thanks in advance

推荐答案

您缺少

self.

只要在viewControllerB中的某个地方：

As long as somewhere in viewControllerB:

self.viewControllerA = [[viewControllerA alloc]init];  //or some other initialization occurs...

然后：

self.mutableArray =[self.viewControllerA loadData];

将有效。

这篇关于从另一个ViewController调用方法的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！