在目标C中实现基本的回调 [英] Implementing a basic callback in Objective C

问题描述

如何在目标C中实现原始回调?

How does one implement a raw callback in objective C?

我只想在我的UITableViewCell对象(自定义单元格)之一检测到触摸时通知ViewController.

I just want to notify a ViewController when one of my UITableViewCell objects(custom cell) detects touch.

我需要通知我的RootViewController，以便它可以创建另一个ViewController的对象并将其推入导航堆栈中.

I need to notify my RootViewController so that it can create an object of another ViewController and push it on the navigation stack.

推荐答案

您可以对secondVC使用如下所示的自定义init方法，并将_sender存储在全局变量或类变量中.像

You can use a custom init method like below for secondVC and store the _sender in global or class variable. like

id sender;

- (id)initWithSender:(id)_sender
{
    self = [super init];
    if (self) {
        sender=_sender;
    }
    return self;
}

从RootVC中

如下初始化secondvc并定义一个名为-(void)touchDetected的方法；在rootvc中.

from RootVC initialize secondvc as follows and define a method named -(void) touchDetected; in rootvc.

    secondvc=[[SecondVC alloc] initWithSender:self];
    [[self navigationController] pushViewController: secondvc animated:YES];    

在secondvc调用中检测到触摸时，这将通知rootvc在secondvc中检测到触摸.

when the touch is detected in secondvc call, this will notify your rootvc that the touch is detected in secondvc.

[sender touchDetected];

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