对按钮使用 prepareForSegue [英] use prepareForSegue for button

问题描述

我以编程方式创建按钮，并将按钮连接到另一个视图，但遇到了segue 问题我应该对故事板使用 prepareForSegue 方法，但我不知道互联网上如何有一些示例，但是当我使用该示例时会出错，请您帮帮我

Hi I create button programmatically and I connect my button to another view, but I got segue problem that I should use prepareForSegue method for storyboard but I don't know how there ar esome sample to the internet but I will get error when I used that sample, would you please help me

提前致谢！

这是我的代码

创建按钮

 UIButton * button = [UIButton buttonWithType:UIButtonTypeCustom]; 
        button.backgroundColor=[UIColor colorWithRed: 201.0/255.0 green: 201.0/255.0 blue:201.0/255.0 alpha: 1.0];
        button.tag = currentTag;
        currentTag++;
        [button.layer setBorderColor: [[UIColor blackColor] CGColor]];
        [button.layer setBorderWidth: 1.0];
        [button setTitle:[NSString stringWithFormat:@"%d",currentTag] forState:UIControlStateNormal];
        button.frame = CGRectMake(80*x, 32*y, 80, 32); 
        [button addTarget:self action:@selector(buttonPressed:) forControlEvents:UIControlEventTouchUpInside];
        [buttonView addSubview: button];

按钮操作

-(void)buttonPressed:(UIButton *)button
{
NSLog(@"button %u -- frame: %@", button.tag, NSStringFromCGRect(button.frame));
WeekView *crtObj=[[WeekView alloc]initWithNibName:@"WeekView" bundle:nil];
[self.navigationController pushViewController:crtObj animated:YES];
[crtObj release];


}

准备转场

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
if ([[segue identifier] isEqualToString:@"WeekView"]) {

        // Get reference to the destination view controller
       WeekView *vc = [segue destinationViewController];

        // Pass any objects to the view controller here, like...
        [vc setMyObjectHere:object];  //// I don't know what should I write instead of object
    }}

错误

编辑 2:**** 我有一个警告:

直接从视图控制器启动的 Segue 必须有一个标识符才能与 -[UIViewController performSegueWithIdentifier:sender:] 一起使用:

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
if ([[segue identifier] isEqualToString:@"WeekView"]) {

        // Get reference to the destination view controller
     //  WeekView *vc = [segue destinationViewController];

        // Pass any objects to the view controller here, like...
       // [vc setMyObjectHere:object];
    [segue.destinationViewController setTitle:@"WeekView"];
    }}

推荐答案

实际上有两种方法可以将视图控制器推送到导航控制器上.

There are really two ways to push a view controller onto the navigation controller.

1. 老方法，全在代码中.那就是你所做的.此时您可以完全忘记 segue.

1. The old way, all in code. That is what you did. You can completely forget about segues at this point.

新方法:在 Storyboard 中建立一个 Segue(将 segue 从一个视图控制器推送到一个新的视图控制器，您也在 Storyboard 中定义)，给它一个 Identifier 名称，然后使用此代码推送视图控制器.

The new way: establish a Segue in Storyboard (push segue from one view controller to a new view controller, which you also define in Storyboard), give it an Identifier name and then use this code to push the view controller.

.

[self performSegueWithIdentifier:myIdentifyer sender:self];

其中 self 是视图控制器.现在您可以在 prepareForSegue: 中进行自定义.

where self is the view controller. Now you can do the customizations in prepareForSegue:.

这篇关于对按钮使用 prepareForSegue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！