在故事板xcode中直接从视图控制器警告启动的Segues

问题描述

您好我已经以编程方式创建了按钮并将其连接到另一个视图，但我收到了segue警告

我应该使用 prepareForSegue 故事板的方法，但我不知道怎么样，互联网上有一些样本，但是当我使用那个样本时出现错误，请你帮帮我

这是我的代码

创建按钮

  UIButton * button = [UIButton buttonWithType：UIButtonTypeCustom]; 
 button.backgroundColor = [UIColor colorWithRed：201.0 / 255.0绿色：201.0 / 255.0蓝色：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 *）按钮
 {
 NSLog（@按钮％u  -  frame：％@，按钮。 tag，NSStringFromCGRect（button.frame））; 
 [self performSegueWithIdentifier：@WeekViewsender：self]; 
} 
  

准备segue 我的警告

直接从视图控制器启动的分段必须具有可用于的标识符 - [UIViewController performSegueWithIdentifier：sender：]

   - （void）prepareForSegue：（UIStoryboardSegue *）segue sender：（id）sender 
 {
 if（[[ segue identifier] isEqualToString：@WeekView]）{
 [segue.destinationViewController setTitle：@WeekView]; 
} 
} 
  

解决方案

直接从视图控制器启动的Segues必须具有一个标识符，用于 - [UIViewController performSegueWithIdentifier：sender：]

当您直接从Storyboard中的View Controller拖动se​​gue时（而不是从按钮或任何操作控件中）并且不键入标识符（名称）时会出现此警告。

你必须给这些人一个标识符，否则无法以编程方式调用它们......这就是为什么要像这样链接一个segue的唯一原因。 / p>

在Xcode 8中，您应该能够双击警告，让故事板显示违规的segue，以便您可以为其添加名称。

Hi I have created button programmatically and I connected it to another view, but I got segue warning

that I should use prepareForSegue method for storyboard but I don't know how, there are some sample on Internet but I get an error when I used that sample, would you please help me

here is my code

Creating Button

 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];

Action for button

-(void)buttonPressed:(UIButton *)button
{
    NSLog(@"button %u -- frame: %@", button.tag, NSStringFromCGRect(button.frame));
    [self performSegueWithIdentifier:@"WeekView" sender:self];
}

Prepare for segue MY Warning

Segues initiated directly from view controllers must have an identifier for use with -[UIViewController performSegueWithIdentifier:sender:]

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

解决方案

Segues initiated directly from view controllers must have an identifier for use with -[UIViewController performSegueWithIdentifier:sender:]

This warning occurs when you drag a segue directly from a View Controller in Storyboard (aka, not from a button or any action control) and don't type in an Identifier (Name).

You have to give these ones a Identifier or else there's no way to call them programmatically... which is the only reason why you would link a segue like this.

In Xcode 8, you should be able to double click the warning to have the storyboard bring up the offending segue so that you can add a name to it.

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