如何实现点击按钮跳转至仅含TextView的另一个ViewController

Got it, let's walk through how to implement this step by step—super straightforward once you break it down!

我会给你两种最常用的实现方式，按需选择就行：

方式一：用Storyboard（可视化快速实现） #

1. 准备目标输入页面 #

• 打开你的Storyboard，拖入一个新的UIViewController。
• 拖一个UITextView到这个新VC上，调整约束让它铺满屏幕（或者按你想要的布局来）。如果需要占位提示，TextView默认没有这个功能，你可以拖个UILabel叠在上面当占位，或者用代码实现占位逻辑（后面会提）。
• 给这个新VC设置Storyboard ID：选中它，在右侧Identity Inspector里，把Storyboard ID设为TextInputVC（选个好记的名字就行）。

2. 给按钮添加点击跳转逻辑 #

回到原ViewController，要么在Storyboard里按住Ctrl拖按钮到代码里创建IBAction，要么手动写点击事件：

// Swift 示例
@IBAction func openTextInputPage(_ sender: UIButton) {
    // 从Storyboard获取目标VC
    guard let textInputVC = storyboard?.instantiateViewController(withIdentifier: "TextInputVC") else {
        print("找不到对应的Storyboard ID，请检查配置")
        return
    }
    // 跳转方式二选一：导航栈push（如果原VC在导航栏里），或者模态弹出
    navigationController?.pushViewController(textInputVC, animated: true)
    // 模态弹出写法：present(textInputVC, animated: true)
}

// Objective-C 示例
- (IBAction)openTextInputPage:(UIButton *)sender {
    UIViewController *textInputVC = [self.storyboard instantiateViewControllerWithIdentifier:@"TextInputVC"];
    [self.navigationController pushViewController:textInputVC animated:YES];
    // 模态弹出写法：[self presentViewController:textInputVC animated:YES completion:nil];
}

方式二：纯代码创建（无需Storyboard） #

1. 创建目标输入页面类 #

新建一个TextInputViewController.swift（或Objective-C的.h/.m文件）：

// Swift 示例
import UIKit

class TextInputViewController: UIViewController, UITextViewDelegate {
    override func viewDidLoad() {
        super.viewDidLoad()
        view.backgroundColor = .white
        
        // 创建TextView
        let inputTextView = UITextView()
        inputTextView.translatesAutoresizingMaskIntoConstraints = false
        inputTextView.font = .systemFont(ofSize: 16)
        // 实现占位文本效果
        inputTextView.text = "请输入内容..."
        inputTextView.textColor = .lightGray
        inputTextView.delegate = self
        
        // 添加到视图并设置约束（铺满安全区域）
        view.addSubview(inputTextView)
        NSLayoutConstraint.activate([
            inputTextView.topAnchor.constraint(equalTo: view.safeAreaLayoutGuide.topAnchor),
            inputTextView.leadingAnchor.constraint(equalTo: view.leadingAnchor, constant: 16),
            inputTextView.trailingAnchor.constraint(equalTo: view.trailingAnchor, constant: -16),
            inputTextView.bottomAnchor.constraint(equalTo: view.safeAreaLayoutGuide.bottomAnchor)
        ])
    }
    
    // 处理占位文本的编辑状态切换
    func textViewDidBeginEditing(_ textView: UITextView) {
        if textView.text == "请输入内容..." && textView.textColor == .lightGray {
            textView.text = nil
            textView.textColor = .black
        }
    }
    
    func textViewDidEndEditing(_ textView: UITextView) {
        if textView.text.isEmpty {
            textView.text = "请输入内容..."
            textView.textColor = .lightGray
        }
    }
}

// Objective-C 示例
// TextInputViewController.h
#import <UIKit/UIKit.h>

@interface TextInputViewController : UIViewController <UITextViewDelegate>

@end

// TextInputViewController.m
#import "TextInputViewController.h"

@interface TextInputViewController ()
@property (nonatomic, strong) UITextView *inputTextView;
@end

@implementation TextInputViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    self.view.backgroundColor = [UIColor whiteColor];
    
    // 创建TextView
    self.inputTextView = [[UITextView alloc] init];
    self.inputTextView.translatesAutoresizingMaskIntoConstraints = NO;
    self.inputTextView.font = [UIFont systemFontOfSize:16];
    self.inputTextView.text = @"请输入内容...";
    self.inputTextView.textColor = [UIColor lightGrayColor];
    self.inputTextView.delegate = self;
    
    [self.view addSubview:self.inputTextView];
    
    // 设置约束
    [NSLayoutConstraint activateConstraints:@[
        [self.inputTextView.topAnchor constraintEqualToAnchor:self.view.safeAreaLayoutGuide.topAnchor],
        [self.inputTextView.leadingAnchor constraintEqualToAnchor:self.view.leadingAnchor constant:16],
        [self.inputTextView.trailingAnchor constraintEqualToAnchor:self.view.trailingAnchor constant:-16],
        [self.inputTextView.bottomAnchor constraintEqualToAnchor:self.view.safeAreaLayoutGuide.bottomAnchor]
    ]];
}

#pragma mark - UITextViewDelegate
- (void)textViewDidBeginEditing:(UITextView *)textView {
    if ([textView.text isEqualToString:@"请输入内容..."] && textView.textColor == [UIColor lightGrayColor]) {
        textView.text = @"";
        textView.textColor = [UIColor blackColor];
    }
}

- (void)textViewDidEndEditing:(UITextView *)textView {
    if (textView.text.length == 0) {
        textView.text = @"请输入内容...";
        textView.textColor = [UIColor lightGrayColor];
    }
}

@end

2. 按钮点击跳转逻辑 #

回到原ViewController，添加按钮点击事件：

// Swift 示例
@IBAction func openTextInputPage(_ sender: UIButton) {
    let textInputVC = TextInputViewController()
    navigationController?.pushViewController(textInputVC, animated: true)
    // 模态弹出写法：present(textInputVC, animated: true)
}

// Objective-C 示例
- (IBAction)openTextInputPage:(UIButton *)sender {
    TextInputViewController *textInputVC = [[TextInputViewController alloc] init];
    [self.navigationController pushViewController:textInputVC animated:YES];
    // 模态弹出写法：[self presentViewController:textInputVC animated:YES completion:nil];
}

小提醒 #

• 如果你的原ViewController不在导航栈里，一定要用present跳转，用push会报错哦。
• 要是需要把输入的内容传回原页面，可以用闭包（Swift）或者代理（OC/Swift通用），需要的话我可以再补充这部分细节！

内容的提问来源于stack exchange，提问作者user10171513