您可以同时使用 Storyboard 和 Programmatic Code 吗？

Posted 2023-03-15

【中文标题】您可以同时使用 Storyboard 和 Programmatic Code 吗？

【英文标题】：Can you use both Storyboard and Programmatic Code?

【发布时间】：2015-04-30 06:38:26

【问题描述】：

我有一个 UILabel 和一个 UITextfield 和一个 UIButton 我将它们设置在情节提要中并将它们限制在 SuperView 中

后来，我发现我需要一个 UIScrollview 来确保内容正确显示

我的代码看起来像

@property (weak, nonatomic) IBOutlet UITextField *passwordTextField;
@property (weak, nonatomic) IBOutlet UITextField *passwordConfirmTextField;
@property (weak, nonatomic) IBOutlet UILabel *directionsLabel;
@property (weak, nonatomic) IBOutlet UIButton *saveButton;

@property UIScrollView *scrollView;
@property UIView *contentView;

@property UITapGestureRecognizer *tap;
@property CGSize kbSize;

@end

@implementation UserEditPasswordViewController

- (void)viewWillAppear:(BOOL)animated

    [self registerForKeyboardNotifications];


-(void)viewWillDisappear:(BOOL)animated

    [self deregisterFromKeyboardNotifications];


- (void)viewDidLoad 
    [super viewDidLoad];

    self.directionsLabel.text = @"Enter in and confirm a new password. \n Leave blank for no changes";
    [self createScrollView];
    [self createContentView];
    [self addSubViews];
    [self customizeSaveButton];



#pragma mark - ScrollView

- (void)createScrollView

    self.scrollView = [[UIScrollView alloc]initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height)];
    self.scrollView.contentSize = CGSizeMake(self.view.frame.size.width, self.view.frame.size.height);
    self.scrollView.delegate = self;


#pragma mark - Create ContentView
- (void)createContentView

    self.contentView = [[UIView alloc]initWithFrame:CGRectMake(0, 0, self.scrollView.frame.size.width, self.scrollView.frame.size.height)];


#pragma mark - Add Subiews
- (void)addSubViews

    [self.view addSubview:self.scrollView];
    [self.scrollView addSubview:self.contentView];
    [self.contentView addSubview:self.saveButton];
    [self.contentView addSubview:self.passwordTextField];
    [self.contentView addSubview:self.passwordConfirmTextField];
    [self.contentView addSubview:self.directionsLabel];


#pragma mark - Customize Save Button
- (void)customizeSaveButton

    self.saveButton.layer.cornerRadius = 5;
    self.saveButton.clipsToBounds = YES;


#pragma mark - Tap Gesture
- (void)tapGestureRecognizerEndsEditing

    // tap gesture to dismiss the keybaord when user taps anywhere on screen

    self.tap = [[UITapGestureRecognizer alloc]
                initWithTarget:self
                action:@selector(dismissKeyboard)];

    [self.view addGestureRecognizer:self.tap];




#pragma mark - Keyboard Notifications
- (void)registerForKeyboardNotifications 

    // registers notifications for when the keyboard is shown and when the keyboard is hidden
    [[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(keyboardWasShown:)
                                                 name:UIKeyboardDidShowNotification
                                               object:nil];

    [[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(keyboardWillBeHidden:)
                                                 name:UIKeyboardWillHideNotification
                                               object:nil];


- (void)deregisterFromKeyboardNotifications 

    // deregisters the keyboard notifications
    [[NSNotificationCenter defaultCenter] removeObserver:self
                                                    name:UIKeyboardDidHideNotification
                                                  object:nil];

    [[NSNotificationCenter defaultCenter] removeObserver:self
                                                    name:UIKeyboardWillHideNotification
                                                  object:nil];


- (void)keyboardWasShown:(NSNotification *)notification 
    [self tapGestureRecognizerEndsEditing];
    NSDictionary *info = [notification userInfo];

    self.kbSize = [[info objectForKey:UIKeyboardFrameBeginUserInfoKey] CGRectValue].size;

    UIEdgeInsets contentInsets = UIEdgeInsetsMake(0.0, 0.0, self.kbSize.height, 0.0);
    self.scrollView.contentInset = contentInsets;
    self.scrollView.scrollIndicatorInsets = contentInsets;

    CGRect aRect = self.view.frame;
    aRect.size.height -= self.kbSize.height;
    if (!CGRectContainsPoint(aRect, self.saveButton.frame.origin)) 
        CGPoint scrollPoint = CGPointMake(0, self.saveButton.frame.origin.y-self.kbSize.height);
        [self.scrollView setContentOffset:scrollPoint animated:YES];
    
    self.scrollView.scrollEnabled = TRUE;


- (void)keyboardWillBeHidden:(NSNotification *)notification

    [self.scrollView setContentOffset:CGPointZero animated:YES];
    self.scrollView.scrollEnabled = false;


- (void)dismissKeyboard

    // function to dismiss the keyboard
    [self.view endEditing:YES];

    [self.tap removeTarget:self action:@selector(dismissKeyboard)];

但是滚动视图不起作用。标签、文本字段和按钮显示正常。

我做错了什么？您可以使用故事板和程序代码的混合体，还是其中一种？

【问题讨论】：

尝试以编程方式设置滚动视图的内容大小

先交换两行：self.scrollView = [[UIScrollView alloc]initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height)]; 然后`self.scrollView.delegate = self;`

@kevin 你设置了scrollViewContent Size

如果你需要 scrollView 来避开键盘，最简单的方法 - 创建 TVC。

@AshokLondhe 我已经开始输入内容大小。我也把代表放在那里了。仍然无法正常工作。 Scrollview 似乎在那里，但标签、按钮和文本字段没有滚动

【参考方案1】：

请设置滚动视图的代理。

self.scrollView.delegate = self;

我希望它对你有用。

【讨论】：

@KevinL。是的，但是在错误的地方。在分配之前你认为self.scrollView 是什么？

我把委托放在 alloc init 之后。它仍然无法正常工作，因为键盘隐藏了保存按钮，我有键盘通知来向上移动滚动视图。滚动视图似乎存在，只是没有向上移动

【参考方案2】：

是的，我们都可以使用

首先我们必须创建滚动视图对象，然后将您的视图添加到滚动视图中，请检查以下代码，我试过它工作正常。

#import "ViewController.h"

@interface ViewController ()
@property (weak, nonatomic) IBOutlet UILabel *helloWorldLabel;

@end

@implementation ViewController

- (void)viewDidLoad 
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.

    UIScrollView *scrollView = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height)];
    scrollView.delegate = self;
    scrollView.backgroundColor = [UIColor redColor];
    [self.view addSubview:scrollView];
    [scrollView addSubview:self.helloWorldLabel];



- (void)didReceiveMemoryWarning 
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.


@end

如果要滚动滚动视图，请增加滚动视图内容大小，如下所示

    scrollView.contentSize = CGSizeMake(600, 2000);

【讨论】：

已经分配初始化：self.scrollView = [[UIScrollView alloc]initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height)] ;

我已经添加了 UIViews 并将它们限制在 superview 中，这是故事板上仅有的 3 个对象。滚动视图和添加子视图是以编程方式完成的。

好的，请提供代码。并将背景颜色添加到滚动视图并检查一次

我能知道这里内容视图的重要性吗？

我已将内容大小设置为视图的宽度和框架，但 IBOutlets 并没有与滚动视图一起移动。它们作为子视图添加到内容视图中，内容视图作为子视图添加到滚动视图