如何在 iOS 中的 ViewController 上加载 .xib UIviews

Posted 2023-02-24

【中文标题】如何在 iOS 中的 ViewController 上加载 .xib UIviews

【英文标题】：How to load .xib UIviews on ViewController in ios

【发布时间】：2016-02-15 08:57:17

【问题描述】：

您好，我是 ios 新手，在我的应用中，我正在使用 .xib 文件加载 UIView

当我单击第一个按钮时，我想加载 FirstView 并删除其他视图 当我单击第二个按钮时，我想加载 SecondView 并删除其他视图 当我单击第三个按钮时，我想加载 ThirdView 并删除 otherviews

我的代码：-

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController
@synthesize leftView,rightView;

- (void)viewDidLoad 
    [super viewDidLoad];


- (IBAction)FirstAction:(id)sender 

    FirstView * test1 = [[FirstView alloc]initWithFrame:CGRectMake(0, 0, rightView.frame.size.width, rightView.frame.size.height)];
    test1.autoresizingMask = UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleWidth;
    [rightView addSubview:test1];


- (IBAction)SecondAction:(id)sender 

    SecondView * test2 = [[SecondView alloc]initWithFrame:CGRectMake(0, 0, rightView.frame.size.width, rightView.frame.size.height)];
    test2.autoresizingMask = UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleWidth;
    [rightView addSubview:test2];


- (IBAction)ThirdAction:(id)sender 

    ThirdView * test3 = [[ThirdView alloc]initWithFrame:CGRectMake(0, 0, rightView.frame.size.width, rightView.frame.size.height)];
    test3.autoresizingMask = UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleWidth;
    [rightView addSubview:test3];


@end

【问题讨论】：

试试我提供的解决方案

您说您正在使用 xib 文件加载视图。但是您正在您的操作方法中以编程方式创建它们。你的项目中有 xib 文件吗？

是的，我的项目中有 xib 文件，这是我的示例应用程序

drive.google.com/file/d/0B05NQoG9RAmwd2NnU3AzVlRzdjg/…

【参考方案1】：

试试这段代码：我已经为视图编写了代码，它将在添加新视图之前删除以前的视图。

#import "ViewController.h"

@interface ViewController ()

    FirstView * test1;
    SecondView * test2;
    ThirdView * test3;


@end

@implementation ViewController
@synthesize leftView,rightView;

- (void)viewDidLoad 
    [super viewDidLoad];


    test1 = [[[NSBundle mainBundle] loadNibNamed:@"FirstView" owner:self options:nil] objectAtIndex:0];
    test2 = [[[NSBundle mainBundle] loadNibNamed:@"SecondView" owner:self options:nil] objectAtIndex:0];
    test3 = [[[NSBundle mainBundle] loadNibNamed:@"ThirdView" owner:self options:nil] objectAtIndex:0];



- (IBAction)FirstAction:(id)sender 

   test1.frame = CGRectMake(0, 0, rightView.frame.size.width, rightView.frame.size.height);
    test1.autoresizingMask = UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleWidth;
    [self removePreviousView:test1 FromSuperView:rightView];
    [rightView addSubview:test1];


- (IBAction)SecondAction:(id)sender 

    test2.frame = CGRectMake(0, 0, rightView.frame.size.width, rightView.frame.size.height);
    test2.autoresizingMask = UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleWidth;
    [self removePreviousView:test2 FromSuperView:rightView];
    [rightView addSubview:test2];


- (IBAction)ThirdAction:(id)sender 

    test3.frame = CGRectMake(0, 0, rightView.frame.size.width, rightView.frame.size.height);
    test3.autoresizingMask = UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleWidth;
    [self removePreviousView:test3 FromSuperView:rightView];
    [rightView addSubview:test3];



- (void)removePreviousView:(UIView*)previousView FromSuperView:(UIView*)view
    for (UIView *subView in view.subviews) 
        if (![subView isKindOfClass:[previousView class]]) 
            [subView removeFromSuperview];
        
    

@end

【讨论】：

如果有错误请修改好吗兄弟？

你检查了吗？兄弟

是的，我已经检查过您以错误的方式做几件事。就像您在 nib 中设置了视图的类，但您没有从 nib 加载视图。

如果你修改了，你能把那个示例项目发给我吗？

我已经更新了代码。将其替换为 UIViewController 中的代码并查看结果。

【参考方案2】：

1) 使视图全局化

FirstView * test1;
SecondView * test2;
ThirdView * test3;

随时从超级视图中删除：

[test1 removeFromSuperView];

2)添加标签查看

test1.tag = 10;

使用标签值移除视图：

[(UIView*)[rightView  viewWithTag:10] removeFromSuperview];

【讨论】：

抱歉sn-p中的任何类型。

嗨 @KDeogharkar 没有添加 xib UIview

所以你是说视图没有显示？

第一、二、三视图有xib？

让我们continue this discussion in chat。

【参考方案3】：

使用此代码。它包含一个 loadXib: 调用，该调用从具有给定名称的 nib 加载视图并返回它。

@interface ViewController ()

    FirstView * test1;
    SecondView * test2;
    ThirdView * test3;


@end

@implementation ViewController
@synthesize leftView,rightView;

- (void)viewDidLoad 
    [super viewDidLoad];


-(UIView*)loadXib:(NSString *)name

    UINib *nib = [UINib nibWithNibName:name bundle:nil];
    if (nib != nil)
    
        NSArray *items = [nib instantiateWithOwner:self options:nil];
        if (items != nil && items.count == 1)
        
            return (UIView*)items[0];
        
    
    return nil;


- (IBAction)FirstAction:(id)sender 

//   test1 = [[FirstView alloc]initWithFrame:CGRectMake(0, 0, rightView.frame.size.width, rightView.frame.size.height)];
    test1 = (FirstView*)[self loadXib:@"FirstView"];
    if (test1 != nil) 
        test1.autoresizingMask = UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleWidth;
        [rightView.subviews makeObjectsPerformSelector:@selector(removeFromSuperview)];
        [rightView addSubview:test1];
    


- (IBAction)SecondAction:(id)sender 

//    test2 = [[SecondView alloc]initWithFrame:CGRectMake(0, 0, rightView.frame.size.width, rightView.frame.size.height)];
    test2 = (SecondView*)[self loadXib:@"SecondView"];
    if (test2 != nil) 
        test2.autoresizingMask = UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleWidth;
[rightView.subviews makeObjectsPerformSelector:@selector(removeFromSuperview)];
            [rightView addSubview:test2];
        
    

- (IBAction)ThirdAction:(id)sender 

//    test3 = [[ThirdView alloc]initWithFrame:CGRectMake(0, 0, rightView.frame.size.width, rightView.frame.size.height)];
    test3 = (ThirdView*)[self loadXib:@"ThirdView"];
    if (test3 != nil ) 
        test3.autoresizingMask = UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleWidth;
[rightView.subviews makeObjectsPerformSelector:@selector(removeFromSuperview)];
            [rightView addSubview:test3];
        
    

    @end

【参考方案4】：

以下是您需要的方法。

/* 不带标签 */

- (void)removeSubviewsExpectView:(id)viewClass 

    for (UIView *subView in self.view.subviews) 

         if (![subView isKindOfClass:[viewClass class]]) 

                [subView removeFromSuperview];

        
    

/* 带标签 */

- (void)removeSubviewsExpectView:(int)viewTag 

    for (UIView *subView in self.view.subviews) 

        if (subView.tag != viewTag) 

            [subView removeFromSuperview];

        
    

希望对你有所帮助。

【参考方案5】：

首先你在NSBundle中创建UiViewIBOutlets然后你选择这个方法

- (IBAction)FirstAction:(id)sender 
    NSArray *viewsToRemove = [rightView subviews];
    for (UIView *v in viewsToRemove) 
     [v removeFromSuperview];
     
  UIView *firstViewUIView = [[[NSBundle mainBundle]   loadNibNamed:@"Test1" owner:self options:nil] firstObject];
   [rightView containerView addSubview:firstViewUIView];


- (IBAction)SecondAction:(id)sender 

       NSArray *viewsToRemove = [rightView subviews];
       for (UIView *v in viewsToRemove) 
         [v removeFromSuperview];
      
       UIView *secondView = [[[NSBundle mainBundle]   loadNibNamed:@"Test2" owner:self options:nil] firstObject];
      [rightView containerView addSubview:seconView];  


- (IBAction)ThirdAction:(id)sender 

         NSArray *viewsToRemove = [rightView subviews];
         for (UIView *v in viewsToRemove) 
          [v removeFromSuperview];
                   
            UIView *thirdView = [[[NSBundle mainBundle]   loadNibNamed:@"Test3" owner:self options:nil] firstObject];
           [rightView containerView addSubview:thirdView];