如何在 iOS 中的 ViewController 上加载 .xib UIviews答案

【问题标题】：How to load .xib UIviews on ViewController in ios如何在 iOS 中的 ViewController 上加载 .xib UIviews
【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/…

标签： ios objective-c xib

【解决方案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。

【解决方案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。

【解决方案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

【讨论】：

【解决方案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。

【讨论】：

【解决方案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];

}

【讨论】：