如何将ViewController或View加载到具有透明背景的另一个ViewController中？

Question

在我的应用程序中，我希望在从UIButton调用时显示自定义弹出窗口。目前我正在使用TSAlertView，但我希望实现更多UI项目并拥有更多自定义构建。所以我想做的是在另一个viewcontroller中加载一个viewcontroller或view，并能够在它们之间传递信息。请参阅以下示例：

根据我的阅读，据说在另一个视图控制器中加载另一个视图控制器并不是一个好习惯。在这种情况下，我会假设uiview是推荐的方式。这是对的吗？

我希望弹出窗口后面的viewcontroller具有暗淡的外观，可能是暗色，不透明度设置为70％。我怎样才能做到这一点？

基本上我正在尝试使用另一个视图的外观来构建类似于AlertView的东西。

Answer 1

如果您打算完全屏蔽背景视图，可以将viewControllerB设置为Form Sheet。

当您准备好展示viewControllerB时，请使用：

[viewControllerA presentViewController:viewControllerB animated:TRUE completion:nil]

你需要一种方法来解雇viewControllerB;按钮，网络动作等

故事板的一个例子：

- (void)someMethod {
  UIStoryboard *storyboard = self.storyboard;
  ViewControllerB *viewCotrollerB = [storyboard instantiateViewControllerWithIdentifier:@"ViewControllerB"];
  [self presentModalViewController:viewControllerB animated:YES];
}

Answer 2

您好SReca，我也有同样的要求（如上图所示）来创建您所说的UIalertview视图。

在这里你必须创建一个新的UIView类而不是UIViewController，而不需要.xib。

在init方法的新UIView类中，您需要以编程方式创建用户界面。并尽可能多地保持其高度宽度。

为了加载这个新的UIView，您必须只创建该uiview的对象，并调用initwithframe，它将以编程方式呈现该视图，如uialerview。

这是参考的代码。

ModalPreviewViewController_iPhone.h

@interface ModalPreviewViewController_iPhone : UIView
@end

ModalPreviewViewController_iPhone.m

根据您在initWithFrame中的需要修改此示例代码

- (id)initWithFrame:(CGRect)frame
{
    self = [super initWithFrame:frame];
    if (self) {
        // Initialization code
        popUpView  = [[UIView alloc] initWithFrame:CGRectMake(30,30,260,420)];

        popUpBgView = [[UIView alloc] init];
        popUpBgView.frame =CGRectMake(0,0,260,420);
        [popUpBgView setBackgroundColor:[UIColor colorWithRed:51.0/255 green:51.0/255 blue:51.0/255 alpha:1]];
        [popUpView addSubview:popUpBgView];


        imageGalleryView=[[UIWebView alloc]initWithFrame:CGRectMake(0, 0, 260, 360)];
        [imageGalleryView setBackgroundColor:[UIColor redColor]];

        CGRect btnTempFrame=CGRectMake(5, 385, 90, 30);
        btnTemp=[[UIButton alloc]initWithFrame:btnTempFrame];
        [btnTemp setBackgroundImage:[UIImage imageNamed:@"btn_plain_iphone.png"] forState:UIControlStateNormal];
        [btnTemp.titleLabel setFont:[UIFont boldSystemFontOfSize:13]];
        [btnTemp.titleLabel setTextColor:[UIColor whiteColor]];
        [btnTemp addTarget:self action:@selector(onDownloadClick:) forControlEvents:UIControlEventTouchUpInside];

        CGRect btnSubscribeFrame=CGRectMake(100, 385, 90, 30);
        UIButton *btnSubscribe=[[UIButton alloc]initWithFrame:btnSubscribeFrame];
        [btnSubscribe setBackgroundImage:[UIImage imageNamed:@"btn_plain_iphone.png"] forState:UIControlStateNormal];

        [btnSubscribe.titleLabel setFont:[UIFont boldSystemFontOfSize:13]];
        [btnSubscribe.titleLabel setTextColor:[UIColor whiteColor]];
        [btnSubscribe setTitle:@"Subscribe" forState:UIControlStateNormal];
        [btnSubscribe addTarget:self action:@selector(moveTosubscribe:) forControlEvents:UIControlEventTouchUpInside];

        CGRect closeButtonFrame=CGRectMake(195, 385, 60, 30);
        UIButton *closeButton=[[UIButton alloc]initWithFrame:closeButtonFrame];
        [closeButton setBackgroundImage:[UIImage imageNamed:@"btn_plain_iphone.png"] forState:UIControlStateNormal];
        [closeButton.titleLabel setFont:[UIFont boldSystemFontOfSize:13]];
        [closeButton.titleLabel setTextColor:[UIColor whiteColor]];
        [closeButton setTitle:@"Close" forState:UIControlStateNormal];
        [closeButton addTarget:self action:@selector(closeView:) forControlEvents:UIControlEventTouchUpInside];

        CGRect swipeLabelFrame=CGRectMake(0, 0, 140, 15);
        UILabel *swipeLabel=[[UILabel alloc]initWithFrame:swipeLabelFrame];

        [swipeLabel setBackgroundColor:[UIColor clearColor]];
        [swipeLabel setText:@"> SWIPE TO SEE MORE"];
        [swipeLabel setTextColor:[UIColor lightGrayColor]];
        [swipeLabel setFont:[UIFont systemFontOfSize:12]];

        CGRect dateLabelFrame=CGRectMake(5, 365, 100, 15);
        dateLabel=[[UILabel alloc]initWithFrame:dateLabelFrame];

        [dateLabel setBackgroundColor:[UIColor clearColor]];
        [dateLabel setText:@"July 2013 #93"];
        [dateLabel setTextColor:[UIColor whiteColor]];
        [dateLabel setFont:[UIFont systemFontOfSize:13]];

        CGRect priceLabelFrame=CGRectMake(155, 365, 100, 15);
        priceLabel=[[UILabel alloc]initWithFrame:priceLabelFrame];

        [priceLabel setBackgroundColor:[UIColor clearColor]];
        [priceLabel setText:@"$3.9"];
        [priceLabel setTextColor:[UIColor colorWithRed:71.0/255 green:191.0/255 blue:226.0/255 alpha:1]];
        [priceLabel setFont:[UIFont systemFontOfSize:13]];
        [priceLabel setTextAlignment:NSTextAlignmentRight];



        CGRect labelFrame=swipeLabel.frame;
        labelFrame.origin=CGPointMake(popUpView.frame.origin.x+popUpView.frame.size.width - labelFrame.size.width, popUpView.frame.origin.y - labelFrame.size.height);


        [swipeLabel setFrame:labelFrame];

        [popUpView addSubview:imageGalleryView];
        [popUpView addSubview:btnTemp];
        [popUpView addSubview:closeButton];
        [popUpView addSubview:btnSubscribe];
        [popUpView addSubview:dateLabel];
        [popUpView addSubview:priceLabel];

        [UIView beginAnimations:@"curlup" context:nil];
        [UIView setAnimationDelegate:self];
        [UIView setAnimationDuration:.5];
        [UIView setAnimationTransition:UIViewAnimationTransitionCurlUp forView:popUpView cache:YES];
        [self addSubview:popUpView];

        [self addSubview:swipeLabel];
        [UIView commitAnimations];

        UIColor *color = [[UIColor alloc] initWithRed:0.0 green:0.0 blue:0.0 alpha:0.5];
        self.backgroundColor = color;

        [[[UIApplication sharedApplication] keyWindow] addSubview:self];
        [self initializeVariables];
    }
    return self;
}

在Parent View控制器中，只需创建UIView类的对象，并使用您想要的initWithFrame和大小调用它

ModalPreviewViewController_iPhone *mpvc=[ModalPreviewViewController_iPhone alloc];

        if(appDelegate.isIphone5)
            mpvc=[mpvc initWithFrame:CGRectMake(0,0,320,480)];
        else
            mpvc=[mpvc initWithFrame:CGRectMake(0,0,320,568)];

解雇UivewClass

在其中一个（UIviewClass）的方法（如closeView

）中写下以下句子来解除它

[self removeFromSuperview];

如果您遇到任何问题，请告诉我