Question

我希望显示加载屏幕，直到从服务器获取数据为止。为此，我使用此代码https://gist.github.com/igordeoliveirasa/78a310f0348fcad9b270创建带有活动指示符的叠加层。

但这只有在我通过调用

在基础NavigationController屏幕上添加叠加层时才有效

LoadingOverlay.shared.showOverlay(self.navigationController?.view)

即使我的导航栏也覆盖了叠加层，用户也无法返回，以防页面需要更长时间才能加载。如果我尝试使用以下任何事情都没有发生。

LoadingOverlay.shared.showOverlay(self.view)

非常感谢任何提示或解决方案。

编辑 - 我正在尝试创建类似下面的内容，即使加载覆盖导航栏和标签栏仍会出现，用户可以对其进行任何操作

但是在使用我上面提供的链接的代码，以及@Cute Angel的代码时，我得到的是下面的内容，其中覆盖确实会出现，但它不会超过我在基本视图中添加的元素来自auto布局如果我使用self.view

如何在我ViewController的基本视图中添加的所有元素之上添加此叠加层，并保留导航栏和标签栏不带叠加层

我想要实现的是下面的内容

Answer 1

请尝试以下代码：

声明宏

#define IS_IPAD (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad)
#define IS_IPHONE (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPhone)

在.h

中声明属性和方法

@property (strong, nonatomic) UIActivityIndicatorView *indicator;
@property (strong, nonatomic) UIView *processView;

#pragma mark - Process view

- (void)showProcess:(UIView *)view;
- (void)hideProcess;

在.m

中合成属性并定义方法

@synthesize indicator, processView;

#pragma mark - Process view

- (void)showProcess:(UIView *)view
{
    if (self.processView == nil)
    {
        self.processView = [[UIView alloc] initWithFrame:view.frame]; // If you want to cover whole screen then apply [[UIScreen mainScreen] bounds]] as a frame
        self.processView.backgroundColor = [[UIColor blackColor] colorWithAlphaComponent:0.4];
        //self.processView.userInteractionEnabled = FALSE;

        UIView *viewInner = [[UIView alloc] init];
        if (IS_IPHONE)
            viewInner.frame = CGRectMake(0, 0, 90, 90);
        else
            viewInner.frame = CGRectMake(0, 0, 150, 150);
        viewInner.center = self.processView.center;
        viewInner.backgroundColor = [[UIColor blackColor] colorWithAlphaComponent:0.7];
        [viewInner.layer setCornerRadius:10.0f];
        [viewInner.layer setMasksToBounds:YES];

        self.indicator = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:IS_IPHONE?UIActivityIndicatorViewStyleWhite:UIActivityIndicatorViewStyleWhiteLarge];
        self.indicator.frame = CGRectMake(0, IS_IPHONE?-15:-30, viewInner.frame.size.width, viewInner.frame.size.height);
        self.indicator.hidesWhenStopped = YES;
        [viewInner addSubview:self.indicator];

        UILabel *lblLoading = [[UILabel alloc] initWithFrame:CGRectMake(5, viewInner.frame.size.height-(IS_IPHONE?45:70), viewInner.frame.size.width-10, IS_IPHONE?40:70)];
        lblLoading.backgroundColor = [UIColor clearColor];
        lblLoading.textColor = [UIColor whiteColor];
        lblLoading.textAlignment = NSTextAlignmentCenter;
        lblLoading.adjustsFontSizeToFitWidth = TRUE;
        lblLoading.font = [UIFont systemFontOfSize:IS_IPHONE?15.0f:24.0f];
        lblLoading.text = @"Loading...";
        [viewInner addSubview:lblLoading];

        [self.processView addSubview:viewInner];
    }
    [view addSubview:self.processView]; // If you want to cover whole screen then add it to [self.window addSubview:self.processView]
    [self performSelector:@selector(createProcess) withObject:nil afterDelay:0.1];
}

- (void)createProcess
{
    [self.indicator startAnimating];
}

- (void)hideProcess
{
    [self.indicator performSelector:@selector(stopAnimating) withObject:nil afterDelay:0.5];
    [self.processView performSelector:@selector(removeFromSuperview) withObject:nil afterDelay:0.5];
}

当您想要显示和隐藏

时

YourClassName * classObject = [[YourClassName alloc] init];
[classObject showProcess:self.view];

[classObject hideProcess];

对于斯威夫特： 1.声明变量

var processView: UIView?
var indicator: UIActivityIndicatorView?

2。定义方法

// MARK: - Process view

func showProcess(view:UIView) {

    UIScreen.mainScreen().bounds
    self.processView = UIView(frame: view.frame) // // If you want to cover whole screen then apply UIScreen.mainScreen().bounds as frame
    self.processView?.backgroundColor = UIColor.blackColor().colorWithAlphaComponent(0.4)

    let viewInner = UIView()
    let lblLoading = UILabel()

    if UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiom.Phone {

        viewInner.frame = CGRectMake(0, 0, 90, 90)
        self.indicator = UIActivityIndicatorView(activityIndicatorStyle: UIActivityIndicatorViewStyle.White)
        self.indicator!.frame = CGRectMake(0, -15, viewInner.frame.size.width, viewInner.frame.size.height)
        lblLoading.frame = CGRectMake(5, viewInner.frame.size.height-45, viewInner.frame.size.width-10, 40)
        lblLoading.font = UIFont.systemFontOfSize(15.0)

    }
    else {

        viewInner.frame = CGRectMake(0, 0, 150, 150)
        self.indicator = UIActivityIndicatorView(activityIndicatorStyle: UIActivityIndicatorViewStyle.White)
        self.indicator!.frame = CGRectMake(0, -30, viewInner.frame.size.width, viewInner.frame.size.height)
        lblLoading.frame = CGRectMake(5, viewInner.frame.size.height-70, viewInner.frame.size.width-10, 70)
        lblLoading.font = UIFont.systemFontOfSize(24.0)
    }

    viewInner.center = self.processView!.center
    viewInner.backgroundColor = UIColor.blackColor().colorWithAlphaComponent(0.7)
    viewInner.layer.cornerRadius = 10.0
    viewInner.layer.masksToBounds = true

    self.indicator!.hidesWhenStopped = true
    viewInner.addSubview(self.indicator!)

    lblLoading.backgroundColor = UIColor.clearColor()
    lblLoading.textColor = UIColor.whiteColor()
    lblLoading.textAlignment = NSTextAlignment.Center
    lblLoading.adjustsFontSizeToFitWidth = true
    lblLoading.text = "Loading..."
    viewInner.addSubview(lblLoading)

    self.processView!.addSubview(viewInner)

    view.addSubview(self.processView!) // If you want to cover whole screen then add it to self.window.addSubview(self.processView)
    self.performSelector("createProcess", withObject: nil, afterDelay: 0.1)
}

func createProcess() {

    self.indicator?.startAnimating()
}

func hideProcess() {

    self.indicator?.performSelector("stopAnimating", withObject: nil, afterDelay: 0.5)
    self.processView?.performSelector("removeFromSuperview", withObject: nil, afterDelay: 0.5)
}

在需要时打电话

var classObject = YourClass()
classObject.showProcess(self.view)

classObject.hideProcess()

在导航栏以外的完整屏幕上添加加载叠加层 - Swift

1 个答案: