Custom view does not show

[honkmaster]

I want to show a custom view using this code snippet.

func customView(forEmptyDataSet scrollView: UIScrollView!) -> UIView! {
        let view = UIView(frame: CGRect(x: 0, y: 0, width: 200, height: 200))
        view.backgroundColor = .green
        return view
}

The view does not show up. What's the issue here? Is it related to autolayout?

[monkeyRing]

@honkmaster you can't just add a view for the customView . you must be add some views ,some buttons or other Controls in the customView , and try again .

[supermnemonic]

i think something wrong with lib. so i tried this and worked.

func customView(forEmptyDataSet scrollView: UIScrollView!) -> UIView! {
    let view = EmptyStateView()
    view.frame = CGRect(x: 0, y: 0, width: scrollView.bounds.width, height: scrollView.bounds.height)
    scrollView.addSubview(view)
    return nil
}

EmptyStateView is custom view class, loaded from nib.

[libercata]

Try this

- (UIView *)customViewForEmptyDataSet:(UIScrollView *)scrollView {
    
    UIView *emptyView = [[UIView alloc] init];
    UILabel *lb = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 130, 40)];
    lb.text = @"UILabel";
    [emptyView addSubview:lb];
    emptyView.backgroundColor = [UIColor redColor];

    [emptyView mas_makeConstraints:^(MASConstraintMaker *make) {
        make.height.equalTo(@180);
    }];
    return emptyView;
}

[ashish-naik]

I have a customer activity view as below. It doesn't show.

import UIKit

class ProgressHUD: UIVisualEffectView {
    
    var text: String? {
        didSet {
            label.text = text
        }
    }
    
    let activityIndictor: UIActivityIndicatorView = UIActivityIndicatorView(activityIndicatorStyle: UIActivityIndicatorViewStyle.white)
    let label: UILabel = UILabel()
    let blurEffect = UIBlurEffect(style: .dark)
    let vibrancyView: UIVisualEffectView
    
    init(text: String) {
        self.text = text
        self.vibrancyView = UIVisualEffectView(effect: UIVibrancyEffect(blurEffect: blurEffect))
        super.init(effect: blurEffect)
        self.setup()
    }
    
    required init?(coder aDecoder: NSCoder) {
        self.text = ""
        self.vibrancyView = UIVisualEffectView(effect: UIVibrancyEffect(blurEffect: blurEffect))
        super.init(coder: aDecoder)
        self.setup()
    }
    
    func setup() {
        contentView.addSubview(vibrancyView)
        contentView.addSubview(activityIndictor)
        contentView.addSubview(label)
        activityIndictor.startAnimating()
        //UIApplication.shared.beginIgnoringInteractionEvents()

        
    }
    
    override func didMoveToSuperview() {
        super.didMoveToSuperview()
        
        if let superview = self.superview {
            
            let width = superview.frame.size.width / 2.3
            let height: CGFloat = 50.0
            self.frame = CGRect(x: superview.frame.size.width / 2 - width / 2,
                                y: superview.frame.height / 2 - height / 2,
                                width: width,
                                height: height)
            vibrancyView.frame = self.bounds
            
            let activityIndicatorSize: CGFloat = 40
            activityIndictor.frame = CGRect(x: 5,
                                            y: height / 2 - activityIndicatorSize / 2,
                                            width: activityIndicatorSize,
                                            height: activityIndicatorSize)
            
            layer.cornerRadius = 8.0
            layer.masksToBounds = true
            label.text = text
            label.textAlignment = NSTextAlignment.center
            label.frame = CGRect(x: activityIndicatorSize + 5,
                                 y: 0,
                                 width: width - activityIndicatorSize - 15,
                                 height: height)
            label.textColor = UIColor.white
            label.font = UIFont.boldSystemFont(ofSize: 16)
        }
    }

func show() {
    self.isHidden = false
    UIApplication.shared.beginIgnoringInteractionEvents()

}

func hide() {
    self.isHidden = true
    UIApplication.shared.endIgnoringInteractionEvents()
}

}

my customeView method is

func customView(forEmptyDataSet scrollView: UIScrollView!) -> UIView! {
        
            let progressHUD = ProgressHUD(text: "Loading")
progressHUD.show()
            return progressHUD
    }

if i return UIActivityIndicatorView then it shows up.