LIHAlert

LIHAlert provides animated banners for iOS. Updated to Swift 3

Demo Project

The LIHAlert workspace contains a demo project, also used for developments.

Requirements

Xcode 7+

Installation

LIHAlert is available through CocoaPods. To install it, simply add the following line to your Podfile:

pod "LIHAlert"

or

Copy the LIHAlert folder into your project.

For the swift 2 version

pod 'LIHAlert', '~> 1.1.0'

Usage

Import the module using

    import LIHAlert

To run the example project, clone the repo, and run pod install from the Example directory first.

Templates

LIHAlert contains some predefined alert templates for each Alert type.

• Text Alert
• Success alert
• Error alert
• Text with a title
• Processing Alert (Text with an ActivityIndicator)
• Text with a button
• Text with two buttons
• Custom view banner (also used to embed view controllers)

You can use following code snippets to use them.

1. Text Banner

    var textAlert: LIHAlert?
    override func viewDidLoad() {
        super.viewDidLoad()
        self.textAlert = LIHAlertManager.getTextAlert("Sample Message")
        self.textAlert?.initAlert(self.view)
    }
    func showBanner(sender: AnyObject) {
        self.textAlert?.show(nil, hidden: nil)
    }

Call showBanner() function to show the banner

2. Success Alert

var successAlert: LIHAlert?
override func viewDidLoad() {
    super.viewDidLoad()
    self.successAlert = LIHAlertManager.getSuccessAlert(message: "Successfully subscribed")
    self.successAlert?.initAlert(self.view)
}
func showBanner(sender: AnyObject) {
    self.successAlert?.show(nil, hidden: nil)
}

To change the icon,

    successAlert?.icon = UIImage(named:"imageName")

3. Error Alert

var errorAlert: LIHAlert?
override func viewDidLoad() {
    super.viewDidLoad()
    self.errorAlert = LIHAlertManager.getErrorAlert(message: "Failed. Please try again")
    self.errorAlert?.initAlert(self.view)
}
func showBanner(sender: AnyObject) {
    self.errorAlert?.show(nil, hidden: nil)
}

To change the icon,

    successAlert?.icon = UIImage(named:"imageName")

4. Text with title

    var textWithTitleAlert: LIHAlert?
    override func viewDidLoad() {
        super.viewDidLoad()
        self.textWithTitleAlert = LIHAlertManager.getTextWithTitleAlert("This is The Title", message: "This is a sample message.")
        self.textWithTitleAlert?.initAlert(self.view)
    }
    func showBanner(sender: AnyObject) {
        self.textWithTitleAlert?.show(nil, hidden: nil)
    }

5. Loading Alert

This is a banner with a text and an activity indicator. This is not an auto close banner. You have to hide it when the process is finished.

    var processingAlert: LIHAlert?
    override func viewDidLoad() {
        super.viewDidLoad()
        self.processingAlert = LIHAlertManager.getProcessingAlert("Fetching data...")
        self.processingAlert?.initAlert(self.view)
    }
    func showBanner(sender: AnyObject) {
        self.processingAlert?.show(nil, hidden: nil)
    }
    override hideBanner(sender: AnyObject) {
        self.processingAlert?.hide(nil)
    }

Call showBanner() function to show the banner and hideBanner() to hide the banner. To change the activity indicator style,

    processingAlert?.activityIndicatorStyle = UIActivityIndicatorViewStyle.WhiteLarge

6. Text with a button Alert

This alert contains a button along with a text. More suitable for notifying important messages to user.

    var textWithButtonAlert: LIHAlert?
    override func viewDidLoad() {
        super.viewDidLoad()
        self.textWithButtonAlert = LIHAlertManager.getTextWithButtonAlert("You have successfully subscribed for the monthly newsletter", buttonText: "Dismiss")
        self.textWithButtonAlert?.initAlert(self.view)
    }
    func showBanner(sender: AnyObject) {
        textWithButtonAlert?.show(nil, hidden: nil)
    }

Call showBanner() function to show the banner. Implement LIHAlertDelegate for button click events.

class ViewController: LIHAlertDelegate {
    func buttonPressed(button: UIButton) {
        print(“You have pressed the button”)
        self.textWithButtonAlert?.hideAlert(nil)
    }
}

7. Text with two buttons Alert

This alert contains two buttons along with a text.

    var textWithTwoButtonsAlert: LIHAlert?

    override func viewDidLoad() {
        super.viewDidLoad()
        self.textWithTwoButtonsAlert = LIHAlertManager.getTextWithTwoButtonsAlert("Do you want to subscribe for the monthly newsletter?", buttonOneText: "Subscribe", buttonTwoText: "Cancel")
        self.textWithTwoButtonsAlert?.initAlert(self.view)
    }
    func showBanner(sender: AnyObject) {
        textWithTwoButtonsAlert?.show(nil, hidden: nil)
    }

Call showBanner() function to show the banner. Implement LIHAlertDelegate for button click events.

class ViewController: LIHAlertDelegate {
    func buttonOnePressed(button: UIButton) {
        self.textWithTwoButtonsAlert?.hideAlert({ () -> () in
            self.successAlert?.show(nil, hidden: nil)
        })
    }
    func buttonTwoPressed(button: UIButton) {
        self.textWithTwoButtonsAlert?.hideAlert(nil)
    }
}

8. Custom View Alert

You can specify any view to act as the banner.

    var customViewAlert: LIHAlert?

    override func viewDidLoad() {
        super.viewDidLoad()
    //In this case I am using an ImageView as the banner
        let customView = UIImageView(frame: CGRectMake(0.0, 64.0, 100, 50))
        customView.image = UIImage(named: "customViewImage")
        self.customViewAlert = LIHAlertManager.getCustomViewAlert(customView)
        self.customViewAlert?.initAlert(self.view)
    }
    func showBanner(sender: AnyObject) {
        self.customViewAlert?.show(nil, hidden: nil)
    }

How to embed a view controller

var customViewAlert: LIHAlert?
override func viewDidLoad() {
    super.viewDidLoad()
    let vc = (self.storyboard?.instantiateViewController(withIdentifier: "TableVc"))!
    self.customViewAlert = LIHAlertManager.getCustomViewAlert(customView: vc.view)
    self.customViewAlert?.initAlert(self.view)
    self.addChildViewController(vc)
    vc.didMove(toParentViewController: self)
}
func showBanner(sender: AnyObject) {
    self.customViewAlert?.show(nil, hidden: nil)
}

See 'CustomAlertsViewController' for more embed view controller examples

How to create your own banner

    let alertTextAlert: LIHAlert = LIHAlert()
    alertTextAlert.alertType = LIHAlertType.Text
    alertTextAlert.contentText = message
    alertTextAlert.alertColor = UIColor(red: 102.0/255.0, green: 197.0/255.0, blue: 241.0/255.0, alpha: 1.0)
    alertTextAlert.alertHeight = 50.0
    alertTextAlert.alertAlpha = 1.0
    alertTextAlert.autoCloseEnabled=true
    alertTextAlert.contentTextColor = UIColor.whiteColor()
    alertTextAlert.hasNavigationBar = true
    alertTextAlert.paddingTop = 0.0
    alertTextAlert.animationDuration = 0.35
    alertTextAlert.autoCloseTimeInterval = 1.5

ALert Types

    enum LIHAlertType {
            case Custom, Text, TextWithLoading, TextWithIcon, TextWithButton, TextWithTwoButtons, TextWithTitle
    }

List of all properties

    //delegates
    public var delegate: LIHAlertDelegate?
    
    //Title
    public var titleLabel: UILabel?
    public var titleText: String //Default is "Sample Title"
    public var titleTextColor: UIColor //Default is UIColor.blackColor()
    public var titleTextFont: UIFont?
    public var titleTextFontSize: CGFloat?
    public var titleTextNumberOfLines: Int //Default is 1 
    
    
    //Content Text
    public var contentLabel: UILabel?
    public var contentText: String //Default is "Sample Content"
    public var contentTextColor: UIColor //Default is UIColor.blackColor()
    public var contentTextFont: UIFont?
    public var contentTextNumberOfLines: Int //Default is 2
    
    //TextWithLoading
    public var activityIndicatorStyle: UIActivityIndicatorViewStyle //Default is UIActivityIndicatorViewStyle.White
    
    //Icon
    public var  iconImageView: UIImageView?
    public var  icon: UIImage?
    
    //OneButton
    public var  button_textWithButton: UIButton?
    public var  buttonText: String //Default is "Dismiss"
    public var  buttonColor: UIColor //Default is UIColor.blueColor()
    public var  buttonTextColor: UIColor //Default is UIColor.whiteColor()
    public var  buttonFont: UIFont?
    public var  buttonBordercolor: UIColor //Default is UIColor.whiteColor()
    public var  buttonBorderWidth: CGFloat //Default is 1.0 
    public var  buttonCornerRadius: CGFloat //Default is 3.0
    public var  buttonWidth: CGFloat?
    
    //TWO BUTTONS
        //ButtonOne
    public var  buttonOne_textWithButton: UIButton?
    public var  buttonOneText: String //Default is "Dismiss"
    public var  buttonOneColor: UIColor //Default is UIColor.blueColor()
    public var  buttonOneTextColor: UIColor //Default is UIColor.whiteColor() 
    public var  buttonOneFont: UIFont?
    public var  buttonOneBordercolor: UIColor //Default is UIColor.whiteColor()
    public var  buttonOneBorderWidth: CGFloat //Default is 1.0
    public var  buttonOneCornerRadius: CGFloat //Default is 3.0
    
        //ButtonTwo
    public var  buttonTwo_textWithButton: UIButton?
    public var  buttonTwoText: String //Default is "Dismiss"
    public var  buttonTwoColor: UIColor //Default is UIColor.blueColor()
    public var  buttonTwoTextColor: UIColor //Default is UIColor.whiteColor()
    public var  buttonTwoFont: UIFont?
    public var  buttonTwoBordercolor: UIColor //Default is UIColor.whiteColor()
    public var  buttonTwoBorderWidth: CGFloat //Default is 1.0
    public var  buttonTwoCornerRadius: CGFloat //Default is 3.0
    
    //AlertView
    public var  alertView: UIView?
    public var  alertColor: UIColor //Default is UIColor.grayColor()
    public var  alertAlpha: CGFloat //Default is 1.0
    public var  alertHeight:CGFloat //Default is 75.0
    public var  paddingLeft: CGFloat //Default is 0.0
    public var  paddingTop: CGFloat //Default is 0.0
    public var  animationDuration: NSTimeInterval //Default is 0.5
    public var  alertType: LIHAlertType //Default is LIHAlertType.Text
    public var  autoCloseEnabled: Bool //Default is true
    public var  autoCloseTimeInterval: Double //Default is 3.0
    public var  hasNavigationBar: Bool //Default is false
    public var  touchBackgroundToDismiss: Bool //default is false
    public var  dimsBackground: Bool //default is false
    public var backgroundDimOpacity: CGFloat //default is 0.4

Use the completion callbacks

    //when showing an auto hiding banner
    lihAlert?.show({ () -> () in
                //alert showed
            }, hidden: { () -> () in
                //alert hidden
        })
        
        //when hiding a banner
        lihAlert?.hideAlert({ () -> () in
            //Banner hidden
        })

Known Issues

1. Top margin

In some projects the alert may appear with a margin on top. Hopefully this will be fixed in the next release. Until then use the following solution.

Solution

Even the navigation bar is there, set it to false.

alert.hasNavigationBar = false

ChangeLog

v2.1.1

Dim background, Touch background to dismiss

v2.0.4

Objective-C support(beta)

v2.0.2

Embed view controller support

v2.0.0

Updated to Swift 3

v1.1.0

Fixed an issue - Alerts comes to the top when it appears

v1.0.0

Banner templates

• Text only
• Text with a title
• Text with an ActivityIndicator
• Text with an icon
• Text with a button
• Text with two buttons
• Custom view banner

Author

Lasith Hettiarachchi, [email protected]

License

LIHAlert is available under the MIT license. See the LICENSE file for more info.