TAOverlay is a minimalistic and simple overlay meant to display useful information to the user.

Requirements

• iOS 7.0+
• ARC

Installation

• Drag the TAOverlay/TAOverlay folder into your project.
• Ensure that TAOverlay.bundle is added to Targets->Build Phases->Copy Bundle Resources.
• import "TAOverlay.h"

Usage

Using TAOverlay in your app is very simple.

Showing TAOverlay

You can show the TAOverlay using one of the following:

+ (void) showOverlayWithLabel:(NSString *)status Options:(TAOverlayOptions)options;

• The status parameter is the text to display on the overlay. If the value is 'nil', overlay is shown without a label
• The options parameter is mask of options indicating the type and appearence of the overlay

+ (void) showOverlayWithLabel:(NSString *)status Image:(UIImage *)image Options:(TAOverlayOptions)options;

• The status parameter is the text to display on the overlay. If the value is 'nil', overlay is shown without a label
• The image parameter is the image to display as an icon on the overlay. The image cannot be 'nil'
• The options parameter is mask of options indicating the appearence of the overlay

+ (void) showOverlayWithLabel:(NSString *)status ImageArray:(NSArray *)imageArray Duration:(CGFloat)duration Options:(TAOverlayOptions)options;

• The status parameter is the text that you want displayed
• The imageArray parameter is an array containing UIImage objects. Use this if your animation is easily expressable in images. The array cannot be 'nil'
• The duration parameter is the duration of the animation to cycle through the array of images
• The options parameter is mask of options indicating the appearence of the overlay

Dismissing TAOverlay

You can hide the TAOverlay using:

+ (void) hideOverlay;

Example

[TAOverlay showOverlayWithLabel:@"This is the status" Options:(TAOverlayOptionOverlayTypeActivityDefault | TAOverlayOptionAllowUserInteraction | TAOverlayOptionOverlaySizeFullScreen | TAOverlayOptionAutoHide)];

The above shows the TAOverlay with the following properties:

• It's status is "This is a status"
• It's type is the default iOS Activity Indicator
• It's size is fullscreen
• It has user interaction enabled
• It has auto hide enabled

( More on these optons below )

Customization

TAOverlay has a lot of customization options.

TAOverlayOptions

TAOverlayOptions defines the following set of bitmasks that can be used to fine tune the appearence of the overlay:
( passed as parameters in the "show" methods of TAOverlay )

Appearence options

• TAOverlayOptionOpaqueBackground option indicates that the overlay does not have a blur effect, rather, a solid background
• TAOverlayOptionOverlayShadow options indicates that the overlay has a semi-transparent shadow over the whole screen behind it
• TAOverlayOptionAllowUserInteraction option indicates that the user can interact with objects behind the overlay
• TAOverlayOptionAutoHide option indicates that the overlay auto hides after a certain time, based on the length of the status string

Type options

• TAOverlayOptionOverlayTypeActivityDefault option indicates that the overlay shows ongoing activity using the default iOS Activity Indicator
• TAOverlayOptionOverlayTypeActivityLeaf options indicates that the overlay shows ongoing activity using a custom activity indicator of the style of a leaf Default option
• TAOverlayOptionOverlayTypeActivityBlur option indicates that the overlay shows ongoing activity using a custom activity indicator of the style of a blurred halo
• TAOverlayOptionOverlayTypeActivitySquare option indicates that the overlay shows ongoing activity using a custom activity indicator of the style of a rounded rectangle
• TAOverlayOptionOverlayTypeSuccess option indicates that the overlay shows a check mark inside a circle, signifying, successful completion of a task
• TAOverlayOptionOverlayTypeWarning option indicates that the overlay shows an exclamation mark inside a circle, warning the user of something
• TAOverlayOptionOverlayTypeError option indicates that the overlay shows a cross mark inside a circle, signifying, an un-successful event
• TAOverlayOptionOverlayTypeInfo option indicates that the overlay shows an information mark inside a circle, informing the user of something

Size options

• TAOverlayOptionOverlaySizeFullScreen option indicates that the overlay fills the whole screen
• TAOverlayOptionOverlaySizeBar options indicates that the overlay takes a bar like shape Default option
• TAOverlayOptionOverlaySizeRoundedRect option indicates that the overlay takes a rounded rect shape

Definitions

The header file includes the following definitions to tweak the appearence of the overlay:

• OVERLAY_LABEL_FONT The font of the status label
• OVERLAY_LABEL_COLOR The text color of the status label
• OVERLAY_ACTIVITY_DEFAULT_COLOR The color of the default type activity indicator
• OVERLAY_ACTIVITY_LEAF_COLOR The color of the leaf type activity indicator
• OVERLAY_ACTIVITY_BLUR_COLOR The color of the blur type activity indicator
• OVERLAY_ACTIVITY_SQUARE_COLOR The color of the square type activity indicator
• OVERLAY_SHADOW_COLOR The color of the semi-transparent shadow behind the overlay
• OVERLAY_BACKGROUND_COLOR The color of the background of the overlay
• OVERLAY_BLUR_TINT_COLOR The tint color of the blur of the overlay
• OVERLAY_SUCCESS_COLOR The color of the success icon
• OVERLAY_WARNING_COLOR The color of the warning icon
• OVERLAY_ERROR_COLOR The color of the error icon
• OVERLAY_INFO_COLOR The color of the information icon
• OVERLAY_ICON_THICKNESS The thickness of success, warning, error and information icons
• ANIMATION_DURATION The animation duration of the appearence and disappearence animations

Custom images

Custom images can be shown using the latter of the "show" methods described above. TAOverlay includes a UIImage category for masking images to a specific color. Use the following method to do so:

- (UIImage *) maskImageWithColor:(UIColor *)color;

• The color parameter is the color with which a given image is masked
• The return value is the masked image

Notifications

TAOverlay posts the following notifications via NSNotificationCenter in response to being shown/dismissed:

• TAOverlayWillAppearNotification when the show animation starts.
• TAOverlayDidAppearNotification when the show animation completes.
• TAOverlayWillDisappearNotification when the dismiss animation starts.
• TAOverlayDidDisappearNotification when the dismiss animation completes.

Each notification passes a userInfo dictionary holding the Overlay's status string (if any), retrievable via TAOverlayStatusUserInfoKey.

ToDo

• Customization methods
• Add progress indicator
• Enhance overlay to more than just providing information

Contributing to this project

If you have feature requests or bug reports, feel free to help out by sending pull requests or by creating new issues :)

Credits

TAOverlay is brought to you by Taimur Ayaz. If you're using TAOverlay in your project, attribution would be much appreciated :)

License

Copyright (c) 2015 Taimur Ayaz

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.