Easily integrate and high performance
Providing UIKit and CoreAnimation category
Read colour customisation from file
Support different themes
Generate picker for other libs with one line macro

Demo

Installation with CocoaPods
- Podfile
- Import
Usage
Advanced Usage

If you want to implement night mode in Swift project without import Objective-C code. NightNight is the Swift version which does the same work.

How To Get Started

DKNightVersion supports multiple methods for installing the library in a project.

Installation with CocoaPods

CocoaPods is a dependency manager for Objective-C, which automates and simplifies the process of using 3rd-party libraries like DKNightVersion in your projects. See the Get Started section for more details.

Podfile

To integrate DKNightVersion into your Xcode project using CocoaPods, specify it in your Podfile:

pod "DKNightVersion"

Then, run the following command:

$ pod install

Import

Import DKNightVersion header file

#import <DKNightVersion/DKNightVersion.h>

Usage

Checkout DKColorTable.txt file in your project, which locates in Pods/DKNightVersion/Resources/DKNightVersion.txt.

NORMAL   NIGHT
#ffffff  #343434 BG
#aaaaaa  #313131 SEP

You can also create another colour table file, and specify it with DKColorTable.

A, set color picker like this with DKColorPickerWithKey, which generates a DKColorPicker block

self.view.dk_backgroundColorPicker = DKColorPickerWithKey(BG);

After the current theme version change to DKThemeVersionNight, the view background colour would switch to #343434.

[DKNightVersionManager nightFalling];

Alternatively, you could change the theme version by manager's property themeVersion which is a string

DKNightVersionManager *manager = [DKNightVersionManager sharedInstance];
manager.themeVersion = DKThemeVersionNormal;

Advanced Usage

There are two approaches you can use to integrate night mode to your iOS App.

DKNightVersionManager

The latest version for DKNightVersion add a readonly dk_manager property for NSObject returns the DKNightVersionManager singleton.

Change Theme

You can call nightFalling or dawnComing to switch the current theme version to DKThemeVersionNight or DKThemeVersionNormal.

[self.dk_manager dawnComing];
[self.dk_manager nightFalling];

Modify themeVersion property to switch the theme version directly.

self.dk_manager.themeVersion = DKThemeVersionNormal;
self.dk_manager.themeVersion = DKThemeVersionNight;
// if there is a RED column in DKColorTable.txt (default) or in 
// other `file` if you customize `file` property for `DKColorTable`
self.dk_manager.themeVersion = @"RED";

Post Notification

Every time the current theme version changes, DKNightVersionManager would post a DKNightVersionThemeChangingNotification. If you want to do some customisation, you can observe this notification and react with proper actions.

DKColorPicker

DKColorPicker is the core of DKNightVersion. And this lib adds dk_colorPicker to every UIKit and Core Animation components. Ex:

@property (nonatomic, copy, setter = dk_setBackgroundColorPicker:) DKColorPicker dk_backgroundColorPicker;
@property (nonatomic, copy, setter = dk_setTintColorPicker:) DKColorPicker dk_tintColorPicker;

DKColorPicker is defined in DKColor.h file receives a DKThemeVersion as the parameter and returns a UIColor.

typedef UIColor *(^DKColorPicker)(DKThemeVersion *themeVersion);

Use DKColorPickerWithKey(key) to obtain DKColorPicker from DKColorTable
```
view.dk_backgroundColorPicker = DKColorPickerWithKey(BG);
```

Use DKColorPickerWithRGB to generate a DKColorPicker

view.dk_backgroundColorPicker =  DKColorPickerWithRGB(0xffffff, 0x343434);

DKColorTable

DKColorTable is a new feature in DKNightVersion which providing us with an elegant way to manage colour setting in a project. Use as follows:

There is a file called DKColorTable.txt

NORMAL   NIGHT
#ffffff  #343434 BG
#aaaaaa  #313131 SEP

The first line of this file indicated different themes. NORMAL is required column, and others are optional. So if you don't need to integrate different themes in your app, leave the first column in this file, like this:

NORMAL
#ffffff BG
#aaaaaa SEP

NORMAL and NIGHT are two different themes, NORMAL is the default and for normal mode. NIGHT is optional and for night mode.

You can add multiple columns in this DKColorTable.txt file as many as you want.

NORMAL   NIGHT    RED
#ffffff  #343434  #ff0000 BG
#aaaaaa  #313131  #ff0000 SEP

The last column is the key for a colour entry, DKNightVersion uses the current themeVersion (ex: NORMAL NIGHT and RED) and key (ex: BG, SEP) to find the corresponding colour in DKColorTable.

DKColorTable has a property file, it will loads the color setting in this file when + [DKColorTable sharedColorTable is called. Default value of file is DKColorTable.txt.

@property (nonatomic, strong) NSString *file;

You can also add another file into your project and fill your colour setting in that file.

// color.txt
NORMAL   NIGHT
#ffffff  #343434 BG

Also, do not forget to change the file property of the colour table.

[DKColorTable sharedColorTable].file = @"color.txt"

The code above would reload colour setting from color.txt file.

Create temporary DKColorPicker

If you'd want to create some temporary DKColorPicker, you can use these methods.

view.dk_backgroundColorPicker =  DKColorPickerWithRGB(0xffffff, 0x343434);

DKColorPickerWithRGB will return a DKColorPicker which set background color to #ffffff when current theme version is DKThemeVersionNormal and #343434 when it is DKThemeVersionNight.

There are also some similar functions like DKColorPickerWithColors

DKColorPicker DKColorPickerWithRGB(NSUInteger normal, ...);
DKColorPicker DKColorPickerWithColors(UIColor *normalColor, ...);

DKColor also provides a cluster of convenient API which returns DKColorPicker block, these blocks return the same colour in different themes.

+ (DKColorPicker)colorPickerWithUIColor:(UIColor *)color;

+ (DKColorPicker)colorPickerWithWhite:(CGFloat)white alpha:(CGFloat)alpha;
+ (DKColorPicker)colorPickerWithHue:(CGFloat)hue saturation:(CGFloat)saturation brightness:(CGFloat)brightness alpha:(CGFloat)alpha;
+ (DKColorPicker)colorPickerWithRed:(CGFloat)red green:(CGFloat)green blue:(CGFloat)blue alpha:(CGFloat)alpha;
+ (DKColorPicker)colorPickerWithCGColor:(CGColorRef)cgColor;
+ (DKColorPicker)colorPickerWithPatternImage:(UIImage *)image;
#if __has_include(<CoreImage/CoreImage.h>)
+ (DKColorPicker)colorPickerWithCIColor:(CIColor *)ciColor NS_AVAILABLE_IOS(5_0);
#endif

+ (DKColorPicker)blackColor;
+ (DKColorPicker)darkGrayColor;
+ (DKColorPicker)lightGrayColor;
+ (DKColorPicker)whiteColor;
+ (DKColorPicker)grayColor;
+ (DKColorPicker)redColor;
+ (DKColorPicker)greenColor;
+ (DKColorPicker)blueColor;
+ (DKColorPicker)cyanColor;
+ (DKColorPicker)yellowColor;
+ (DKColorPicker)magentaColor;
+ (DKColorPicker)orangeColor;
+ (DKColorPicker)purpleColor;
+ (DKColorPicker)brownColor;
+ (DKColorPicker)clearColor;

pickerify

DKNightVersion provides a powerful feature which can generate dk_xxxColorPicker with a macro called pickerify.

@pickerify(TableViewCell, cellTintColor)

It automatically generates dk_cellTintColorPicker for you.

DKImagePicker

Use DKImagePicker to change images when manager.themeVersion changes.

imageView.dk_imagePicker = DKImagePickerWithNames(@"normal", @"night");

The first argument passed into the function is used for NORMAL theme, and the second is used for NIGHT theme, the themes order is determined by the configuration in DKColorTable.txt file which is NORMAL and NIGHT.

If your file like this:

NORMAL   NIGHT    RED
#ffffff  #343434  #fafafa BG
#aaaaaa  #313131  #aaaaaa SEP
#0000ff  #ffffff  #fa0000 TINT
#000000  #ffffff  #000000 TEXT
#ffffff  #444444  #ffffff BAR

Set your image picker in this order:

imageView.dk_imagePicker = DKImagePickerWithNames(@"normal", @"night", @"red");

The order of images or names is the same in DKColorTable.txt file.

DKImagePicker DKImagePickerWithImages(UIImage *normalImage, ...);
DKImagePicker DKImagePickerWithNames(NSString *normalName, ...);

Contribute

Feel free to open an issue or pull request, if you need help or there is a bug.

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License

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

The MIT License (MIT)

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.

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