iOS Development tools

Set of Extensions and Custom control for standard types and classes.

Just like Doraemon’s pocket, has an endless variety of props for us to use.

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KJCategoriesDemo

• [x] OpenCV: Hough correction, feature extraction, image processing package, morphological processing, filter processing, photo restoration, etc.
• [x] NSArray: Related processing of the elements in the array, etc.
• [x] NSDate: Time transformation, etc.
• [x] UIButton: Emitter animation, image and text mixing, click event encapsulation, expanded click field, time interval limit, countdown, click particle effect, etc.
• [x] UIView: Gesture package, rounded corner gradient, Xib attribute, basic animation package, etc.
• [x] UITextView: Expand the input box, limit the number of words, cancel processing, get the internal hyperlink of the text, etc.
• [x] UITextField: Placeholder color, line, graphic processing, etc.
• [x] UILabel: Rich text, fast display text position, etc.
• [x] UIImage: Screenshot and cropping, image compression, mask processing, image stitching, image size processing, filter rendering, flooding algorithm, etc.
• [x] UIImage: QR code, barcode generation, dynamic image playback, watermark processing, etc.
• [x] NSObject: GCD, asynchronous timer, resident thread, thread keep alive, runtime methods, etc.
• [x] NSString: Hash crypto, mathematical operators, unit conversion, etc.
• [x] Other: Gradient slider, Open screen particle animation, projection and shadow, etc.

Encapsulation exception Handling KJExceptionDemo

Quick creation of chained UI controls ChainThen

Catalogue list

• OpenCV
• NSArray
• NSDate
• NSDictionary
• NSObject
• NSString
• UIButton
• UIColor
• UIDevice
• UIImage
• UILabel
• UISlider
• UITextField
• UITextView
• UIView
• UIViewController

Methods and Functions

OpenCV

• Opencv picture processing.

Name	Signatures
Picture Tile	kj_opencvTiledRows:cols:
Four-point perspective image based on perspective	kj_opencvWarpPerspectiveWithKnownPoints:size:
Eliminate image highlights	kj_opencvIlluminationChangeBeta:alpha:
Picture Blending	kj_opencvBlendImage:alpha:
Adjust picture brightness and contrast	kj_opencvChangeContrast:luminance:
Modify the color of the picture channel value	kj_opencvChangeR:g:b:
Blur processing	kj_opencvBlurX:y:
Gaussian Blur	kj_opencvGaussianBlurX:y:
Median Blur	kj_opencvMedianBlurksize:
Gaussian Bilateral Blur	kj_opencvBilateralFilterBlurRadio:sigma:
Custom linear blur	kj_opencvCustomBlurksize:
Morphology operations	kj_opencvMorphology:element:
Remove watermark	kj_opencvInpaintImage:
Picture repair, effect enhancement processing	kj_opencvRepairImage
Cut out the largest inner rectangular area	kj_opencvCutMaxRegionImage
Feature extraction	kj_opencvFeatureExtractionFromSobel
Hough line judgment and correction	kj_opencvHoughLinesCorrectTextImageFillColor:

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NSArray

• Related processing of the elements in the array.

Name	Signatures
Is it empty	isEmpty
Filter data	kj_detectArray:
Multidimensional array data	kj_detectManyDimensionArray:
Search data	kj_searchObject:
Map	kj_mapArray:
Insert data to the destination	kj_insertObject:
Array calculation intersection	kj_arrayIntersectionWithOtherArray:
Array calculation difference	kj_arrayMinusWithOtherArray:
Randomly Disorganize Array	kj_disorganizeArray
Delete the same element in the array	kj_delArrayEquelObj
Binary Search	kj_binarySearchTarget:
Bubble Sort	kj_bubbleSort
Insert Sort	kj_insertSort
Selection Sort	kj_selectionSort

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NSDate

• Time transformation.

Name	Signatures
Convert date to local time	kj_localeDate
Time string conversion NSDate	kj_dateFromString:
Time string to NSDate	kj_dateFromString:format:
Get the current timestamp	kj_currentTimetampWithMsec:
Timestamp to time	kj_timeWithTimestamp:format:
Get the UTC timestamp of the specified time	kj_timeStampUTCWithTimeString:

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NSDictionary

• Dictionary common methods.

Name	Signatures
Is it empty	isEmpty
Convert to Josn String	jsonString
Whether to include a key	kj_containsKey:
Dictionary keys in ascending order	kj_keysSorted
Dictionary key name descending order	kj_keySortDescending
Quickly traverse the dictionary	kj_applyDictionaryValue:
Mapping	kj_mapDictionary:
Merge	kj_mergeDictionary:
Selector	kj_pickForKeys:
Remover	kj_omitForKeys:

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UIView

• Advanced Edition Rounded Corners and Border Extension.

Name	Signatures
Bezier Fillet	bezierRadius
Shadow Offset	shadowOffset
Shadow Opacity	shadowOpacity
Shadow Width	shadowWidth
Shadow rounded corners	shadowRadius
Shadow Color	shadowColor
Corner Radius	cornerRadius
Border Width	borderWidth
Border Color	borderColor
Image properties	viewImage
Top Controller	topViewController
Current Controller	viewController
Current Controller	kj_currentViewController
View created by Xib	kj_viewFromXib
View created by Xib	kj_viewFromXibWithFrame:
Fillet radius	kj_radius
Rounded corner orientation	kj_rectCorner
Border Color	kj_borderColor
Border width	kj_borderWidth
Border Orientation	kj_borderOrientation
Size	size
Location	origin
x coordinate	x
y coordinate	y
Width	width
Height	height
Center point x	centerX
Center point y	centerY
Left distance	left
Right distance	right
Top distance	top
Bottom distance	bottom
x + width	maxX
y + height	Property
After Masonry layout x	masonry_x
After Masonry layout y	masonry_y
Masonry width after layout	masonry_width
Masonry height after layout	masonry_height
Center the view in its parent view	kj_centerToSuperview
Distance from the right of the parent view	kj_rightToSuperview:
Distance from the bottom of the parent view	kj_bottomToSuperview:
Get the highest Y of the subview	kj_subviewMaxY
Get the highest X of the subview	kj_subviewMaxX
Find Subview	kj_FindSubviewRecursively:
Remove all subviews	kj_removeAllSubviews
Hide/Show all subviews	kj_hideSubviews:operation:
Child controls handle gesture events	kj_childHitTest:withEvent:

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UITextView

• UITextView undo processing, equivalent to command + z, limit processing.

Name	Signatures
Whether to enable the undo function	kOpenBackout
Cancel input	kj_textViewBackout
Placeholder text	placeHolder
Placeholder Label	placeHolderLabel
Limit word count	limitCount
Right margin of restricted area	limitMargin
Restricted area height	limitHeight
Statistics limit the number of words Label	limitLabel

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UITextField

• UITextField input box extension, placeholder, quick setting account password box.

Name	Signatures
Set the bottom border line color	bottomLineColor
Placeholder Color	placeholderColor
PlaceholderFontSize	placeholderFontSize
Maximum Length	maxLength
Clear text to dark text switch	securePasswords
Maximum character length reached	kMaxLengthBolck
Text editing moment callback	kTextEditingChangedBolck

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UILabel

• UILabel add long press copy function, Get text position and size.

Name	Signatures
Can copy	copyable
Remove copy long press gesture	kj_removeCopyLongPressGestureRecognizer
Set the display position of the text content	customTextAlignment
Get width	kj_calculateWidth
Get height	kj_calculateHeightWithWidth:
Get height, specify line height	kj_calculateHeightWithWidth:OneLineHeight:
The text line spacing between Ranges	kj_AttributedStringTextLineSpace:
Text size between ranges	kj_AttributedStringTextFont:Range:
Text color between Ranges	kj_AttributedStringTextColor:Range:
Text size and color between Ranges	kj_AttributedStringTextFont:TextColor:Range:
Text related attributes between Ranges	kj_AttributedStringTextAttributes:Range:
Rich text text size	kj_AttributedStringTextFont:Loc:Len:
Rich text text color	kj_AttributedStringTextColor:Loc:Len:
Rich text text size and color	kj_AttributedStringTextFont:TextColor:Loc:Len:
Rich text related attributes	kj_AttributedStringTextAttributes:Loc:Len:

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UIImage

• QR code and barcode generator, image size, screenshot and crop processing, Picture cropper.

Name	Signatures
Convert a string to a barcode	kj_barCodeImageWithContent:
Generate QR Code	kj_QRCodeImageWithContent:codeImageSize:
Generate QR Code with Specified Color	kj_QRCodeImageWithContent:codeImageSize:color:
Generate barcode	kj_barcodeImageWithContent:codeImageSize:
Generate barcode with specified color	kj_barcodeImageWithContent:codeImageSize:color:
Change the image size, bitmap mode	kj_bitmapChangeImageSize:
Change the internal pixel color of the image	kj_changeImagePixelColor:
Get network image size	kj_imageSizeWithURL:
Scale the image by scale	kj_scaleImage:
Scale the image with a fixed width	kj_scaleWithFixedWidth:
Scale the image with a fixed height	kj_scaleWithFixedHeight:
Change the image size proportionally	kj_cropImageWithAnySize:
Reduce the image size proportionally	kj_zoomImageWithMaxSize:
Do not pull up the filling image	kj_fitImageWithSize:
Screenshot of the current view	kj_captureScreen:
Specified location screen capture	kj_captureScreen:Rect:
Customized quality screenshots, quality multiples	kj_captureScreen:Rect:Quality:
Capture the current screen	kj_captureScreenWindow
Capture the long image of the scroll view	kj_captureScreenWithScrollView:ContentOffset:
Cut out the transparent part around the picture	kj_cutImageRoundAlphaZero:
Irregular graphics cutting	kj_anomalyCaptureImageWithView:BezierPath:
Polygon Cut Image	kj_polygonCaptureImageWithImageView:PointArray:
Specified area crop	kj_cutImageWithImage:Frame:
quartz 2d to achieve cropping	kj_quartzCutImageWithImage:Frame:
Image path clipping, clipping path "outside" part	kj_captureOuterImage:BezierPath:Rect:
Image path clipping, clipping path "within" part	kj_captureInnerImage:BezierPath:Rect:
Picture Rotation	kj_rotateInRadians:
Specified color linear blur	kj_blurImageWithTintColor:
Linear blur, keep transparent area	kj_linearBlurryImageBlur:
Blur processing	kj_blurImageWithRadius:Color:MaskImage:
Equalization calculation	kj_equalizationImage
Erosion	kj_erodeImage
Form expansion	kj_dilateImage
Multiple erosion	kj_erodeImageWithIterations:
Multiple expansion of form	kj_dilateImageWithIterations:
Gradient	kj_gradientImageWithIterations:
Top Hat Computing	kj_tophatImageWithIterations:
Black Hat Computing	kj_blackhatImageWithIterations:
Convolution processing	kj_convolutionImageWithKernel:
Sharpen	kj_sharpenImage
Relief	kj_embossImage
Gauss	kj_gaussianImage
Edge Detection	kj_marginImage

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UIDevice

• UIDevice system related operations.

Name	Signatures
App version number	appCurrentVersion
App Name	appName
Mobile UUID	deviceID
Get App Icon	appIcon
Get launch page image	launchImage
System startup map cache path	launchImageCachePath
Launch Image Backup File Path	launchImageBackupPath
Generate launch image	kj_launchImageWithPortrait:Dark:
Generate launch diagram	kj_launchImageWithStoryboard:Portrait:Dark:
Comparison version number	kj_comparisonVersion:
Jump to the specified URL	kj_openURL:
Call AppStore	kj_skipToAppStoreWithAppid:
Call the built-in browser safari	kj_skipToSafari
Call the built-in Mail	kj_skipToMail
Whether to switch to speaker	kj_changeLoudspeaker:
Save to Album	kj_savedPhotosAlbumWithImage:Complete:
System comes with sharing	kj_shareActivityWithItems:ViewController:Complete:
Switch Root View Controller	kj_changeRootViewController:Complete:

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UIColor

• UIColor related extension.

Name	Signatures
UIColor to hexadecimal string	kj_hexString
Hexadecimal string to UIColor	kj_colorWithHexString:
red	red
green	green
blue	blue
alpha	alpha
Hue	hue
Saturation	saturation
Brightness	light
Get the RGBA corresponding to the color	kj_colorGetRGBA
Get the average value of colors	kj_averageColors:
Vertical gradient color	kj_gradientVerticalToColor:height:
Horizontal gradient color	kj_gradientAcrossToColor:width:
Get the color of a specified point on the image	kj_colorAtImage:Point:

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UIButton

• UIButton click event block, mixed graphics and text, enlarge click.

Name	Signatures
Add click event	kj_addAction:
Click Event Interval	timeInterval
Expand the unified click field	enlargeClick
Graphic style	layoutType
Picture and text spacing	padding
The spacing of the graphic borders	periphery
Picture and text spacing	kj_contentLayout:padding:
Picture and text spacing	kj_contentLayout:padding:periphery:

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UISlider

• Rainbow gradient color slider.

Name	Signatures
Color array	colors
Location information corresponding to each color	locations
Color height	colorHeight
Border Width	borderWidth
Border Color	borderColor
Callback processing time	timeSpan
Current progress, for external kvo	progress
Moving block	movingWithTimeSpan:withBlock:
Moved block	moveEndBlock:
Reset UI	updateUI

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UIViewController

• Switch view controller.

Name	Signatures
Jump back to the specified controller	kj_popTargetViewController:complete:
Switch Root View Controller	kj_changeRootViewController:

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CocoaPods Install

Example import core module:
- pod 'KJCategories'

Example import UIBezierPath:
- pod 'KJCategories/UIKit/UIBezierPath'

Example import NSArray:
- pod 'KJCategories/Foundation/NSArray'

Example import opencv2 picture processing:
- pod 'KJCategories/Opencv'

Example import GradientSlider:
- pod 'KJCategories/Customized/GradientSlider'

---

Ex

• Download demo please execute first pod install

License

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