Swift的圖片處理類：Toucan

Toucan 是一個 Swift 庫，提供整潔，快速的 API 來處理圖片。可以大大簡化圖片的生成，支持縮放，裁剪和美化。

特性

• 簡單和智能大小調整
• Elliptical and rounded rect masking
• Mask with custom images
• Chainable image processing stages

調整大小

Resize the contained image to the specified size. Depending on whatfitModeis supplied, the image may be clipped, cropped or scaled.

Toucan(image: myImage).resize(size: CGSize, fitMode: Toucan.Resize.FitMode)
or
Toucan.Resize.resizeImage(image: UIImage, size: CGSize, fitMode: FitMode = .Clip) -> UIImage

Fit Mode

FitMode drives the resizing process to determine what to do with an image to make it fit the given size bounds.

Example	Mode
	Clip Mode Toucan.Resize.FitMode.Clip Resizes the image to fit within the width and height boundaries without cropping or distorting the image. Toucan(image: portraitImage).resize(CGSize(width: 500, height: 500), fitMode: Toucan.Resize.FitMode.Clip).image
	Crop Mode Toucan.Resize.FitMode.Crop Resizes the image to fill the width and height boundaries and crops any excess image data. Toucan(image: portraitImage).resize(CGSize(width: 500, height: 500), fitMode: Toucan.Resize.FitMode.Crop).image
	Scale Mode Toucan.Resize.FitMode.Scale Scales the image to fit the constraining dimensions exactly. Toucan(image: portraitImage).resize(CGSize(width: 500, height: 500), fitMode: Toucan.Resize.FitMode.Scale).image

Masking

Alter the original image with a mask; supports ellipse, rounded rect and image masks.

Ellipse Mask

Example	Function
	Mask the given image with an ellipse. Allows specifying an additional border to draw on the clipped image. For a circle, ensure the image width and height are equal! Toucan(image: myImage).maskWithEllipse().image or Toucan.Mask.maskImageWithEllipse(myImage) -> UIImage
	When specifying a border width, it is draw on the clipped image. Toucan(image: myImage).maskWithEllipse(borderWidth: 10, borderColor: UIColor.yellowColor()).image or Toucan.Mask.maskImageWithEllipse(myImage, borderWidth: 10, borderColor: UIColor.yellowColor()) -> UIImage

Rounded Rect Mask

Example	Function
	Mask the given image with a rounded rectangle border. Allows specifying an additional border to draw on the clipped image. Toucan(image: myImage).maskWithRoundedRect(cornerRadius: 30).image or Toucan.Mask.maskImageWithRoundedRect(myImage, cornerRadius: 30) -> UIImage
	When specifying a border width, it is draw on the clipped rounded rect. Toucan(image: myImage).maskWithRoundedRect(cornerRadius: 30, borderWidth: 10, borderColor: UIColor.purpleColor()).image or Toucan.Mask.maskImageWithRoundedRect(myImage, cornerRadius: 30, borderWidth: 10, borderColor: UIColor.purpleColor()) -> UIImage

Image Mask

Example

Function

Mask the given image with another image mask. Note that the areas in the original image that correspond to the black areas of the mask show through in the resulting image. The areas that correspond to the white areas of the mask aren’t painted. The areas that correspond to the gray areas in the mask are painted using an intermediate alpha value that’s equal to 1 minus the image mask sample value. Toucan(image: myImage).maskWithImage(maskImage: octagonMask).image or Toucan.Mask.maskImageWithImage(myImage, maskImage: octagonMask) -> UIImage

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