掘金

SFCSBView

iOS UIView Subclass: Use CoreGraphics to control the direction of Rect Corner、Shadow 、Border

Example

// UIAppearance
[SFCSBView appearance].cornerRadius = 20;
[SFCSBView appearance].rectCornner = UIRectCornerAllCorners;
[SFCSBView appearance].shadowPosition = UIShadowPostionAll;
[SFCSBView appearance].shadowRadius = 20;
[SFCSBView appearance].borderColor = [UIColor systemBlueColor];
[SFCSBView appearance].borderWidth = 5;
[SFCSBView appearance].borderPosition = UIBorderPostionAll;


SFCSBView * shadowView = [SFCSBView new];
shadowView.cornerRadius = 20;
shadowView.rectCornner = UIRectCornerAllCorners;
shadowView.shadowPosition = UIShadowPostionAll;
shadowView.shadowColor = [[UIColor blackColor]colorWithAlphaComponent:0.6];
shadowView.shadowRadius = 20;
shadowView.borderColor = UIColor.systemBlueColor;
shadowView.borderWidth = 5;
shadowView.borderPosition = UIBorderPostionAll;

Features

1. Surpport xib / storyboard

2. Using them freedomly

3. Create and process image

for objc:

// Generate UIImage by color or gradient colors, then start UIImage process flow
UIColor.lightGrayColor.sf_flow.corner(10, UIRectCornerAllCorners).border(0.5, UIColor.blackColor).image;
@[UIColor.redColor,UIColor.purpleColor].sf_gradientFlow(YES,self.gradientButton.frame.size).corner(10, UIRectCornerTopLeft|UIRectCornerBottomRight).border(1, UIColor.blackColor).image

// UIImage Process Flow
[UIImage new].sf_flow.circle.resize(CGSizeMake(40, 40)).blur(SFBlurEffectLight).corner(10, UIRectEdgeAll).border(1, UIColor.redColor)

for swift:

let _ = UIColor.red
            .sf_flow(with: CGSize.init(width: 40, height: 40))
            .blur(with: SFBlurEffectLight)
            .border(withWidth: 1, color: .gray)
            .shadow(with: UIColor.black.withAlphaComponent(0.5), offset: .init(width: 10, height: 10), blurRadius: 10)
            .resize(with: .init(width: 20, height: 20))
            .circle
            .image();

CocoaPods

pod 'SFImageMaker'

Preview

Compare with CALayer

Random Cells

Performance

1000 shadow images only need 29MB and 1.01s

In this condition, maximum cpu occupancy rates is 45% and 60FPS when the count of cell is 1000 and quick slide，use iPhone 7, iOS13.3.1.

In extreme cases，no reuse, maximum cpu occupancy rates is 140% and 60FPS when the count of cell is 1000 and quick slide.