Set up example collection view

Examples/ImagesExample/ImagesExample.xcodeproj/project.pbxproj

@@ -9,11 +9,10 @@
 /* Begin PBXBuildFile section */
 		F4EC51C421D33B6900DED569 /* AppDelegate.swift in Sources */ = {isa = PBXBuildFile; fileRef = F4EC51C321D33B6900DED569 /* AppDelegate.swift */; };
 		F4EC51C621D33B6900DED569 /* ViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = F4EC51C521D33B6900DED569 /* ViewController.swift */; };
-		F4EC51C921D33B6900DED569 /* Main.storyboard in Resources */ = {isa = PBXBuildFile; fileRef = F4EC51C721D33B6900DED569 /* Main.storyboard */; };
 		F4EC51CB21D33B6B00DED569 /* Assets.xcassets in Resources */ = {isa = PBXBuildFile; fileRef = F4EC51CA21D33B6B00DED569 /* Assets.xcassets */; };
 		F4EC51CE21D33B6B00DED569 /* LaunchScreen.storyboard in Resources */ = {isa = PBXBuildFile; fileRef = F4EC51CC21D33B6B00DED569 /* LaunchScreen.storyboard */; };
 		F4EC51D921D33B6B00DED569 /* ImagesExampleTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = F4EC51D821D33B6B00DED569 /* ImagesExampleTests.swift */; };
-		F4EC51F021D33C1800DED569 /* PlaceholderKit.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = F4EC51E921D33B7D00DED569 /* PlaceholderKit.framework */; };
+		F4EC51F721D36DE100DED569 /* PlaceholderKit.framework in Embed Frameworks */ = {isa = PBXBuildFile; fileRef = F4EC51E921D33B7D00DED569 /* PlaceholderKit.framework */; settings = {ATTRIBUTES = (CodeSignOnCopy, RemoveHeadersOnCopy, ); }; };
 /* End PBXBuildFile section */
 
 /* Begin PBXContainerItemProxy section */
@@ -38,13 +37,33 @@
 			remoteGlobalIDString = F444B67921C104460042E6F2;
 			remoteInfo = PlaceholderKitTests;
 		};
+		F4EC51F821D36DE100DED569 /* PBXContainerItemProxy */ = {
+			isa = PBXContainerItemProxy;
+			containerPortal = F4EC51E321D33B7D00DED569 /* PlaceholderKit.xcodeproj */;
+			proxyType = 1;
+			remoteGlobalIDString = F444B66F21C104460042E6F2;
+			remoteInfo = PlaceholderKit;
+		};
 /* End PBXContainerItemProxy section */
 
+/* Begin PBXCopyFilesBuildPhase section */
+		F4EC51FA21D36DE200DED569 /* Embed Frameworks */ = {
+			isa = PBXCopyFilesBuildPhase;
+			buildActionMask = 2147483647;
+			dstPath = "";
+			dstSubfolderSpec = 10;
+			files = (
+				F4EC51F721D36DE100DED569 /* PlaceholderKit.framework in Embed Frameworks */,
+			);
+			name = "Embed Frameworks";
+			runOnlyForDeploymentPostprocessing = 0;
+		};
+/* End PBXCopyFilesBuildPhase section */
+
 /* Begin PBXFileReference section */
 		F4EC51C021D33B6900DED569 /* ImagesExample.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = ImagesExample.app; sourceTree = BUILT_PRODUCTS_DIR; };
 		F4EC51C321D33B6900DED569 /* AppDelegate.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = AppDelegate.swift; sourceTree = "<group>"; };
 		F4EC51C521D33B6900DED569 /* ViewController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ViewController.swift; sourceTree = "<group>"; };
-		F4EC51C821D33B6900DED569 /* Base */ = {isa = PBXFileReference; lastKnownFileType = file.storyboard; name = Base; path = Base.lproj/Main.storyboard; sourceTree = "<group>"; };
 		F4EC51CA21D33B6B00DED569 /* Assets.xcassets */ = {isa = PBXFileReference; lastKnownFileType = folder.assetcatalog; path = Assets.xcassets; sourceTree = "<group>"; };
 		F4EC51CD21D33B6B00DED569 /* Base */ = {isa = PBXFileReference; lastKnownFileType = file.storyboard; name = Base; path = Base.lproj/LaunchScreen.storyboard; sourceTree = "<group>"; };
 		F4EC51CF21D33B6B00DED569 /* Info.plist */ = {isa = PBXFileReference; lastKnownFileType = text.plist.xml; path = Info.plist; sourceTree = "<group>"; };
@@ -59,7 +78,6 @@
 			isa = PBXFrameworksBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
-				F4EC51F021D33C1800DED569 /* PlaceholderKit.framework in Frameworks */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
@@ -98,7 +116,6 @@
 			children = (
 				F4EC51C321D33B6900DED569 /* AppDelegate.swift */,
 				F4EC51C521D33B6900DED569 /* ViewController.swift */,
-				F4EC51C721D33B6900DED569 /* Main.storyboard */,
 				F4EC51CA21D33B6B00DED569 /* Assets.xcassets */,
 				F4EC51CC21D33B6B00DED569 /* LaunchScreen.storyboard */,
 				F4EC51CF21D33B6B00DED569 /* Info.plist */,
@@ -141,10 +158,12 @@
 				F4EC51BC21D33B6900DED569 /* Sources */,
 				F4EC51BD21D33B6900DED569 /* Frameworks */,
 				F4EC51BE21D33B6900DED569 /* Resources */,
+				F4EC51FA21D36DE200DED569 /* Embed Frameworks */,
 			);
 			buildRules = (
 			);
 			dependencies = (
+				F4EC51F921D36DE100DED569 /* PBXTargetDependency */,
 			);
 			name = ImagesExample;
 			productName = ImagesExample;
@@ -237,7 +256,6 @@
 			files = (
 				F4EC51CE21D33B6B00DED569 /* LaunchScreen.storyboard in Resources */,
 				F4EC51CB21D33B6B00DED569 /* Assets.xcassets in Resources */,
-				F4EC51C921D33B6900DED569 /* Main.storyboard in Resources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
@@ -276,17 +294,14 @@
 			target = F4EC51BF21D33B6900DED569 /* ImagesExample */;
 			targetProxy = F4EC51D521D33B6B00DED569 /* PBXContainerItemProxy */;
 		};
+		F4EC51F921D36DE100DED569 /* PBXTargetDependency */ = {
+			isa = PBXTargetDependency;
+			name = PlaceholderKit;
+			targetProxy = F4EC51F821D36DE100DED569 /* PBXContainerItemProxy */;
+		};
 /* End PBXTargetDependency section */
 
 /* Begin PBXVariantGroup section */
-		F4EC51C721D33B6900DED569 /* Main.storyboard */ = {
-			isa = PBXVariantGroup;
-			children = (
-				F4EC51C821D33B6900DED569 /* Base */,
-			);
-			name = Main.storyboard;
-			sourceTree = "<group>";
-		};
 		F4EC51CC21D33B6B00DED569 /* LaunchScreen.storyboard */ = {
 			isa = PBXVariantGroup;
 			children = (
@@ -417,6 +432,7 @@
 		F4EC51DE21D33B6B00DED569 /* Debug */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				ALWAYS_EMBED_SWIFT_STANDARD_LIBRARIES = YES;
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				CODE_SIGN_STYLE = Automatic;
 				DEVELOPMENT_TEAM = T3LQ95726F;
@@ -435,6 +451,7 @@
 		F4EC51DF21D33B6B00DED569 /* Release */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				ALWAYS_EMBED_SWIFT_STANDARD_LIBRARIES = YES;
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				CODE_SIGN_STYLE = Automatic;
 				DEVELOPMENT_TEAM = T3LQ95726F;

Examples/ImagesExample/ImagesExample/AppDelegate.swift

@@ -16,6 +16,11 @@ class AppDelegate: UIResponder, UIApplicationDelegate {
 
     func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
         // Override point for customization after application launch.
+        window = UIWindow(frame: UIScreen.main.bounds)
+        let controller = ViewController()
+        window?.rootViewController = controller
+        window?.makeKeyAndVisible()
+
         return true
     }
 

Examples/ImagesExample/ImagesExample/Base.lproj/Main.storyboard

@@ -1,24 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="13122.16" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" useSafeAreas="YES" colorMatched="YES" initialViewController="BYZ-38-t0r">
-    <dependencies>
-        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="13104.12"/>
-        <capability name="Safe area layout guides" minToolsVersion="9.0"/>
-        <capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
-    </dependencies>
-    <scenes>
-        <!--View Controller-->
-        <scene sceneID="tne-QT-ifu">
-            <objects>
-                <viewController id="BYZ-38-t0r" customClass="ViewController" customModuleProvider="target" sceneMemberID="viewController">
-                    <view key="view" contentMode="scaleToFill" id="8bC-Xf-vdC">
-                        <rect key="frame" x="0.0" y="0.0" width="375" height="667"/>
-                        <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
-                        <color key="backgroundColor" red="1" green="1" blue="1" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
-                        <viewLayoutGuide key="safeArea" id="6Tk-OE-BBY"/>
-                    </view>
-                </viewController>
-                <placeholder placeholderIdentifier="IBFirstResponder" id="dkx-z0-nzr" sceneMemberID="firstResponder"/>
-            </objects>
-        </scene>
-    </scenes>
-</document>

Examples/ImagesExample/ImagesExample/Info.plist

@@ -22,8 +22,6 @@
 	<true/>
 	<key>UILaunchStoryboardName</key>
 	<string>LaunchScreen</string>
-	<key>UIMainStoryboardFile</key>
-	<string>Main</string>
 	<key>UIRequiredDeviceCapabilities</key>
 	<array>
 		<string>armv7</string>

Examples/ImagesExample/ImagesExample/ViewController.swift

@@ -10,16 +10,105 @@ import UIKit
 import PlaceholderKit
 
 class ViewController: UIViewController {
+    var sampleImagesCollectionViewController: SampleImagesCollectionViewController?
+    lazy var images: [UIImage] = {
+        return [
+            PlaceholderBuilder().coloredBackground(color: .red, size: CGSize(width: 100, height: 100)),
+            PlaceholderBuilder().coloredBackground(color: .blue, size: CGSize(width: 100, height: 100)),
+            PlaceholderBuilder().coloredBackground(color: .green, size: CGSize(width: 100, height: 100)),
+            PlaceholderBuilder().coloredBackground(color: .yellow, size: CGSize(width: 100, height: 100)),
+            ].compactMap({$0})
+    }()
 
     override func viewDidLoad() {
         super.viewDidLoad()
-        let settings = PlaceholderSettings(size: CGSize(width: 320, height: 640),
+        view.backgroundColor = UIColor(red: 0.3, green: 0.3, blue: 0.3, alpha: 1.0)
-                                           background: .solidColor(UIColor.red),
+        setupCollectionViewController()
-                                           showDimensionAsText: true,
+    }
-                                           convertDimensionToAspectRatio: false)
+
-        let factory = PlaceholderFactory(settings: settings)
+    func setupCollectionViewController() {
-        let image = factory.createPlaceholder()
+        let controller = SampleImagesCollectionViewController(data: images)
-        print(image)
+        guard let collectionView = controller.view else { return }
+
+        collectionView.translatesAutoresizingMaskIntoConstraints = false
+        view.addSubview(collectionView)
+        sampleImagesCollectionViewController = controller
+
+        NSLayoutConstraint.activate([
+            collectionView.leadingAnchor.constraint(equalTo: view.safeAreaLayoutGuide.leadingAnchor, constant: 30),
+            collectionView.trailingAnchor.constraint(equalTo: view.safeAreaLayoutGuide.trailingAnchor, constant: -30),
+            collectionView.bottomAnchor.constraint(equalTo: view.safeAreaLayoutGuide.bottomAnchor, constant: -30),
+            collectionView.topAnchor.constraint(equalTo: view.safeAreaLayoutGuide.topAnchor, constant: 30)
+        ])
+    }
+}
+
+class SampleImagesCollectionViewController: UICollectionViewController {
+    let data: [UIImage]
+
+    init(data: [UIImage]) {
+        self.data = data
+        let layout = UICollectionViewFlowLayout()
+        layout.itemSize = CGSize(width: 200, height: 200)
+        layout.scrollDirection = .vertical
+
+        super.init(collectionViewLayout: layout)
+    }
+
+    required init?(coder aDecoder: NSCoder) {
+        fatalError("init(coder:) has not been implemented")
+    }
+
+    override func viewDidLoad() {
+        super.viewDidLoad()
+        collectionView.register(SampleImageCollectionViewCell.self, forCellWithReuseIdentifier: SampleImageCollectionViewCell.reuseIdentifier)
+        collectionView.backgroundColor = .clear
+    }
+
+    override func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
+        return data.count
+    }
+
+    override func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
+
+        let cell = collectionView.dequeueReusableCell(withReuseIdentifier: SampleImageCollectionViewCell.reuseIdentifier,
+                                                      for: indexPath)
+
+        guard let castedCell = cell as? SampleImageCollectionViewCell else {
+            return cell
+        }
+
+        castedCell.imageView.image = data[indexPath.row]
+
+        return castedCell
+    }
+}
+
+class SampleImageCollectionViewCell: UICollectionViewCell {
+    static let reuseIdentifier = "SampleImagesCell"
+
+    lazy var imageView: UIImageView = {
+        let imageView = UIImageView()
+        imageView.translatesAutoresizingMaskIntoConstraints = false
+        imageView.contentMode = .scaleAspectFit
+        return imageView
+    }()
+
+    override init(frame: CGRect) {
+        super.init(frame: frame)
+
+        translatesAutoresizingMaskIntoConstraints = false
+        addSubview(imageView)
+        NSLayoutConstraint.activate([
+            imageView.topAnchor.constraint(equalTo: topAnchor),
+            imageView.bottomAnchor.constraint(equalTo: bottomAnchor),
+            imageView.leadingAnchor.constraint(equalTo: leadingAnchor),
+            imageView.trailingAnchor.constraint(equalTo: trailingAnchor)
+        ])
+    }
+
+    required init?(coder aDecoder: NSCoder) {
+        fatalError("init(coder:) has not been implemented")
     }
 }
 

PlaceholderKit.xcodeproj/project.pbxproj

@@ -384,8 +384,8 @@
 			baseConfigurationReference = F444B68D21C104900042E6F2 /* Universal-Framework-Target.xcconfig */;
 			buildSettings = {
 				CLANG_ENABLE_MODULES = YES;
-				CODE_SIGN_IDENTITY = "-";
+				CODE_SIGN_IDENTITY = "Mac Developer";
-				CODE_SIGN_STYLE = Automatic;
+				CODE_SIGN_STYLE = Manual;
 				COMBINE_HIDPI_IMAGES = YES;
 				DEFINES_MODULE = YES;
 				DEVELOPMENT_TEAM = T3LQ95726F;
@@ -395,6 +395,7 @@
 				FRAMEWORK_VERSION = A;
 				INFOPLIST_FILE = "$(SRCROOT)/Supporting Files/Framework-Info.plist";
 				INSTALL_PATH = "$(LOCAL_LIBRARY_DIR)/Frameworks";
+				IPHONEOS_DEPLOYMENT_TARGET = 10.0;
 				LD_RUNPATH_SEARCH_PATHS = (
 					"$(inherited)",
 					"@executable_path/Frameworks",
@@ -402,6 +403,7 @@
 				);
 				PRODUCT_BUNDLE_IDENTIFIER = com.shaopinglee.PlaceholderKit;
 				PRODUCT_NAME = "$(TARGET_NAME:c99extidentifier)";
+				PROVISIONING_PROFILE_SPECIFIER = "";
 				SDKROOT = "";
 				SKIP_INSTALL = YES;
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
@@ -414,8 +416,8 @@
 			baseConfigurationReference = F444B68D21C104900042E6F2 /* Universal-Framework-Target.xcconfig */;
 			buildSettings = {
 				CLANG_ENABLE_MODULES = YES;
-				CODE_SIGN_IDENTITY = "-";
+				CODE_SIGN_IDENTITY = "Mac Developer";
-				CODE_SIGN_STYLE = Automatic;
+				CODE_SIGN_STYLE = Manual;
 				COMBINE_HIDPI_IMAGES = YES;
 				DEFINES_MODULE = YES;
 				DEVELOPMENT_TEAM = T3LQ95726F;
@@ -425,6 +427,7 @@
 				FRAMEWORK_VERSION = A;
 				INFOPLIST_FILE = "$(SRCROOT)/Supporting Files/Framework-Info.plist";
 				INSTALL_PATH = "$(LOCAL_LIBRARY_DIR)/Frameworks";
+				IPHONEOS_DEPLOYMENT_TARGET = 10.0;
 				LD_RUNPATH_SEARCH_PATHS = (
 					"$(inherited)",
 					"@executable_path/Frameworks",
@@ -432,6 +435,7 @@
 				);
 				PRODUCT_BUNDLE_IDENTIFIER = com.shaopinglee.PlaceholderKit;
 				PRODUCT_NAME = "$(TARGET_NAME:c99extidentifier)";
+				PROVISIONING_PROFILE_SPECIFIER = "";
 				SDKROOT = "";
 				SKIP_INSTALL = YES;
 				SWIFT_VERSION = 4.2;
@@ -444,8 +448,8 @@
 			buildSettings = {
 				ALWAYS_EMBED_SWIFT_STANDARD_LIBRARIES = YES;
 				CLANG_ENABLE_MODULES = YES;
-				CODE_SIGN_IDENTITY = "-";
+				CODE_SIGN_IDENTITY = "Mac Developer";
-				CODE_SIGN_STYLE = Automatic;
+				CODE_SIGN_STYLE = Manual;
 				COMBINE_HIDPI_IMAGES = YES;
 				DEVELOPMENT_TEAM = T3LQ95726F;
 				INFOPLIST_FILE = "$(SRCROOT)/Supporting Files/FrameworkTests-Info.plist";
@@ -456,6 +460,7 @@
 				);
 				PRODUCT_BUNDLE_IDENTIFIER = com.shaopinglee.PlaceholderKitTests;
 				PRODUCT_NAME = "$(TARGET_NAME)";
+				PROVISIONING_PROFILE_SPECIFIER = "";
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
 				SWIFT_VERSION = 4.2;
 			};
@@ -467,8 +472,8 @@
 			buildSettings = {
 				ALWAYS_EMBED_SWIFT_STANDARD_LIBRARIES = YES;
 				CLANG_ENABLE_MODULES = YES;
-				CODE_SIGN_IDENTITY = "-";
+				CODE_SIGN_IDENTITY = "Mac Developer";
-				CODE_SIGN_STYLE = Automatic;
+				CODE_SIGN_STYLE = Manual;
 				COMBINE_HIDPI_IMAGES = YES;
 				DEVELOPMENT_TEAM = T3LQ95726F;
 				INFOPLIST_FILE = "$(SRCROOT)/Supporting Files/FrameworkTests-Info.plist";
@@ -479,6 +484,7 @@
 				);
 				PRODUCT_BUNDLE_IDENTIFIER = com.shaopinglee.PlaceholderKitTests;
 				PRODUCT_NAME = "$(TARGET_NAME)";
+				PROVISIONING_PROFILE_SPECIFIER = "";
 				SWIFT_VERSION = 4.2;
 			};
 			name = Release;

Sources/PlaceholderKit/NSImage+Placeholder.swift

@@ -10,7 +10,7 @@
 import AppKit
 
 extension NSImage {
-    static func createPlaceholder(withColor color: NSColor, size: CGSize) -> NSImage? {
+    static func image(withColor color: NSColor, size: CGSize) -> NSImage? {
         let image = NSImage(size: size)
         image.lockFocus()
         color.drawSwatch(in: NSMakeRect(0, 0, size.width, size.height))

Sources/PlaceholderKit/PlaceholderKit.swift

@@ -16,21 +16,26 @@ public typealias Color = UIColor
 public typealias Image = UIImage
 #endif
 
-public struct PlaceholderFactory {
+public struct Placeholder {
-    let settings: PlaceholderSettings
+    let size: CGSize
+    let backgroundStyle: BackgroundStyle
 
-    public func createPlaceholder() -> Image? {
+    public init(size: CGSize, backgroundStyle: BackgroundStyle) {
-        switch settings.background {
+        self.size = size
-        case .solidColor(let color):
+        self.backgroundStyle = backgroundStyle
-            return Image.createPlaceholder(withColor: color, size: settings.size)
+    }
-        case .image:
+}
-            return nil
+
-        }
+public struct PlaceholderBuilder {
+    public func coloredBackground(color: UIColor, size: CGSize) -> Image? {
+        return Image.image(withColor: color, size: size)
     }
 
-    public init(settings: PlaceholderSettings) {
+    public func imageBackground(image: UIImage, size: CGSize, tiled: Bool = false) -> Image? {
-        self.settings = settings
+        return nil
     }
+
+    public init() {}
 }
 
 public struct PlaceholderSettings {

Sources/PlaceholderKit/UIImage+Placeholder.swift

@@ -10,16 +10,14 @@
 import UIKit
 
 extension UIImage {
-    static func createPlaceholder(withColor color: UIColor, size: CGSize) -> UIImage? {
+    static func image(withColor color: UIColor, size: CGSize) -> UIImage? {
-        let rect = CGRect(origin: .zero, size: size)
+        let renderer = UIGraphicsImageRenderer(size: size)
-        UIGraphicsBeginImageContextWithOptions(rect.size, false, 1.0)
+        let image = renderer.image { context in
-        color.setFill()
+            color.setFill()
-        UIRectFill(rect)
+            context.fill(CGRect(origin: .zero, size: size))
-        let image = UIGraphicsGetImageFromCurrentImageContext()
+        }
-        UIGraphicsEndImageContext()
 
-        guard let cgImage = image?.cgImage else { return nil }
+        return image
-        return UIImage(cgImage: cgImage)
     }
 }
 

Supporting Files/Configurations/Deployment-Targets.xcconfig

@@ -1,2 +1,2 @@
-IPHONEOS_DEPLOYMENT_TARGET = 8.0
+IPHONEOS_DEPLOYMENT_TARGET = 10.0
 MACOSX_DEPLOYMENT_TARGET = 10.11