支持SPM，修改NSBundle+TZImagePicker.m以适配SPM安装

.swiftpm/xcode/package.xcworkspace/contents.xcworkspacedata

+<?xml version="1.0" encoding="UTF-8"?>
+<Workspace
+   version = "1.0">
+   <FileRef
+      location = "self:">
+   </FileRef>
+</Workspace>

Package.swift

+// swift-tools-version:5.3
+// The swift-tools-version declares the minimum version of Swift required to build this package.
+
+import PackageDescription
+
+let package = Package(
+    name: "TZImagePickerController",
+    platforms: [.iOS(.v8)],
+    products: [
+        // Products define the executables and libraries a package produces, and make them visible to other packages.
+        .library(
+            name: "TZImagePickerController",
+            targets: ["TZImagePickerController"]),
+    ],
+    dependencies: [
+        // Dependencies declare other packages that this package depends on.
+        // .package(url: /* package url */, from: "1.0.0"),
+    ],
+    targets: [
+        // Targets are the basic building blocks of a package. A target can define a module or a test suite.
+        // Targets can depend on other targets in this package, and on products in packages this package depends on.
+        .target(
+            name: "TZImagePickerController",
+            path: "TZImagePickerController/TZImagePickerController",
+            resources: [.process("TZImagePickerController.bundle")],
+            publicHeadersPath: ".",
+            cSettings: [
+                .define("TZ_SPM")
+            ]
+        )
+    ]
+)

TZImagePickerController/TZImagePickerController/NSBundle+TZImagePicker.m

@@ -12,7 +12,11 @@
 @implementation NSBundle (TZImagePicker)
 
 + (NSBundle *)tz_imagePickerBundle {
+#ifdef TZ_SPM
+    NSBundle *bundle = SWIFTPM_MODULE_BUNDLE;
+#else
     NSBundle *bundle = [NSBundle bundleForClass:[TZImagePickerController class]];
+#endif
     NSURL *url = [bundle URLForResource:@"TZImagePickerController" withExtension:@"bundle"];
     bundle = [NSBundle bundleWithURL:url];
     return bundle;