获取所有本机类的列表

我想获得我已加载到iOS项目中的所有本机类（NSString，NSNumber，int，float，NSSet，NSDictionary）。

即，如果我创建了一个名为“TestClass”的自定义类，我不希望它列出…

我已经有了一个代码，但它返回了所有类的名称，我可以修改代码，只将列表限制为Native类？

#import  #import  #import  unsigned int count; const char **classes; Dl_info info; dladdr(&_mh_execute_header, &info); classes = objc_copyClassNamesForImage(info.dli_fname, &count); for (int i = 0; i < count; i++) { NSLog(@"Class name: %s", classes[i]); Class class = NSClassFromString ([NSString stringWithCString:classes[i] encoding:NSUTF8StringEncoding]); // Do something with class } 

Answer 1

您将获得所有已加载的类

 int numClasses; Class * classes = NULL; classes = NULL; numClasses = objc_getClassList(NULL, 0); if (numClasses > 0 ) { classes = (__unsafe_unretained Class *)malloc(sizeof(Class) * numClasses); numClasses = objc_getClassList(classes, numClasses); for (int i = 0; i < numClasses; i++) { Class c = classes[i]; NSLog(@"%s", class_getName(c)); } free(classes); } 

（来自objc_getClassList文档的代码。）

要限制列表，可以检查从中加载类的包 ，例如

 Class c = classes[i]; NSBundle *b = [NSBundle bundleForClass:c]; if (b != [NSBundle mainBundle]) ... 

对于未从您的应用程序加载的所有类。

Answer 2

这是Swift 3的纯Swift解决方案：

 var numClasses: Int32 = 0 var allClasses: AutoreleasingUnsafeMutablePointer? = nil defer { allClasses = nil } numClasses = objc_getClassList(nil, 0) if numClasses > 0 { var ptr = UnsafeMutablePointer.allocate(capacity: Int(numClasses)) defer { ptr.deinitialize() ptr.deallocate(capacity: Int(numClasses)) } allClasses = AutoreleasingUnsafeMutablePointer(ptr) numClasses = objc_getClassList(allClasses, numClasses) for i in 0 ..< numClasses { if let currentClass: AnyClass = allClasses?[Int(i)] { print("\(currentClass)") } } } 

使用Swift 2.2 / Xcode 7.3的原始解决方案：

 var numClasses: Int32 = 0 var allClasses: AutoreleasingUnsafeMutablePointer = nil defer { allClasses = nil } numClasses = objc_getClassList(nil, 0) if numClasses > 0 { var ptr = UnsafeMutablePointer.alloc(Int(numClasses)) defer { ptr.destroy() ptr.dealloc(Int(numClasses)) ptr = nil } allClasses = AutoreleasingUnsafeMutablePointer.init(ptr) numClasses = objc_getClassList(allClasses, numClasses) for i in 0 ..< numClasses { if let currentClass: AnyClass = allClasses[Int(i)] { print("\(currentClass)") } } } 

请注意，由于Swift处理弱指针的方式（protip：它没有），你的类将被这个代码过度释放。 我打开了SR-1068关于桥接__weak和__unsafe_unretained指向Swift的指针。 __weak指针被桥接为UnsafeMutablePointer而__unsafe_unretained指针被桥接为AutoreleasingUnsafeMutablePointer ，这会导致overrelase。

幸运的是， Classes在发布时没有做任何事情 ，所以这段代码相对安全，至少目前如此。