6

我想获取已加载到我的 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......

我已经有一个代码，但它返回加载的所有类的名称我可以修改代码以将列表限制为仅本地类？

#import <objc/runtime.h>
#import <dlfcn.h>
#import <mach-o/ldsyms.h>


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

}
4

3 回答 3

7

你会得到所有加载的类

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，您可以检查加载类的包，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。

于 2013-10-10T15:04:30.267 回答
6

这是使用 Swift 3 的纯 Swift 解决方案：

var numClasses: Int32 = 0
var allClasses: AutoreleasingUnsafeMutablePointer<AnyClass?>? = nil
defer {
    allClasses = nil
}

numClasses = objc_getClassList(nil, 0)

if numClasses > 0 {
    var ptr = UnsafeMutablePointer<AnyClass?>.allocate(capacity: Int(numClasses))
    defer {
        ptr.deinitialize()
        ptr.deallocate(capacity: Int(numClasses))
    }
    allClasses = AutoreleasingUnsafeMutablePointer<AnyClass?>(ptr)
    numClasses = objc_getClassList(allClasses, numClasses)

    for i in 0 ..< numClasses {
        if let currentClass: AnyClass = allClasses?[Int(i)] {
            print("\(currentClass)")
        }
    }
}

Swift 2.2/Xcode 7.3 的原始解决方案：

var numClasses: Int32 = 0
var allClasses: AutoreleasingUnsafeMutablePointer<AnyClass?> = nil
defer {
    allClasses = nil
}

numClasses = objc_getClassList(nil, 0)

if numClasses > 0 {
    var ptr = UnsafeMutablePointer<AnyClass>.alloc(Int(numClasses))
    defer {
        ptr.destroy()
        ptr.dealloc(Int(numClasses))
        ptr = nil
    }
    allClasses = AutoreleasingUnsafeMutablePointer<AnyClass?>.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），您的类将被此代码过度释放。我已经打开了关于Swift 的桥接和指针的SR-1068 。指针桥接为 ，而指针桥接为，这会导致过度释放。__weak__unsafe_unretained__weakUnsafeMutablePointer__unsafe_unretainedAutoreleasingUnsafeMutablePointer

幸运的是，类在发布时不做任何事情，所以这段代码是相对安全的，至少目前是这样。

于 2016-03-23T14:42:46.727 回答
0

使用运行时可以：

Objective-C

#import <objc/runtime.h>

- (void) printClassNames {
    int amountClasses = objc_getClassList(NULL, 0);
    printf("Amount of classes: %d", amountClasses);

    Class *classes = (__unsafe_unretained Class *)malloc(sizeof(Class) * amountClasses);
    amountClasses = objc_getClassList(classes, amountClasses);

    for (int i = 0; i < amountClasses; i++) {
        Class class = classes[i];

        if ([NSBundle bundleForClass:class] != [NSBundle mainBundle]) { // restriction that pass classes from main bundle
            continue;
        }

        printf("Class name: %s", class_getName(class));

        [self printPropertyNamesForClass:class];
        [self printMethodNamesForClass:class];

    }

    free(classes);
}

- (void) printPropertyNamesForClass:(Class) class {
    uint count;
    objc_property_t* properties = class_copyPropertyList(class, &count);

    for (int i = 0; i < count ; i++) {

        const char* propertyName = property_getName(properties[i]);
        printf("\t Property name: %s \n", propertyName);
    }
    free(properties);
}

- (void) printMethodNamesForClass:(Class) class {
    //List of all methods
    unsigned int amountMethod = 0;
    Method *methods = class_copyMethodList(class, &amountMethod);

    for (unsigned int i = 0; i < amountMethod; i++) {
        Method method = methods[i];

        printf("\t method named:'%s' \n", sel_getName(method_getName(method)));
    }

    free(methods);
}

迅速

func printClassNames() {

    let amountClasses = objc_getClassList(nil, 0)
    print("Amount of classes: \(amountClasses)")

    var classes = [AnyClass](repeating: NSObject.self, count: Int(amountClasses))
    classes.withUnsafeMutableBufferPointer { buffer in
        let autoreleasingPointer = AutoreleasingUnsafeMutablePointer<AnyClass>(buffer.baseAddress)
        objc_getClassList(autoreleasingPointer, amountClasses)
    }

    for currentClass in classes {

        guard Bundle(for: currentClass) == Bundle.main else {continue}
        print("Class name:\(currentClass)")

        printPropertyNamesForClass(currentClass)
        printMethodNamesForClass(currentClass)
    }

}

func printPropertyNamesForClass(_ currentClass : AnyClass) {
    var count = UInt32()
    let propertyList = class_copyPropertyList(currentClass, &count)
    let intCount = Int(count)

    guard let properties = propertyList, intCount > 0 else {return}

    for i in 0 ..< intCount {
        let property : objc_property_t = properties[i]

        let nameCString = property_getName(property)
        print("\t Property name:\(String(cString: nameCString))");

    }

    free(properties)
}

func printMethodNamesForClass(_ currentClass: AnyClass) {
    var methodCount: UInt32 = 0
    let methodList = class_copyMethodList(currentClass, &methodCount)

    guard let methods = methodList, methodCount > 0 else {return}

    var ptr = methods
    for _ in 0 ..< methodCount {

        let sel = method_getName(ptr.pointee)
        ptr = ptr.successor()

        let nameCString = sel_getName(sel)

        print("\t method named:\(String(cString: nameCString))");
    }

}
于 2019-05-04T17:16:53.193 回答