| 测试已测试 | ✗ |
| 语言语言 | Obj-CObjective C |
| 许可证 | MIT |
| 发布最后发布 | 2014年12月 |
由 Jackie CHUENG 维护。
CTObjectiveCRuntimeAdditions 引入以下新的运行时扩展：
void class_swizzleSelector(Class class, SEL originalSelector, SEL newSelector);void class_swizzlesMethodsWithPrefix(Class class, NSString *prefix);void class_enumerateMethodList(Class class, CTMethodEnumertor enumerator);Class class_subclassPassingTest(Class class, CTClassTest test);IMP class_replaceMethodWithBlock(Class class, SEL originalSelector, id block);void class_implementPropertyInUserDefaults(Class class, NSString *propertyName, BOOL automaticSynchronizeUserDefaults);void class_implementProperty(Class class, NSString *propertyName, objc_AssociationPolicy associationPolicy);CTBlockDescription 允许您在运行时检查块，包括参数和编译时特性。
可以像下面的测试块一样使用 CTBlockDescription：
// a test block.
BOOL(^testBlock)(BOOL animated, id object) = ^BOOL(BOOL animated, id object) {
return YES;
};
// allocating a block description
CTBlockDescription *blockDescription = [[CTBlockDescription alloc] initWithBlock:testBlock];
// getting a method signature for this block
NSMethodSignature *methodSignature = blockDescription.blockSignature;
/**
<NSMethodSignature: 0x253f080>
number of arguments = 3
frame size = 12
is special struct return? NO
return value: -------- -------- -------- --------
type encoding (c) 'c'
flags {isSigned}
modifiers {}
frame {offset = 0, offset adjust = 0, size = 4, size adjust = -3}
memory {offset = 0, size = 1}
argument 0: -------- -------- -------- --------
type encoding (@) '@?'
flags {isObject, isBlock}
modifiers {}
frame {offset = 0, offset adjust = 0, size = 4, size adjust = 0}
memory {offset = 0, size = 4}
argument 1: -------- -------- -------- --------
type encoding (c) 'c'
flags {isSigned}
modifiers {}
frame {offset = 4, offset adjust = 0, size = 4, size adjust = -3}
memory {offset = 0, size = 1}
argument 2: -------- -------- -------- --------
type encoding (@) '@'
flags {isObject}
modifiers {}
frame {offset = 8, offset adjust = 0, size = 4, size adjust = 0}
memory {offset = 0, size = 4}
*/MIT
感谢 Block 实现规范 和 A2DynamicDelegate 项目，它们的某些优秀的 libffi 样本和编码到 libffi 类型的转换。