ios runtime 動態向類添加方法 – iPhone手機開發技術文章 iPhone軟體開發教學課程

1、定義C函數：

void dynamicMethodIMP(id
self, SEL _cmd)

{

NSLog(@”蝸牛也瘋狂”);

}

2、重寫函數+(BOOL)resolveInstanceMethod:(SEL)sel

+(BOOL)resolveInstanceMethod:(SEL)sel

{

class_addMethod([self
class], sel, (IMP)dynamicMethodIMP,
“v@:”);

return [super
resolveInstanceMethod:sel];

}

3、使用：

SEL select =
NSSelectorFromString(@”resolveThisMethodDynamically”);

[class
resolveInstanceMethod:select];

[[class instance] performSelector:select];