/*

memberMethod:是否成員方法

*/

void swizzleMethod(Class class,SEL originalSelector,SEL swizzledSelector,BOOL memberMethod) {

? ? Method originalMethod ;

? ? Method swizzledMethod;

? ? if( memberMethod ) {

? ? ? ? originalMethod =class_getInstanceMethod(class, originalSelector);

? ? ? ? swizzledMethod =class_getInstanceMethod(class, swizzledSelector);

? ? }else{

? ? ? ? class =object_getClass(class);// <------修改

? ? ? ? originalMethod =class_getClassMethod(class, originalSelector);

? ? ? ? swizzledMethod =class_getClassMethod(class, swizzledSelector);

? ? }

? ? IMP swizzledImp =method_getImplementation(swizzledMethod);

? ? char* swizzledTypes = (char*)method_getTypeEncoding(swizzledMethod);

? ? IMP originalImp =method_getImplementation(originalMethod);

? ? char* originalTypes = (char*)method_getTypeEncoding(originalMethod);

? ? BOOL success =class_addMethod(class, originalSelector, swizzledImp, swizzledTypes);

? ? if(success) {

? ? ? ? class_replaceMethod(class, swizzledSelector, originalImp, originalTypes);

? ? }else{

? ? ? ? // 添加失敗，表明已經(jīng)有這個方法，直接交換

? ? ? ? method_exchangeImplementations(originalMethod, swizzledMethod);

? ? }

}