为动态类方法解析将块强制转换为void *

+(BOOL)resolveClassMethod:(SEL)aSel {
    NSString *lString = NSStringFromSelector(aSel);

    if ([self validateLetterAndAccidental:lString]) {

        id (^noteFactoryBLOCK)(id) = ^(id aSelf) {
            return [self noteWithString:lString];
        };

        IMP lIMP = imp_implementationWithBlock(noteFactoryBLOCK);
        ...

    IMP myIMP = imp_implementationWithBlock(objc_unretainedPointer(noteFactoryBLOCK));

Semantic Issue: Passing \'objc_objectptr_t\' (aka \'const void *\') to parameter of type \'void *\' discards qualifiers

IMP myIMP = imp_implementationWithBlock((void*)objc_unretainedPointer(noteFactoryBLOCK));