属性声明的属性与所有权修饰符的对应关系
assign __unsafe_unretained
copy __strong
retain __strong
strong __strong
unsafe_unretained __unsafe_unretained
weak __weak
posted on 2015-10-23 14:23 FKunLam 阅读(106) 评论(0) 编辑 收藏 举报
