React-Native - FlexBox布局

弹性盒模型（The Flexible Box Module）,又叫Flexbox，意为“弹性布局”，旨在通过弹性的方式来对齐和分布容器中内容的空间，使其能适应不同屏幕，为盒装模型提供最大的灵活性，Flexbox可以在不同屏幕尺寸上提供一致的布局结构。

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谈谈isa

先来做几道题目，做的出来的就不要往下看了。

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@interface Animal : NSObject

@end
@implementation Animal

@end

@interface Dog  : Animal

@end

@implementation Dog

@end

@interface Demo40ViewController ()

@end

@implementation Demo40ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    
    Animal *p     = [[Animal alloc] init];
    
    BOOL isEqual  = [p isKindOfClass:[Animal class]]; 
    BOOL isEqual1 = [Animal isKindOfClass:[Animal class]]; 
    BOOL isEqual2 = [NSObject isKindOfClass:[NSObject class]]; 
    
    BOOL isEqual3 = [p isMemberOfClass:[Animal class]]; 
    BOOL isEqual4 = [Animal isMemberOfClass:[Animal class]]; 
    BOOL isEqual5 = [NSObject isMemberOfClass:[NSObject class]]; 
    
    
    BOOL isEqual6 = [(id)[NSObject class] isKindOfClass:[NSObject class]]; 
    BOOL isEqual7 = [(id)[NSObject class] isMemberOfClass:[NSObject class]];
    BOOL isEqual8 = [(id)[Dog class] isKindOfClass:[Dog class]]; 
    BOOL isEqual9 = [(id)[Dog class] isMemberOfClass:[Dog class]];
    
NSLog(@"%d__%d_%d_%d__%d_%d_%d__%d_%d_",isEqual,isEqual1,isEqual2,isEqual3,isEqual4,isEqual5,isEqual6,isEqual7,isEqual8,isEqual9);
}

@end

下面公布答案，答对的就撤了吧不要在这里浪费时间了，没答出来的那就跟着我一起一探究竟吧😁😀😃

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tag:

    缺失模块。
    1、请确保node版本大于6.2
    2、在博客根目录（注意不是yilia根目录）执行以下命令：
    npm i hexo-generator-json-content --save

    3、在根目录_config.yml里添加配置： 

      jsonContent:
    meta: false
    pages: false
    posts:
      title: true
      date: true
      path: true
      text: false
      raw: false
      content: false
      slug: false
      updated: false
      comments: false
      link: false
      permalink: false
      excerpt: false
      categories: false
      tags: true

FangLaoDa ，<br>Coder</br> <br> 目前就职于点融网 </br>