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C基本类型转成OC的类型

2016-01-09

OC对C类型的包装NSNumber

由于NSNumber是个Object通过指针调用,而C类型是基本类型,是直接调用内存.

- (NSNumber *)initWithChar:(char)value NS_DESIGNATED_INITIALIZER;
- (NSNumber *)initWithUnsignedChar:(unsigned char)value NS_DESIGNATED_INITIALIZER;
- (NSNumber *)initWithShort:(short)value NS_DESIGNATED_INITIALIZER;
- (NSNumber *)initWithUnsignedShort:(unsigned short)value NS_DESIGNATED_INITIALIZER;
- (NSNumber *)initWithInt:(int)value NS_DESIGNATED_INITIALIZER;
- (NSNumber *)initWithUnsignedInt:(unsigned int)value NS_DESIGNATED_INITIALIZER;
- (NSNumber *)initWithLong:(long)value NS_DESIGNATED_INITIALIZER;
- (NSNumber *)initWithUnsignedLong:(unsigned long)value NS_DESIGNATED_INITIALIZER;
- (NSNumber *)initWithLongLong:(long long)value NS_DESIGNATED_INITIALIZER;
- (NSNumber *)initWithUnsignedLongLong:(unsigned long long)value NS_DESIGNATED_INITIALIZER;
- (NSNumber *)initWithFloat:(float)value NS_DESIGNATED_INITIALIZER;
- (NSNumber *)initWithDouble:(double)value NS_DESIGNATED_INITIALIZER;
- (NSNumber *)initWithBool:(BOOL)value NS_DESIGNATED_INITIALIZER;
- (NSNumber *)initWithInteger:(NSInteger)value NS_AVAILABLE(10_5, 2_0) NS_DESIGNATED_INITIALIZER;
- (NSNumber *)initWithUnsignedInteger:(NSUInteger)value NS_AVAILABLE(10_5, 2_0) NS_DESIGNATED_INITIALIZER;

快速转换

除了写NSNumber的初始化类之外,还可以通过基本类型前加”@”快速转换.

int a = 1;
NSLog(@"%d",a);
NSLog(@"%@",@2);
id str = @3;
NSLog(@"%@",str);
NSNumber *num = [[NSNumber alloc]initWithInt:@"4"];
NSLog(@"%@",num);

例如,示例代码中str本身就是个NSNumber的类,由”@3”快速转换而成.

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    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
    

我写的,大概率是错的。。。。。