ios 获取属性的类型

如何在运行的时候动态获取到该属性的类型呢？

此方法获取属性的特性：property_copyAttributeValue

unsigned int a;
        
objc_property_t * result = class_copyPropertyList(object_getClass(k), &a);

for (unsigned int i = 0; i < a; i++) {
    objc_property_t o_t =  result[i];
    NSLog(@"name: %@", [NSString stringWithFormat:@"%s", property_getName(o_t)]);
    NSLog(@"att: %@", [NSString stringWithFormat:@"%s", property_getAttributes(o_t)]);
    
}

2018-06-07 15:32:59.252063+0800 runtime[17026:450201] name: height_i
2018-06-07 15:32:59.252217+0800 runtime[17026:450201] att: Ti,V_height_i
2018-06-07 15:32:59.252316+0800 runtime[17026:450201] name: height_d
2018-06-07 15:32:59.252365+0800 runtime[17026:450201] att: Td,V_height_d
2018-06-07 15:32:59.252404+0800 runtime[17026:450201] name: height_f
2018-06-07 15:32:59.252434+0800 runtime[17026:450201] att: Tf,V_height_f
2018-06-07 15:32:59.252452+0800 runtime[17026:450201] name: weight
2018-06-07 15:32:59.252498+0800 runtime[17026:450201] att: T@"NSNumber",R,N,V_weight
2018-06-07 15:32:59.252518+0800 runtime[17026:450201] name: name
2018-06-07 15:32:59.252546+0800 runtime[17026:450201] att: T@"NSString",&,V_name
2018-06-07 15:32:59.252573+0800 runtime[17026:450201] name: family
2018-06-07 15:32:59.252612+0800 runtime[17026:450201] att: T@"NSString",&,V_family

如上可以打印特性值:

1. 特性以 , 隔开
2. 特性第一个是类型
3. 特性最后一个是 V_name
4. 特性中间为属性的修饰

特性的类型的规定：

image.png

特性的属性的修饰规定为：

image.png

官方文档为：* Declared Properties