打印 Model 的内容

一、先//导入runtime头文件

#import <objc/runtime.h>

二、引入下面内容

- (NSString *)description {

//初始化一个字典

NSMutableDictionary *dictionary = [NSMutableDictionary dictionary];

//得到当前class的所有属性

uint count;

objc_property_t *properties = class_copyPropertyList([self class], &count);

//循环并用KVC得到每个属性的值

for (int i = 0; i<count; i++) {

objc_property_t property = properties[i];

NSString *name = @(property_getName(property));

id value = [self valueForKey:name]?:@"nil";//默认值为nil字符串

[dictionary setObject:value forKey:name];//装载到字典里

}

//释放

free(properties);

//return

return [NSString stringWithFormat:@"<%@: %p> -- %@",[self class],self,dictionary];

}