二. 使用Runtime封装模型

+ (NSArray *)modelsWithArr:(NSArray *)arr {

NSMutableArray *models = @[].mutableCopy;

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

NSDictionary *dic = arr[i];

[models addObject:[self modelWithDic:dic]];

}

return models;

}

+ (id)modelWithDic:(NSDictionary *)dic {

NSObject *model = self.new;

NSArray *propertyNames = [self allPropertyNames];

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

SEL setSel = [self setterWithPropertyName:propertyNames[i]];

//属性值

NSString *str = [NSString stringWithFormat:@"%@", dic[propertyNames[i]]];

if (str.length&&[model respondsToSelector:setSel]) {

IMP setterImp = [model methodForSelector:setSel];

void (*func)(id, SEL, NSString *) = (void *)setterImp;

func(model,setSel,str);

// id result = [model performSelector:setSel withObject:str];

}

}

return model;

}

// 根据属性名生成setter方法

+ (SEL)setterWithPropertyName:(NSString *)propertyName {

// 首字母大写

// 不能直接使用 capitalizedString 方法

NSString *header = [propertyName substringWithRange:NSMakeRange(0, 1)];

NSString *str = [NSString stringWithFormat:@"%@%@", [header capitalizedString], [propertyName substringWithRange:NSMakeRange(1, propertyName.length-1)]];

NSString *setterName = [NSString stringWithFormat:@"set%@:", str];return NSSelectorFromString(setterName);

}

// 获取所有属性名

+ (NSArray *)allPropertyNames {

NSMutableArray *allNames = @[].mutableCopy;

unsigned int propertyCount = 0;

objc_property_t *propertyList = class_copyPropertyList(self, &propertyCount);

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

objc_property_t property = propertyList[i];

const char *propertyName = property_getName(property);

[allNames addObject:[NSString stringWithUTF8String:propertyName]];

}

free(propertyList);

return allNames;

}

原代码: Demo