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
