一、简单字典 to 模型
先创建个字典(字典均来自MJExtensionExample)
在 ViewController.m
#pragma mark - 简单字典 转 模型
- (void)simpleKeyValuesToObject {
NSDictionary *dict = @{
@"name" : @"Jack",
@"icon" : @"lufy.png",
@"age" : @"20",
@"height" : @1.55,
@"money" : @"100.9",
};
}
创建一个NSObject 的分类NSObject+Extension
提供一个类方法 objectFromKeyValue:
实现:
+ (instancetype)objectFromKeyValue:(NSDictionary*)keyValue {
id obj = [[self alloc]init];
unsigned int count;
// 获取成员变量数组
Ivar *ivarList = class_copyIvarList(self, &count);
// 遍历
for (int i = 0; i < count; i++) {
Ivar ivar = ivarList[i];
//获取成员变量名字
NSString *ivarName = [NSString stringWithUTF8String:ivar_getName(ivar)];
NSLog(@"ivarName = %@",ivarName);//_age _name _icon _height _money
// 截取 - 获得模型的属性
NSString *key = [ivarName substringFromIndex:1];
NSLog(@"key = %@",key);//age name icon height money
// 获取字典里的值
id value = keyValue[key];
// 赋值
[obj setValue:value forKey:key];
}
return obj;
}
YLUserModel 属性
回到ViewController.m
YLUserModel *user = [YLUserModel objectFromKeyValue:dict];
NSLog(@"name = %@,icon = %@,age = %@,height = %@,money = %@,",user.name,user.icon,user.age,user.height,user.money);
简单字典转模型的输出
注意:class_copyIvarList 只能获取当前类是成员变量,不会获取父类
二、复杂字典 to 模型(模型里面包含了模型)
#pragma mark - 复杂字典 转 模型
- (void)complexKeyValuesToObject {
// 1.定义一个字典
NSDictionary *dict = @{
@"text" : @"是啊，今天天气确实不错！",
@"user" : @{
@"name" : @"Jack",
@"age" : @"20"
},
};
}
objectFromKeyValue:方法添加代码
+ (instancetype)objectFromKeyValue:(NSDictionary*)keyValue {
id obj = [[self alloc]init];
unsigned int count;
// 获取成员变量数组:注意:只会获取当前类的属性,不会获取父类
Ivar *ivarList = class_copyIvarList(self, &count);
// 遍历
for (int i = 0; i < count; i++) {
Ivar ivar = ivarList[i];
// 获取成员变量名字
NSString *ivarName = [NSString stringWithUTF8String:ivar_getName(ivar)];
//NSLog(@"ivarName = %@",ivarName);//_age _name _icon _height _money
// 截取 - 获得模型的属性名
NSString *key = [ivarName substringFromIndex:1];
//NSLog(@"key = %@",key);//age name icon height money
// 获取字典里的值
id value = keyValue[key];
// 复杂字典,里面还有字典
// 所以要获取成员变量的类型
NSString *ivarType = [NSString stringWithUTF8String:ivar_getTypeEncoding(ivar)];
// @\"YLUserModel\" 需要截取 ,否则下面的 secIvarClass 是不存在的(这里要好好看下MJExtension,这个解决方式比较low)
ivarType = [ivarType stringByReplacingOccurrencesOfString:@"@" withString:@""];
ivarType = [ivarType stringByReplacingOccurrencesOfString:@"\"" withString:@""];
NSLog(@"ivarType = %@",ivarType);
if ([value isKindOfClass:[NSDictionary class]] && ![ivarType hasPrefix:@"NS"]) {
Class secIvarClass = NSClassFromString(ivarType);
value = [secIvarClass objectFromKeyValue:value];
}
// 赋值
[obj setValue:value forKey:key];
}
return obj;
}
YLStatusModel属性.png
回到ViewController.m
YLStatusModel *status = [YLStatusModel objectFromKeyValue:dict];
NSLog(@"text = %@,name = %@",status.text,status.user.name);
复杂字典转模型的输出.png
好了,下班,数组字典转模型 和 替换数组里的key,以后再研究
