MVC 架构中，经常要创建各种model，而最常用的就是用系统方法setValuesForKeysWithDictionary: ,同时在model 中用setValue：forUndefinedKey：防止crash.
下面示意是一个大model的创建
ItemModel.h
#import <Foundation/Foundation.h>
#import "AtlasModel.h"
#import "CoverKeyModel.h"
#import "LabelModel.h"
#import "LikePeopleModel.h"
#import "UserModel.h"
@interface ItemModel : NSObject
//遇字典建model
@property (nonatomic,retain) AtlasModel *atlasModel;
@property (nonatomic,retain) UserModel *userModel;
//遇数组建数组
@property (nonatomic,retain) NSMutableArray *coverKeyArray;
@property (nonatomic,retain) NSMutableArray *labelsArray;
@property (nonatomic,retain) NSMutableArray *likePeopleArray;
//bool类型
@property (nonatomic,assign) BOOL isCollect;
@property (nonatomic,assign) BOOL isLike;
@end
ItemModel.M
@implementation ItemModel
//字典转model时一定要有这个方法，防止程序崩溃
- (void)setValue:(id)value forUndefinedKey:(NSString *)key{
//字典中包含字典
if ([key isEqualToString:@"atlas"]) {
[self.atlasModel setValuesForKeysWithDictionary:value];
}
if ([key isEqualToString:@"user"]) {
[self.userModel setValuesForKeysWithDictionary:value];
}
//字典中包含数组
if ([key isEqualToString:@"labels"]) {
for (NSDictionary *dic in value) {
LabelModel *model = [[LabelModel alloc]init];
[model setValuesForKeysWithDictionary:dic];
[self.labelsArray addObject:model];
}
}
if ([key isEqualToString:@"coverKey"]) {
for (NSDictionary *dic in value) {
CoverKeyModel *model = [[ CoverKeyModel alloc]init];
[model setValuesForKeysWithDictionary:dic];
[self.coverKeyArray addObject:model];
}
}
if ([key isEqualToString:@"likePeople"]) {
for (NSDictionary *dic in value) {
LikePeopleModel *model = [[LikePeopleModel alloc]init];
[model setValuesForKeysWithDictionary:dic];
[self.likePeopleArray addObject:model];
}
}
}
//创建子model
- (UserModel*)userModel{
if (!_userModel) {
_userModel = [[UserModel alloc]init];
}
return _userModel;
}
- (AtlasModel*)atlasModel{
if (!_atlasModel) {
_atlasModel = [[AtlasModel alloc]init];
}
return _atlasModel;
}
//数组懒加载
- (NSMutableArray*)labelsArray{
if (!_labelsArray) {
_labelsArray = [NSMutableArray array];
}
return _labelsArray;
}
- (NSMutableArray *)coverKeyArray{
if (!_coverKeyArray) {
_coverKeyArray = [NSMutableArray array];
}
return _coverKeyArray ;
}
- (NSMutableArray*)likePeopleArray{
if (!_likePeopleArray) {
_likePeopleArray = [NSMutableArray array];
}
return _likePeopleArray;
}
@end
