[iOS]YYModel用法总结

笔者之前一直在用MJExtension来做网络数据模型转换，最近发现这个库在某些场景下转换会出现问题，然后就尝试了使用YYModel。YYModel很久之前就听说过，源代码写得很精妙，也有很多开发者在用。这里简单通过demo总结下它的用法。

新建两个model：YYAuthor和YYBook。

YYAuthor.h

//
//  YYAuthor.h
//  YYModelDemo
//
//  Created by mac on 2019/05/01.
//  Copyright © 2019 mac All rights reserved.
//#import <Foundation/Foundation.h>NS_ASSUME_NONNULL_BEGIN@interface YYAuthor : NSObject<NSCopying,NSCoding,NSMutableCopying>@property (nonatomic,copy) NSString *name;
@property (nonatomic,strong) NSDate *birthDay;@endNS_ASSUME_NONNULL_END

YYAuthor.m

//
//  YYAuthor.m
//  YYModelDemo
//
//  Created by mac on 2019/05/01
//  Copyright © 2019 mac All rights reserved.
//#import "YYAuthor.h"
#import <NSObject+YYModel.h>@implementation YYAuthor/**If the key in JSON/Dictionary does not match to the model's property name,implements this method and returns the additional mapper.*/+ (NSDictionary *)modelCustomPropertyMapper
{return @{@"birthDay":@"birthday"};
}- (void)encodeWithCoder:(NSCoder *)coder
{[self yy_modelEncodeWithCoder:coder];
}- (instancetype)initWithCoder:(NSCoder *)aDecoder
{self = [super init];return [self yy_modelInitWithCoder:aDecoder];
}- (id)copyWithZone:(NSZone *)zone
{return [self yy_modelCopy];
}- (id)mutableCopyWithZone:(nullable NSZone *)zone
{YYAuthor *copy;if ((copy = [[[self class] alloc] init])) {[copy setValue:self.name forKey:@"name"];[copy setValue:self.birthDay forKey:@"birthDay"];}return copy;
}- (NSUInteger)hash
{return [self yy_modelHash];
}- (BOOL)isEqual:(id)object{return [self yy_modelIsEqual:object];
}@end

YYBook.h

//
//  YYBook.h
//  YYModelDemo
//
//  Created by mac on 2019/05/01.
//  Copyright © 2019 mac All rights reserved.
//#import <Foundation/Foundation.h>
#import "YYAuthor.h"NS_ASSUME_NONNULL_BEGIN@interface YYBook : NSObject<NSCoding,NSCopying,NSMutableCopying>
@property (nonatomic, copy) NSString *name;
@property (nonatomic, assign) NSUInteger page;
@property (nonatomic, strong) YYAuthor *author;
@property (nonatomic, strong) NSArray <YYAuthor *> *authors;
@property (nonatomic, copy) NSString *publish;@endNS_ASSUME_NONNULL_END

YYBook.m

//
//  YYBook.m
//  YYModelDemo
//
//  Created by mac on 2019/05/01.
//  Copyright © 2019 mac All rights reserved.
//#import "YYBook.h"
#import <NSObject+YYModel.h>
@implementation YYBook/**
If the key in JSON/Dictionary does not match to the model's property name,
implements this method and returns the additional mapper.*/+ (NSDictionary *)modelCustomPropertyMapper
{return @{@"page":@"pages"};
}/**If the property is a container object, such as NSArray/NSSet/NSDictionary,implements this method and returns a property->class mapper, tells which kind ofobject will be add to the array/set/dictionary.*/+ (NSDictionary *)modelContainerPropertyGenericClass {return @{@"authors" : [YYAuthor class]};
}// NSCoding
- (void)encodeWithCoder:(NSCoder *)coder
{[self yy_modelEncodeWithCoder:coder];
}- (instancetype)initWithCoder:(NSCoder *)aDecoder
{self = [super init];return [self yy_modelInitWithCoder:aDecoder];
}//NSCopying
- (id)copyWithZone:(NSZone *)zone
{return [self yy_modelCopy];
}- (id)mutableCopyWithZone:(nullable NSZone *)zone
{YYBook *copy;if ((copy = [[[self class] alloc] init])) {[copy setValue:self.name forKey:@"name"];[copy setValue:@(self.page) forKey:@"pages"];[copy setValue:self.author forKey:@"author"];[copy setValue:self.authors forKey:@"authors"];}return copy;
}// hash
- (NSUInteger)hash
{return [self yy_modelHash];
}// isEqual
- (BOOL)isEqual:(id)object{return [self yy_modelIsEqual:object];
}/**All the properties in blacklist will be ignored in model transform process.Returns nil to ignore this feature.@return An array of property's name.*/
+ (nullable NSArray<NSString *> *)modelPropertyBlacklist
{return @[@"publish"];
}/**If a property is not in the whitelist, it will be ignored in model transform process.Returns nil to ignore this feature.@return An array of property's name.*/
+ (nullable NSArray<NSString *> *)modelPropertyWhitelist
{return @[@"name",@"author",@"authors"];
}
@end

使用方法：

ViewController.m

//
//  ViewController.m
//  YYModelDemo
//
//  Created by mac on 2019/05/01.
//  Copyright © 2019 mac All rights reserved.
//#import "ViewController.h"
#import <YYModel/YYModel.h>
#import "YYAuthor.h"
#import "YYBook.h"@interface ViewController ()@end@implementation ViewController- (void)viewDidLoad {[super viewDidLoad];///>Json->modelNSString *jsonStr = @"{\"name\":\"Harry Potter\",\"pages\":256,\"author\":{\"name\":\"J.K.Rowling\",\"birthDay\":\"1975-07-31\"}}";YYBook *B = [YYBook yy_modelWithJSON:jsonStr];YYBook *b =  [B mutableCopy];if ([b isEqual:B]) {// 对象内容是相等的NSLog(@"b is equal toB");} else {NSLog(@"b is not requal toB");}YYAuthor *ba = B.author;YYAuthor *baa = [ba mutableCopy];if ([ba isEqual:baa]) {// 对象内容是相等的NSLog(@"ba is equal baa");} else {NSLog(@"ba is not requal baa");}///>>NSDictionary->modelNSDictionary *dic = @{@"name":@"Harry Potter",@"pages":@(256),@"author":@{@"name":@"J.K.Rowling",@"birthday":@"1975-07-31"},@"publish":@"BeijingUniversity"};YYBook *book = [YYBook yy_modelWithDictionary:dic];///>>>container propertyNSDictionary *dic1 = @{@"name":@"Harry Potter",@"pages":@(256),@"author":@{@"name":@"J.K.Rowling",@"birthday":@"1975-07-31"},@"authors":@[@{@"name":@"J.K.Rowling",@"birthday":@"1976-07-31"},@{@"name":@"J.K.Rowling2",@"birthday":@"1977-07-31"},@{@"name":@"J.K.Rowling3",@"birthday":@"1978-07-31"}],@"publish":@"BeijingUniversity"};YYBook *book1 = [YYBook yy_modelWithDictionary:dic1];[book1.authors enumerateObjectsUsingBlock:^(YYAuthor * _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {NSLog(@"author name is--->%@",obj.name);}];///>>>model->jsonNSString *jsonStr1 = [book1 yy_modelToJSONString];NSLog(@"jsonStr1--->%@",jsonStr1);///>>>model->NSDictionaryNSDictionary *dic2 = [book1 yy_modelToJSONObject];NSLog(@"dic2--->%@",dic2);NSData *data = [book1 yy_modelToJSONData];NSLog(@"data str --->%@",[[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding]);
}@end

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