MJExtension与YYModel对比

1, 老版本mjextension 类型转化有问题。如果json传过来的类型与模型定义类型不匹配，会导致从模型读出来的对象实际类型不匹配，进而在使用model对象的属性值时，引发方法找不到崩溃

比如：模型是字典类型，用mj_objectArrayWithKeyValuesArray把一个json数组转化为model数组，这个字典类型在json里面是字符串，模型中的就变成了字符串，而不是需要的nil类型

2，新版本类型转化 3.4.1以上版本进行测试

如果model定义为基础数值数据类型，比如bool，int，float，cgfloat等，json里面的对应key的value值是非字符串、非数值，非null等其他对象类型，数组或者字典，则会引发赋值崩溃。

Xnip2022-04-04_14-36-49.jpg

kvc赋值

-(void)testkvc{
    TypeTransferModel*a=[TypeTransferModel new];
    [a setValue:@"1" forKey:@"boola"];
    [a setValue:@1 forKey:@"boola"];
    [a setValue:@1.23 forKey:@"boola"];
    [a setValue:@true forKey:@"boola"];
    [a setValue:@"asdfads" forKey:@"boola"];
    
    //Skips initial space characters (whitespaceSet), or optional -/+ sign followed by zeroes. Returns YES on encountering one of "Y", "y", "T", "t", or a digit 1-9. It ignores any trailing characters.
    //去掉加减号和空白，然后首字母是1-9，tTYy都是true，否则是false
    [@"1" boolValue];
    //[a setValue:@{@"1":@"2"} forKey:@"boola"];//crash
    //[a setValue:@[@"123"] forKey:@"boola"];//crash
    //[a setValue:[NSNull null] forKey:@"boola"];//crash
}

3, 使用yymodel
则不会有问题

测试json串

 [
    {
        "boola":true,
        "str":"123",
        "number":123,
        "inta":123,
        "floata":123.16,
        "cgfloata":123.17,
        "dicta":{
            "key":"value"
        },
        "arraya":[
            "a",
            "12"
        ]
    },
    {
        "boola":"123",
        "str":"123",
        "number":123,
        "inta":123,
        "floata":123.16,
        "cgfloata":123.17,
        "dicta":true,
        "arraya":true
    },
    {
        "boola":1,
        "str":"123",
        "number":123,
        "inta":123,
        "floata":123.16,
        "cgfloata":123.17,
        "dicta":"12",
        "arraya":"12"
    },
    {
        "boola":null,
        "str":"123",
        "number":123,
        "inta":123,
        "floata":123.16,
        "cgfloata":123.17,
        "dicta":[
            "a",
            "12"
        ],
        "arraya":{
            "key":"value"
        }
    },
    {
        "boola":null,
        "str":123,
        "number":"123",
        "inta":"123",
        "floata":"123.1",
        "cgfloata":"123.17",
        "dicta":1,
        "arraya":1
    },
    {
        "boola":null,
        "str":null,
        "number":null,
        "inta":null,
        "floata":null,
        "cgfloata":null,
        "dicta":null,
        "arraya":null
    },
    {
        "boola":[
            "123"
        ],
        "str":[
            "123"
        ],
        "number":[
            "123"
        ],
        "inta":[
            "123"
        ],
        "floata":[
            "123"
        ],
        "cgfloata":[
            "123"
        ],
        "dicta":[
            "123"
        ],
        "arraya":[
            "123"
        ]
    }
]

测试代码

@interface TypeTransferModel : NSObject
@property (nonatomic, assign) BOOL boola;
@property (nonatomic, strong) NSString *str;
@property (nonatomic, strong) NSNumber *number;
@property (nonatomic, assign) NSInteger inta;
@property (nonatomic, assign) float floata; //如果json传的是字符串，精读可能会有问题："123.1"-》 123.099998
@property (nonatomic, assign) CGFloat cgfloata;
@property (nonatomic, strong) NSDictionary *dicta;
@property (nonatomic, strong) NSArray *arraya;
@end

-(void)test4{
    NSString*jsonstr = [NSString stringWithContentsOfFile:[[NSBundle mainBundle]pathForResource:@"json.txt" ofType:nil] encoding:NSUTF8StringEncoding error:nil];
    
    NSArray *r = [TypeTransferModel mj_objectArrayWithKeyValuesArray:jsonstr];
    NSLog(@"%@",r);
    
    
    [r enumerateObjectsUsingBlock:^(NSObject*  _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {
        NSLog(@"%@",obj.mj_keyValues);
    }];
}

-(void)test5{
    NSString*jsonstr = [NSString stringWithContentsOfFile:[[NSBundle mainBundle]pathForResource:@"jsonyy.txt" ofType:nil] encoding:NSUTF8StringEncoding error:nil];
    NSArray *r= [NSArray modelArrayWithClass:[TypeTransferModel class] json:jsonstr];
    NSLog(@"%@",r);
    NSLog(@"%@", [r modelToJSONString]);
    
}