反射--> 解析JSON数据

2018-02-22 20:14:28来源:cnblogs.com作者:Harely人点击

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方法一

Persons.json文件

[ { "name": "Chris", "age": 18, "city": "Shanghai", "job": "iOS" }, { "name": "Ada", "age": 16, "city": "Beijing", "job": "student" }, { "name": "Rita", "age": 17, "city": "Xiamen", "job": "HR" } ]

 Model.h类

 1 #import <Foundation/Foundation.h> 2  3 @interface PersonModel : NSObject 4  5 @property (nonatomic, copy) NSString *name; 6 @property (nonatomic, assign) NSInteger age; 7 @property (nonatomic, copy) NSString *city; 8 @property (nonatomic, copy) NSString *job; 9 @property (nonatomic, copy) NSString *sex;10 11 - (instancetype)initWithNSDictionary:(NSDictionary *)dict;12 13 @end

Model.m类

 1 #import "PersonModel.h" 2 #import <objc/runtime.h> 3  4 @implementation PersonModel 5  6 - (instancetype)initWithNSDictionary:(NSDictionary *)dict { 7     self = [super init]; 8     if (self) { 9         [self prepareModel:dict];10     }11     return self;12 }13 14 - (void)prepareModel:(NSDictionary *)dict {15     NSMutableArray *keys = [[NSMutableArray alloc] init];16     17     u_int count = 0;18     objc_property_t *properties = class_copyPropertyList([self class], &count);19     for (int i = 0; i < count; i++) {20         objc_property_t property = properties[i];21         const char *propertyCString = property_getName(property);22         NSString *propertyName = [NSString stringWithCString:propertyCString encoding:NSUTF8StringEncoding];23         [keys addObject:propertyName];24     }25     free(properties);26     27     for (NSString *key in keys) {28         if ([dict valueForKey:key]) {29             [self setValue:[dict valueForKey:key] forKey:key];30         }31     }32 }33 34 @end

调用

1 NSString *file = [[NSBundle mainBundle] pathForResource:@"Persons" ofType:@"json"];2     NSData *data = [NSData dataWithContentsOfFile:file];3     NSMutableArray *array = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers error:nil];4     5     for (NSDictionary *model in array) {6         PersonModel *person = [[PersonModel alloc] initWithNSDictionary:model];7         NSLog(@"%@, %ld, %@, %@", person.name, (long)person.age, person.city, person.job);8     }

打印结果:


方法二

数据模型的父类是:JSONModel

JSONModel的子类是:JSONPerson, JSONStudent, JSONTeacther等;

JSONStudent.h中

 1 @import JSONModel; 2  3 @interface JSONStudent : JSONModel 4  5 @property (nonatomic, copy) NSString * id; 6 @property (nonatomic, copy) NSString * name; 7 @property (nonatomic, copy) NSString * nickName; 8 @property (nonatomic, copy) NSString * phoneNumber; 9 10 @end

注意:这是用OC来写的!

 

获取属性 

 1 func getAllProperties<T: JSONModel>(anyClass: T) -> [String] { 2         var properties = [String]() 3         let count = UnsafeMutablePointer<UInt32>.allocate(capacity: 0) 4         let buff = class_copyPropertyList(object_getClass(anyClass), count) 5         let countInt = Int(count[0]) 6          7         for i in 0..<countInt { 8             let temp = buff![i] 9             let tempPro = property_getName(temp)10             let proper = String(utf8String: tempPro!)11             properties.append(proper!)12         }13         return properties14         15     }

注意:获取属性使用Swift写的,单纯用Swift和OC要简单!

使用

1 func returnListStudent(students: [JSONStudent]) {2         for item in students {3             let studentProperties = self.getAllProperties(anyClass: item)4             for i in 0..< studentProperties.count{5                 print("值是:/(item.value(forKey: studentProperties[I]))" + "属性是:/(studentProperties[i])"self.dataError)6             }7         }8     }

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