Reflection -- & gt; parse JSON data, reflection -- parse json

Reflection --> parse JSON data, reflection -- parse json

 

Method 1 Persons. json File

[ { "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 class

 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 class

 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

 

 

Call

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     }

 

 

Print result:

 

 

 

 

Method 2

The data model's parent class is JSONModel.

The subclasses of JSONModel are: JSONPerson, JSONStudent, and JSONTeacther;

JSONStudent. h

 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

 

 

Note: This is written in OC!

Get attributes

 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     }

 

Note: It is easy to use Swift and OC to obtain attributes written in Swift!

Use

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 ("value: \ (item. value (forKey: studentProperties [I]) "+" Property: \ (studentProperties [I]) "self. dataError) 6} 7} 8}