iOS开发——高级技术精选OC篇&Runtime之字典转模型实战

 1 ///通过运行时获取当前对象的所有属性的名称，以数组的形式返回
 2 - (NSArray *) allPropertyNames{
 3     ///存储所有的属性名称
 4     NSMutableArray *allNames = [[NSMutableArray alloc] init];
 5     
 6     ///存储属性的个数
 7     unsigned int propertyCount = 0;
 8     
 9     ///通过运行时获取当前类的属性
10     objc_property_t *propertys = class_copyPropertyList([self class], &propertyCount);
11     
12     //把属性放到数组中
13     for (int i = 0; i < propertyCount; i ++) {
14         ///取出第一个属性
15         objc_property_t property = propertys[i];
16         
17         const char * propertyName = property_getName(property);
18         
19         [allNames addObject:[NSString stringWithUTF8String:propertyName]];
20     }
21     
22     ///释放
23     free(propertys);
24     
25     return allNames;
26 }

1 #pragma mark -- 通过字符串来创建该字符串的Setter方法，并返回
2 - (SEL) creatGetterWithPropertyName: (NSString *) propertyName{
3     
4     //1.返回get方法: oc中的get方法就是属性的本身
5     return NSSelectorFromString(propertyName);
6 }

 1 - (void) displayCurrentModleProperty{
 2     
 3     //获取实体类的属性名
 4     NSArray *array = [self allPropertyNames];
 5  
 6     //拼接参数
 7     NSMutableString *resultString = [[NSMutableString alloc] init];
 8     
 9     for (int i = 0; i < array.count; i ++) {
10         
11         //获取get方法
12         SEL getSel = [self creatGetterWithPropertyName:array[i]];
13         
14         if ([self respondsToSelector:getSel]) {
15             
16             //获得类和方法的签名
17             NSMethodSignature *signature = [self methodSignatureForSelector:getSel];
18 
19             //从签名获得调用对象
20             NSInvocation *invocation = [NSInvocation invocationWithMethodSignature:signature];
21 
22             //设置target
23             [invocation setTarget:self];
24             
25             //设置selector
26             [invocation setSelector:getSel];
27 
28             //接收返回的值
29             NSObject *__unsafe_unretained returnValue = nil;
30 
31             //调用
32             [invocation invoke];
33 
34             //接收返回值
35             [invocation getReturnValue:&returnValue];
36 
37             [resultString appendFormat:@"%@\n", returnValue];
38         }
39     }
40     NSLog(@"%@", resultString);
41     
42 }

BeautifulGirlModel *beautifulGirl = [BeautifulGirlModel modelWithDictionary:data];
         
         [beautifulGirl displayCurrentModleProperty];

#pragma 返回属性和字典key的映射关系
 -(NSDictionary *) propertyMapDic{
     return nil;
 }

 1 - (instancetype)initWithDictionary: (NSDictionary *) data{
 2     {
 3         self = [super init];
 4         if (self) {
 5             if ([self propertyMapDic] == nil) {
 6                 [self assginToPropertyWithDictionary:data];
 7             } else {
 8                 [self assginToPropertyWithNoMapDictionary:data];
 9             }
10         }
11         return self;
12     }
13 }

 1 #pragma 根据映射关系来给Model的属性赋值
 2 -(void) assginToPropertyWithNoMapDictionary: (NSDictionary *) data{
 3     ///获取字典和Model属性的映射关系
 4     NSDictionary *propertyMapDic = [self propertyMapDic];
 5     
 6     ///转化成key和property一样的字典，然后调用assginToPropertyWithDictionary方法
 7     
 8     NSArray *dicKey = [data allKeys];
 9 
10     
11     NSMutableDictionary *tempDic = [[NSMutableDictionary alloc] initWithCapacity:dicKey.count];
12     
13     for (int i = 0; i < dicKey.count; i ++) {
14         NSString *key = dicKey[i];
15         [tempDic setObject:data[key] forKey:propertyMapDic[key]];
16     }
17     
18     [self assginToPropertyWithDictionary:tempDic];
19     
20 }

 1 //
 2 //  BadBoyModel.h
 3 //  BaseModelProject
 4 //
 5 //  Created by Mr.LuDashi on 15/7/24.
 6 //  Copyright (c) 2015年 ludashi. All rights reserved.
 7 //
 8 
 9 #import "BaseModelObject.h"
10 
11 @interface BadBoyModel : BaseModelObject
12 
13 @property (nonatomic, copy) NSString *boy1;
14 @property (nonatomic, copy) NSString *boy2;
15 @property (nonatomic, copy) NSString *boy3;
16 @property (nonatomic, copy) NSString *boy4;
17 
18 @end

 1 //
 2 //  BadBoyModel.m
 3 //  BaseModelProject
 4 //
 5 //  Created by Mr.LuDashi on 15/7/24.
 6 //  Copyright (c) 2015年 ludashi. All rights reserved.
 7 //
 8 
 9 #import "BadBoyModel.h"
10 
11 @implementation BadBoyModel
12 
13 #pragma 返回属性和字典key的映射关系
14 -(NSDictionary *) propertyMapDic{
15     return @{@"keyBoy1":@"boy1",
16              @"keyBoy2":@"boy2",
17              @"keyBoy3":@"boy3",
18              @"keyBoy4":@"boy4",};
19 }
20 
21 @end

 1 //生成Dic的Key与Model的属性不一样的字典。
 2         
 3         NSMutableDictionary *data1 = [[NSMutableDictionary alloc] init];
 4         
 5         //创建测试适用的字典
 6         for(int i = 1; i <= 4; i ++){
 7             NSString *key = [NSString stringWithFormat:@"keyBoy%d", i];
 8             
 9             NSString *value = [NSString stringWithFormat:@"我是第%d个坏男孩", i];
10             
11             [data1 setObject:value forKey:key];
12         }

BadBoyModel *badBoyModel = [BadBoyModel modelWithDictionary:data1];
      
[badBoyModel displayCurrentModleProperty];