ios 反射，MVC之model

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mvc模式大家都很清楚了！最大的好處就是條理清晰一點，view和資料分開，在viewController中只要處理view和資料的邏輯就好了，甚至於邏輯都在model中處理，嗯想說什麼呢，過去兩個禮拜吧，都在做一件很挫的事情：model都是這樣子寫的：

@interface SPExangeModel : NSObject/*! *  模型屬性 */@property (nonatomic, copy) NSString * city;@property (nonatomic, copy) NSString * content;@property (nonatomic, copy) NSString * create_time;@property (nonatomic, copy) NSString * credits;@property (nonatomic, copy) NSString * eid;@property (nonatomic, copy) NSString * exchange_time;@property (nonatomic, copy) NSString * exchanged;@property (nonatomic, copy) NSString * _id;@property (nonatomic, copy) NSString * image;@property (nonatomic, copy) NSString * key;@property (nonatomic, copy) NSString * num;@property (nonatomic, copy) NSString * status;@property (nonatomic, copy) NSString * surplus;@property (nonatomic, copy) NSString * tag;@property (nonatomic, copy) NSString * title;@end

 然後不遺餘力的再實現檔案中這麼寫：

@implementation SPExangeModel- (id)initWithDictionary:(NSDictionary *)dictionary{    self = [super init];    if (self)    {        self.city      = SPFormatstring(dictionary[@"city"]);        self.content   = SPFormatstring(dictionary[@"content"]);        self.create_time = dictionary[@"create_time"];        self.credits   = SPFormatstring(dictionary[@"credits"]);        self.eid       = SPFormatstring(dictionary[@"eid"]);        self.exchange_time = dictionary[@"exchange_time"];        self.exchanged = SPFormatstring(dictionary[@"exchanged"]);        self._id       = SPFormatstring(dictionary[@"id"]);        self.image     = dictionary[@"image"];        self.key       = dictionary[@"key"];        self.num       = dictionary[@"num"];        self.status    = SPFormatstring(dictionary[@"status"]);        self.surplus   = SPFormatstring(dictionary[@"surplus"]);        self.tag       = SPFormatstring(dictionary[@"tag"]);        self.title     = dictionary[@"title"];    }    return self;}@end

當然，一個類的話無所謂了，可是當道後來，model增加到了幾十個之後，嗯，我自己崩潰了，這真的是在搬磚，翻閱了一下runtime標頭檔，比較有意思，恰好熟悉C#，因為C#中java中都有反射這種說法，所以處理起來就容易很多，嗯ios中也是有的，下面看看改進版本的

model基類：

 

#import <Foundation/Foundation.h>@interface BaseModel : NSObject/*! *  使用字典初始化 * *  @param dictionary 字典 * *  @return 結果 */- (id)initWithDictionary:(NSDictionary *)dictionary;//擷取字典形式：即屬性和值對應起來的字典- (NSDictionary *)toDictionary;@end

 

#import "BaseModel.h"#import <objc/runtime.h>@interface BaseModel(BS)/*! *  擷取屬性列表 * *  @return 屬性列表 */- (NSArray *)getPropertys;@end@implementation BaseModel- (id)initWithDictionary:(NSDictionary *)dictionary{    self = [super init];    if (self)    {        //自己屬性列表        NSArray *keys = [self getPropertys];        //字典屬性列表        NSArray *dicKeys = [dictionary allKeys];                __weak typeof(self) weakSelf = self;        [dicKeys enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, BOOL *stop) {            if ([keys containsObject:obj])            {                [weakSelf setValue:dictionary[obj] forKey:obj];            }        }];            }    return self;}- (NSArray *)getPropertys{    NSMutableArray *propertys = [[NSMutableArray alloc] init];        unsigned int outCount, i;    objc_property_t *properties = class_copyPropertyList([self class], &outCount);    for (i=0; i<outCount; i++)    {        objc_property_t property = properties[i];        NSString * key = [[NSString alloc]initWithCString:property_getName(property)  encoding:NSUTF8StringEncoding];        [propertys addObject:key];    }        return propertys;}- (NSDictionary *)toDictionary{    NSMutableDictionary *dictionary = [[NSMutableDictionary alloc] init];        //自己屬性列表    NSArray *keys = [self getPropertys];    [keys enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, BOOL *stop) {        id value = [self valueForKey:obj];        if (value != nil)        {            [dictionary setObject:value forKey:obj];        }    }];        return dictionary;}@end

 以後的mode就直接整合這個baseModel,然後調用初始化即可！！！！

 

ios 反射，MVC之model