用字典给Model赋值并支持map键值替换

这个是昨天教程的升级版本，支持键值的map替换。

源码如下：

NSObject+Properties.h 与 NSObject+Properties.m

////  NSObject+Properties.h////  Created by YouXianMing on 14-9-4.//  Copyright (c) 2014年 YouXianMing. All rights reserved.//#import 
    
     @interface NSObject (Properties)@property (nonatomic, strong) NSDictionary *mapDictionary;- (void)setDataDictionary:(NSDictionary*)dataDictionary;- (NSDictionary *)dataDictionary;@end
    

////  NSObject+Properties.m////  Created by YouXianMing on 14-9-4.//  Copyright (c) 2014年 YouXianMing. All rights reserved.//#import "NSObject+Properties.h"#import 
    
     @implementation NSObject (Properties)#pragma runtime - 动态添加了一个属性，map属性static char mapDictionaryFlag;- (void)setMapDictionary:(NSDictionary *)mapDictionary{    objc_setAssociatedObject(self, &mapDictionaryFlag, mapDictionary, OBJC_ASSOCIATION_RETAIN_NONATOMIC);}- (NSDictionary *)mapDictionary{    return objc_getAssociatedObject(self, &mapDictionaryFlag);}#pragma public - 公开方法- (void)setDataDictionary:(NSDictionary*)dataDictionary{    [self setAttributes:[self mapDictionary:self.mapDictionary dataDictionary:dataDictionary]                    obj:self];}- (NSDictionary *)dataDictionary{    // 获取属性列表    NSArray *properties = [self propertyNames:[self class]];        // 根据属性列表获取属性值    return [self propertiesAndValuesDictionary:self properties:properties];}#pragma private - 私有方法// 通过属性名字拼凑setter方法- (SEL)getSetterSelWithAttibuteName:(NSString*)attributeName{    NSString *capital = [[attributeName substringToIndex:1] uppercaseString];    NSString *setterSelStr = \    [NSString stringWithFormat:@"set%@%@:", capital, [attributeName substringFromIndex:1]];    return NSSelectorFromString(setterSelStr);}// 通过字典设置属性值- (void)setAttributes:(NSDictionary*)dataDic obj:(id)obj{    // 获取所有的key值    NSEnumerator *keyEnum = [dataDic keyEnumerator];        // 字典的key值(与Model的属性值一一对应)    id attributeName = nil;    while ((attributeName = [keyEnum nextObject]))    {        // 获取拼凑的setter方法        SEL sel = [obj getSetterSelWithAttibuteName:attributeName];                // 验证setter方法是否能回应        if ([obj respondsToSelector:sel])        {            id value      = nil;            id tmpValue   = dataDic[attributeName];                        if([tmpValue isKindOfClass:[NSNull class]])            {                // 如果是NSNull类型，则value值为空                value = nil;            }            else            {                value = tmpValue;            }                        // 执行setter方法            [obj performSelectorOnMainThread:sel                                  withObject:value                               waitUntilDone:[NSThread isMainThread]];        }    }}// 获取一个类的属性名字列表- (NSArray*)propertyNames:(Class)class{    NSMutableArray  *propertyNames = [[NSMutableArray alloc] init];    unsigned int     propertyCount = 0;    objc_property_t *properties    = class_copyPropertyList(class, &propertyCount);        for (unsigned int i = 0; i < propertyCount; ++i)    {        objc_property_t  property = properties[i];        const char      *name     = property_getName(property);                [propertyNames addObject:[NSString stringWithUTF8String:name]];    }        free(properties);        return propertyNames;}// 根据属性数组获取该属性的值- (NSDictionary*)propertiesAndValuesDictionary:(id)obj properties:(NSArray *)properties{    NSMutableDictionary *propertiesValuesDic = [NSMutableDictionary dictionary];        for (NSString *property in properties)    {        SEL getSel = NSSelectorFromString(property);                if ([obj respondsToSelector:getSel])        {            NSMethodSignature  *signature  = nil;            signature                      = [obj methodSignatureForSelector:getSel];            NSInvocation       *invocation = [NSInvocation invocationWithMethodSignature:signature];            [invocation setTarget:obj];            [invocation setSelector:getSel];            NSObject * __unsafe_unretained valueObj = nil;            [invocation invoke];            [invocation getReturnValue:&valueObj];                        //assign to @"" string            if (valueObj == nil)            {                valueObj = @"";            }                        propertiesValuesDic[property] = valueObj;        }    }        return propertiesValuesDic;}// 根据map值替换掉键值- (NSDictionary *)mapDictionary:(NSDictionary *)map dataDictionary:(NSDictionary *)data{    if (map && data)    {        // 拷贝字典        NSMutableDictionary *newDataDic = [NSMutableDictionary dictionaryWithDictionary:data];                // 获取所有map键值        NSArray *allKeys                = [map allKeys];                for (NSString *oldKey in allKeys)        {            // 获取到value            id value = [newDataDic objectForKey:oldKey];                        // 如果有这个value            if (value)            {                NSString *newKey = [map objectForKey:oldKey];                [newDataDic removeObjectForKey:oldKey];                [newDataDic setObject:value forKey:newKey];            }        }                return newDataDic;    }    else    {        return data;    }}@end
    

注意：

这里给NSObject的category新添加了一个属性，叫mapDictionary

然后给member添加一个属性叫做memberID

以下是使用的情况：

////  AppDelegate.m//  Runtime////  Created by YouXianMing on 14-9-5.//  Copyright (c) 2014年 YouXianMing. All rights reserved.//#import "AppDelegate.h"#import "NSObject+Properties.h"#import "Model.h"@implementation AppDelegate- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions{    // 初始化model    Model *model = [Model new];        // 设置map值    model.mapDictionary = @{@"id": @"memberID"};        // 通过字典赋值    model.dataDictionary = @{@"name"        : @"YouXianMing",                             @"age"         : @26,                             @"addressInfo" : @{@"HuBei": @"WeiHan"},                             @"events"      : @[@"One", @"Two", @"Three"],                             @"id"          : @"7788"};        // 打印出属性值    NSLog(@"%@", model.dataDictionary);        return YES;}@end

以下就是使用流程了：