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 <Foundation/Foundation.h> @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 <objc/runtime.h> @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:] uppercaseString];
NSString *setterSelStr = \
[NSString stringWithFormat:@"set%@%@:", capital, [attributeName substringFromIndex:]];
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 = ;
objc_property_t *properties = class_copyPropertyList(class, &propertyCount); for (unsigned int i = ; 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" : @,
@"addressInfo" : @{@"HuBei": @"WeiHan"},
@"events" : @[@"One", @"Two", @"Three"],
@"id" : @""}; // 打印出属性值
NSLog(@"%@", model.dataDictionary); return YES;
} @end
以下就是使用流程了：