iOS 数组深复制 NSMutableCopy

实现模型数组深拷贝的方法
1、最笨的方法就是通过遍历逐个拷贝元素

NSMutableArray *array = [NSMutableArray array];
for (Person *person in dataSourceAry) {
    [array addObject:[person copy]];
}

2、也有人使用归档解档实现数组内部元素拷贝

3、这么好用的一个方法现在才发现（推荐）

- (instancetype)initWithArray:(NSArray *)array copyItems:(BOOL)flag 

这里是系统提供的方法，使用时，需要ObjectType实现NSCopying

NSArray *deepCopyAry = [[NSArray alloc]initWithArray:dataSourceAry copyItems:YES];
NSLog(@"", dataSourceAry);
NSLog(@"", deepCopyAry);
    
[deepCopyAry enumerateObjectsUsingBlock:^(Person *obj, NSUInteger idx, BOOL * _Nonnull stop) {
    obj.name = @"弗兰克";
    obj.dog.name = @"弗兰克的dog";
}];

NSLog(@"dataSourceAry[0].name = %@", dataSourceAry[0].name);
NSLog(@"deepCopyAry[0].name = %@", deepCopyAry[0].name);
    
NSLog(@"dataSourceAry[0].dog.name = %@", dataSourceAry[0].dog.name);
NSLog(@"deepCopyAry[0].dog.name = %@", deepCopyAry[0].dog.name);
    

工程实践：

@interface JJSOrderType : NSObject

@property (nonatomic, copy) NSString *name;
@property (nonatomic, assign) NSInteger value;
@property (nonatomic, assign) BOOL bisSelected;

@end


@implementation JJSOrderType
-(id)copyWithZone:(NSZone *)zone{
    JJSOrderType *model = [JJSOrderType allocWithZone:zone];
    model.name = [_name copy];
    model.value = _value;
    model.bisSelected = _bisSelected;
    return model;
}
-(id)mutableCopyWithZone:(NSZone *)zone{
    JJSOrderType *model = [JJSOrderType allocWithZone:zone];
    model.name = [_name mutableCopy];
    model.value = _value;
    model.bisSelected = _bisSelected;
    return model;
}

调用：

                self.sortTypeArray = [NSMutableArray arrayWithArray: [JJSOrderType mj_objectArrayWithKeyValuesArray:dict]] ;
                 
                SearchDiscoverListViewController *left_allVC = self.controllers[0];
//                left_allVC.sortTypeArray = [self.sortTypeArray mutableCopy];
                left_allVC.sortTypeArray = [NSMutableArray array];// [self.bigCategoryCourseArray mutableCopy];
                for (JJSOrderType *model in self.sortTypeArray) {
                    [left_allVC.sortTypeArray addObject:[model mutableCopy]];
                }
                
                NSArray  *deepCopyAry = [[NSArray alloc]initWithArray:self.sortTypeArray copyItems:YES];
                NSLog(@"", self.sortTypeArray);
                NSLog(@"", deepCopyAry);