Question

我想将对象添加到nsdictionary并访问这些对象或修改对象中的属性，但是我无法获取它们。

例如：

ObjectClass:

-(id)init
{
    self = [super init];
    if (self)
    {
        self.firstName = @"";
        self.lastName = @"";
    }
    return self;
}


    mainClass:

    ObjectClass *myObject = [ObjectClass allo] init];

    NSMutableDictionary *listOfClients = [NSMutableDictionary allo] init];

    [self.listOfClients setObject:myObject forKey:@"firstClient"];

    (lldb) po [listOfClients valueForKey:@"firstClient"]
    $5 = 0x0683e140 <myObject: 0x683e140>
    (lldb) po [_testDic valueForKey:@"firstClient.myObject"]
    $6 = 0x00000000 <nil>

如何访问firstClient的firstName？

我真的很感谢你的帮助

Answer 1

首先，您的listOfClients本地变量和您的财产存在命名冲突。尝试这样的事情：

self.listOfClients = [[NSMutableDictionary alloc] init];

ObjectClass *myObject = [[ObjectClass alloc] init];
myObject.firstName = @"John";
myObject.lastName = @"Smith";

self.listOfClients[@"firstClient"] = myObject;

这将完成初始化字典和对象并将对象放入字典中。然后你可以访问这样的项目：

ObjectClass *obj = (ObjectClass *)self.listOfClients[@"firstClient"];
NSLog(@"Name: %@ %@", obj.firstName, obj.lastName);

Answer 2

我完全错过了这个：

[listOfClients valueForKeyPath：@“firstClient.lastName”];

iOS将对象添加到NSDictionary并访问NSDictionary中的对象

2 个答案: