ios 如何使用键将对象添加到 NSMutableDictionary？
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How do i add object to NSMutableDictionary with key?
提问by Ajay Chaudhary
I have plist ,i want add the elememts from that plist to a mutable dictionary .First i check the user name in plist and my current name are same or not if its same then i wanna add all value to that dictionary rom plist and also assign the same key?
我有 plist ，我想将该 plist 中的元素添加到可变字典中。首先我检查 plist 中的用户名，我当前的名称是否相同，如果相同，然后我想将所有值添加到该字典 rom plist 并分配同样的钥匙？
for(int i=0;i<[displayList count];i++)
{
if([[[data valueForKey:@"username"] objectAtIndex:i] isEqualToString:user])
{
[finalBooks setValue:[[data valueForKey:@"ID"] objectAtIndex:i] forKey:@"ID"];
[finalBooks setValue:[[data valueForKey:@"name"] objectAtIndex:i] forKey:@"name"];
[finalBooks setValue:[[data valueForKey:@"Place"] objectAtIndex:i] forKey:@"Place"];
[finalBooks setValue:[[data valueForKey:@"username"] objectAtIndex:i] forKey:@"username"];
}
}
[displayList count] this value is 7 so each value replacing 6 times ,and am getting only final valuesi want every values matching to user name i that mutabledictionary
[displayList count] 这个值是 7，所以每个值替换 6 次，并且我只得到最终值我希望每个值都匹配到用户名我那个可变字典
回答by Ajay Chaudhary
I think you should create array of dictionary. Just add your finalBooks dictionary to NSMutableArray like this
我认为你应该创建字典数组。只需像这样将您的 finalBooks 字典添加到 NSMutableArray
NSMutableArray *finalArray = [[NSMutableArray alloc]init];
(int i=0;i<[displayList count];i++)
{
if([[[data valueForKey:@"username"] objectAtIndex:i] isEqualToString:user])
{
[finalBooks setValue:[[data valueForKey:@"ID"] objectAtIndex:i] forKey:@"ID"];
[finalBooks setValue:[[data valueForKey:@"name"] objectAtIndex:i] forKey:@"name"];
[finalBooks setValue:[[data valueForKey:@"Place"] objectAtIndex:i] forKey:@"Place"];
[finalBooks setValue:[[data valueForKey:@"username"] objectAtIndex:i] forKey:@"username"];
[finalArray addObject:finalBooks];
}
}
And you will get array of dictionary. Good Luck !!
你会得到字典数组。祝你好运 ！！
回答by Gihan
setValue method in a NSMutableDictionary replaces the value if the key is same. So what you can do is either use NSMutableDictionary of arrays or dictionaries.
如果键相同，NSMutableDictionary 中的 setValue 方法将替换该值。所以你可以做的是使用数组或字典的 NSMutableDictionary。
NSMutableDictionary *userDictionary=[[NSMutableDictionary alloc]init];
(int i=0;i<[displayList count];i++)
{
if([[[data valueForKey:@"username"] objectAtIndex:i] isEqualToString:user])
{
[finalBooks setValue:[[data valueForKey:@"ID"] objectAtIndex:i] forKey:@"ID"];
[finalBooks setValue:[[data valueForKey:@"name"] objectAtIndex:i] forKey:@"name"];
[finalBooks setValue:[[data valueForKey:@"Place"] objectAtIndex:i] forKey:@"Place"];
[finalBooks setValue:[[data valueForKey:@"username"] objectAtIndex:i] forKey:@"username"];
[userDictionary setObject:finalBooks forKey:user];
}
}
If you want everything in one dictionary, I suggest you use a unique key such as NSString stringWithFormat:@"ID+%@",username],...[NSString stringWithFormat:@"username+%@",username]
如果您希望在一本字典中包含所有内容，我建议您使用唯一键，例如 NSString stringWithFormat:@"ID+%@",username],...[NSString stringWithFormat:@"username+%@",username]
But it looks messy :)
但它看起来很乱:)
