Question

我想用对象和键创建一个NSDictionary，如下面的例子

NSArray *keys = [NSArray arrayWithObjects:@"key1", @"key2", nil];
NSArray *objects = [NSArray arrayWithObjects:@"value1", @"value2", nil];
NSDictionary *dictionary = [NSDictionary dictionaryWithObjects:objects 
                                                   forKeys:keys];

但我需要添加多个寄存器，例如：

code=1
description=John

code=2
description=Paul

code=3
description=Peter
.
.
.

exactly what I need, an NSDictionary like a json structure:
{
"people": [
{ "code":"1" , "name":"John" }, 
{ "code":"2" , "name":"Smith" }, 
{ "code":"3" , "name":"Jones" }
]
}

Answer 1

如果在编译时值为klnown，则可以使用文字创建结构：

NSDictionary *d = @{
    @"people": @[
        @{ @"code":@"1" , @"name":@"John" },
        @{ @"code":@"2" , @"name":@"Smith" },
        @{ @"code":@"3" , @"name":@"Jones" }
    ]
};
NSLog(@"d: %@", d);

NSLog输出：

dictionary: {
    people =     (
                {
            code = 1;
            name = John;
        },
                {
            code = 2;
            name = Smith;
        },
                {
            code = 3;
            name = Jones;
        }
    );
}

Answer 2

也许你需要创建NSDictionarys的NSArray。

NSArray *keys1 = [NSArray arrayWithObjects:@"code", @"description", nil];
NSArray *objects1 = [NSArray arrayWithObjects:[NSNumber numberWithInt:1], @"Paul", nil];

NSDictionary *register1 = [NSDictionary dictionaryWithObjects:objects1 forKeys:keys1]

NSArray *keys2 = [NSArray arrayWithObjects:@"code", @"description", nil];
NSArray *objects2 = [NSArray arrayWithObjects:[NSNumber numberWithInt:2], @"Tom", nil];

NSDictionary *register2 = [NSDictionary dictionaryWithObjects:objects2 forKeys:keys2];

NSArray *keys3 = [NSArray arrayWithObjects:@"code", @"description", nil];
NSArray *objects3 = [NSArray arrayWithObjects:[NSNumber numberWithInt:3], @"Robin", nil];

NSDictionary *register3 = [NSDictionary dictionaryWithObjects:objects3 forKeys:keys3];
NSArray *registers = @[register1, register2, register3];
NSLog(@"%@", registers);

向nsdictionary添加各种对象和键

2 个答案: