Question

这段代码有什么问题？我试图将NSArray中的数据放到NSMutableDictionary中，但我不想先将初始nsarray拆分为两个，然后将数据发送到nsdcitionary。

问题是，当我在NSLog de mutabledictionary时，它只返回1项，它恰好是来自NSArray的最后一个数据。

 NSString *str = @"13:00,2.00,13:05,2.03,13:10,2.07,13:15,2.01,13:20,2.08,13:25,2.10,13:30,2.15";
NSArray *arrayFinal = [str componentsSeparatedByString:@","];

 NSMutableDictionary *dict = [NSMutableDictionary new];
for (int i = 0; i < [arrayFinal count ]; i = i + 2) {
    [dict setObject:[arrayFinal objectAtIndex:i] forKey:@"hora"];
    [dict setObject:[arrayFinal objectAtIndex:i+1] forKey:@"preco"];

}

结果是：

2013-09-04 20:27:33.732 separa[1438:c07] {
hora = "13:30";
preco = "2.15";
}

任何帮助将不胜感激。

Answer 1

您需要每个键指向一个值数组。像这样：

NSString *str = @"13:00,2.00,13:05,2.03,13:10,2.07,13:15,2.01,13:20,2.08,13:25,2.10,13:30,2.15";
NSArray *arrayFinal = [str componentsSeparatedByString:@","];

NSMutableArray *horas = [NSMutableArray new];
NSMutableArray *precos = [NSMutableArray new];
for (int i = 0; i < [arrayFinal count]; i += 2) {
    [horas addObject:arrayFinal[i]];
    [precos addObject:arrayFinal[i + 1]];
}

NSMutableDictionary *dict = [NSMutableDictionary new];
dict[@"hora"] = horas;
dict[@"preco"] = precos;

Answer 2

for (int i = 0; i < [arrayFinal count ]; i = i + 2) {
    [dict setObject:[arrayFinal objectAtIndex:i+1] forKey:[arrayFinal objectAtIndex:i]];
}

Answer 3

您需要将两个（小时和价格）分成他们自己的NSMutableArrays，然后将每个数组存储为其中一个键，如下所示：

NSMutableArray *hora = [NSMutableArray alloc] init];
NSMutableArray *preco = [NSMutableArray alloc] init];

NSString *str = @"13:00,2.00,13:05,2.03,13:10,2.07,13:15,2.01,13:20,2.08,13:25,2.10,13:30,2.15";
NSArray *arrayFinal = [str componentsSeparatedByString:@","];

NSMutableDictionary *dict = [NSMutableDictionary alloc] init];
for (int i = 0; i < [arrayFinal count ]; i = i + 2) 
{
    [hora addObject:[arrayFinal objectAtIndex:i];
    [preco addObject:[arrayFinal objectAtIndex:i+1];
}

[dict setObject:hora forKey:@"hora"];
[dict setObject:preco forKey:@"preco"];

可能不完全是我做的方式，但我认为这是你正在寻找的概念。

无法将NSArray中的所有数据存储到NSMutableDictionary中？

3 个答案: