将多个数组放入字典

Question

我使用for循环多次解析CSV文件，这里我需要将这些数组逐个存储到字典中。关于将NSArray添加到NSDictionary中，堆栈中的问题非常少。我解析CSV与下面的代码，但是我在NSDictionary中存储strucked，该计划将终止，并显示警告在指定字符串字典

for (i=0; i<=57; i++) { 
    NSString *keysString = [csvArray objectAtIndex:i]; 
    NSArray *keysArray = [keysString componentsSeparatedByString:@","]; 
    NSLog(@"Serail No %d %@",i,keysArray); 
    NSString *string = [NSString stringWithFormat:@"%d", i]; 
    NSMutableDictionary *dict = [NSMutableDictionary dictionaryWithObjects: keysArray forKeys: string]; 
    } 

Answer 1

NSMutableDictionary *dict = [[NSMutableDictionary alloc]init]; 

for (i=0; i<=57; i++) { 
NSString *keysString = [csvArray objectAtIndex:i]; 
NSArray *keysArray = [keysString componentsSeparatedByString:@","]; 
NSString *key = [NSString stringWithFormat:@"serial%d",i]; 
[dict setObject:keysArray forKey:key]; 

} 

要返回从字典数据，

NSArray *array = [dict valueForKey:@"serial24"];//to get array 24. 

Answer 2

如果我正确理解你，你想添加数组到字典中，其中的键值是整数i的字符串值？什么，你需要做的就是分配你的字典外循环 -

NSMutableDictionary *dict=[NSMutableDictionary new]; 
for (i=0; i<=57; i++) { 
    NSString *keysString = [csvArray objectAtIndex:i]; 
    NSArray *keysArray = [keysString componentsSeparatedByString:@","]; 
    NSLog(@"Serial No %d %@",i,keysArray); 
    NSString *string = [NSString stringWithFormat:@"%d", i]; 
    dict[string]=keysArray; 
} 

我不知道你为什么会想这样做，因为这基本上是一个数组。你可以简单地做 -

NSMutableArray *outputArray=[NSMutableArray new]; 
for (NSString *keysString in csvArray) { 
    NSArray *keysArray = [keysString componentsSeparatedByString:@","]; 
    [outputArray addObject:keysArray]; 
}