將多個數組放入字典

Question

我使用for循環多次解析CSV文件，這裏我需要將這些數組逐個存儲到字典中。關於將NSArray添加到NSDictionary中，堆棧中的問題非常少。我解析CSV與下面的代碼，但是我在NSDictionary中存儲strucked，該計劃將終止，並顯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]; 

} 

要返回從字典數據，

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

Answer 2

如果我正確理解你，你想添加數組到字典中，其中的鍵值是整數i的字符串值？什麼，你需要做的就是分配你的字典外循環 -

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; 
} 

我不知道你爲什麼會想這樣做，因爲這基本上是一個數組。你可以簡單地做 -

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