如何比较两种不同值的射线？

Question

嗨我有两条线。

阵列A：

 arrProductSelection = [[NSArray alloc]initWithObjects:@"English",@"German",@"Russian",@"Chinese",@"Spanish",@"French",@"French",@"French",@"French",@"French",@"French",@"French",@"French",nil];

阵列B：

arrProductSelectionB = [[NSArray alloc]initWithObjects:@"deselcted",@"selected",@"selected",@"selected",@"deselcted",@"deselcted",@"deselcted",@"deselcted",@"deselcted",@"deselcted",@"deselcted",@"deselcted",@"deselcted",nil];

我需要比较两个数组，并从数组A中获得值，方法是将数组B与所选的值进行比较。也就是说，我应该把德语、汉语和俄语用逗号作为nsstring。

Answer 1

试试这个：

NSMutableArray *arrSelected = [[NSMutableArray alloc] init];

NSArray *arrProductSelection = [[NSArray alloc]initWithObjects:@"English",@"German",@"Russian",@"Chinese",@"Spanish",@"French",@"French",@"French",@"French",@"French",@"French",@"French",@"French",nil];

NSArray *arrProductSelectionB = [[NSArray alloc]initWithObjects:@"deselcted",@"selected",@"selected",@"selected",@"deselcted",@"deselcted",@"deselcted",@"deselcted",@"deselcted",@"deselcted",@"deselcted",@"deselcted",@"deselcted",nil];

for(int i = 0; i< arrProductSelectionB.count-1;i ++) {
    if ([arrProductSelectionB[i] isEqualToString:@"selected"]) {
        [arrSelected addObject:arrProductSelection[i]];
    }
}

NSString *strSelected = [arrSelected componentsJoinedByString:@","];

NSLog(@"%@", strSelected);//output: German,Russian,Chinese

Answer 2

首先，我将确保两个数组具有相同的安全计数器，比如

if (arrProductSelection.count == arrProductSelectionB) {

//than all you need is one for cycle something like  :

    for (int i = 0; i < arrProductionSelectionB.count; i++) {
         if ([arrProductionSelectionB[i] isEqualToString: @"selected"]) {
         do something magically with arrProductSelection[i];
     }
   }
}

Answer 3

如果您可以使这种类型的数组，然后管理容易。

(
        {
        flag = deselcted;
        name = English;
    },
        {
        flag = selected;
        name = German;
    },
        {
        flag = deselcted;
        name = Russian;
    },
        {
        flag = deselcted;
        name = Chinese;
    }
)

==>数组(字典)，(字典)，.