我通过 1 个 IBAction 生成了一些不可变数组，但是当我从同一类中的另一个 IBAction 引用它们时，我无法检索答案。我在第一个 Action 中创建的部分代码是:

所有数组都在第一个 IBAction 中初始化。这是 vType 的示例:

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

// Gather components for Value Calculations  

//NSLog(@" myInv count(h) = %lu and catDetail count(g) = %lu", (unsigned long)[myInv count], (unsigned long)[catDetail count]);

for (h = 0; h < [myInv count]; h++){

    //NSLog(@"vScott objectAtIndex:h = %@ AT %d", [vScott objectAtIndex:h], h);

    for (g = 0; g < [catDetail count]; g++){

        //NSLog(@"cvScott objectAtIndex:g = %@ AT %d", [cvScott objectAtIndex:g], g);

        //NSLog(@"vScott objectAtIndex:h = %@ AT %d", [vScott objectAtIndex:h], h);

        if ([[vScott objectAtIndex:h] isEqualToString:[cvScott objectAtIndex:g]]){

            [vSerStart insertObject:[cvSerStart objectAtIndex:g] atIndex:h];
            [vType insertObject:[cvType objectAtIndex:g] atIndex:h];
            [vUnitCost insertObject:[cvFacePrice objectAtIndex:g] atIndex:h];
            [vYear insertObject:[cvYear objectAtIndex:g] atIndex:h];

            //NSLog(@"vScott (vIndex) / cvScott (cvIndex) = %@ (%d) / %@ (%d)", [vScott objectAtIndex:h], h,[cvScott objectAtIndex:g],g);
            //NSLog(@"cvSerStart Object %@ atIndex:p = %d",[cvSerStart objectAtIndex:g], g);
            //NSLog(@"cvType Object %@ atIndex:p = %d",[cvType objectAtIndex:g], g);
            //NSLog(@"vScott / vSerStart / vType // AT (myInv) Index p =  %@ / %@ / %@ // %d", [vScott objectAtIndex:h],[vSerStart objectAtIndex:h], [vType objectAtIndex:h],h);
            //NSLog(@"+++++++++++++++++++++++++++++++++++++++++");


            //NSLog(@" The value calculation Scott Numbers are:%@ * %@ * %@ * %@ * %@ * %@ * %@ * %@ * %@ * %@ * %@ * %@ * %@ * %@",[vScott objectAtIndex:h], [vExt objectAtIndex:h], [vSer objectAtIndex:h], [vNew objectAtIndex:h], [vUsed objectAtIndex:h], [vPlate objectAtIndex:h], [vSht objectAtIndex:h], [vSerPrice objectAtIndex:h], [vNewPrice objectAtIndex:h], [vUsedPrice objectAtIndex:h], [vPBPrice objectAtIndex:h], [vShtPrice objectAtIndex:h], [vSerStart objectAtIndex:h],[vType objectAtIndex:h]);

            vOutLine = [NSString stringWithFormat:@"%@, %@, %@, %@, %@, %@, %@, %@, %@, %@, %@, %@, %@, %@, %@, %@", [vScott objectAtIndex:h], [vYear objectAtIndex:h], [vExt objectAtIndex:h], [vType objectAtIndex:h], [vSer objectAtIndex:h],[vNew objectAtIndex:h], [vUsed objectAtIndex:h], [vPlate objectAtIndex:h], [vSht objectAtIndex:h], [vUnitCost objectAtIndex:h], [vSerPrice objectAtIndex:h], [vNewPrice objectAtIndex:h], [vUsedPrice objectAtIndex:h], [vPBPrice objectAtIndex:h], [vShtPrice objectAtIndex:h], [vSerStart objectAtIndex:h]];

    //NSLog(@"vOutLine = %@", vOutLine);
    NSLog(@"%@",[vType objectAtIndex:h]);

    [valueData addObject:vOutLine];

可变数组 (vType) 的结果是:

2014-10-24 23:00:53.233 Stamp Collection[6313:1331161] C
2014-10-24 23:00:53.233 Stamp Collection[6313:1331161] C
2014-10-24 23:00:53.233 Stamp Collection[6313:1331161] C
2014-10-24 23:00:53.233 Stamp Collection[6313:1331161] C

尝试在我使用此代码测试的同一个类中使用存储在第二个操作中的值:

- (IBAction)btnValueCollectionDataTable:(id)sender {

    int k,l,m,n;
    NSMutableArray *vType;

    //if ([[vScott objectAtIndex:h] isEqualToString:[cvScott objectAtIndex:g]]

    for (k = 0; k < [myInv count]; k++){

        NSLog(@"%@",[vType objectAtIndex:k]);
        //if ([[vType objectAtIndex:k] isEqualToString:@"C"]){

           //convert required elements to Integer


           //calculate required elements

    //}else{

    }
}

vType 数组的这次试验结果是:

2014-10-24 23:01:00.634 Stamp Collection[6313:1331161] (null)
2014-10-24 23:01:00.634 Stamp Collection[6313:1331161] (null)
2014-10-24 23:01:00.634 Stamp Collection[6313:1331161] (null)
2014-10-24 23:01:00.634 Stamp Collection[6313:1331161] (null)

我认为一旦在类中初始化，数组就可以在任何地方使用。当我被困在这里时，我将不胜感激。

最佳答案

只是 NSMutableArrays 被声明为每个方法的本地。如果你想从多个方法访问相同的 NSMutableArray，请将其作为类的属性(或实例变量)。

您需要阅读变量作用域的基础知识。

关于ios - 2 个按钮操作中 1 个类中的可变数组，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/26559120/