如何创建UILabels的NSMutableArray？

问题描述

我在这里有问题。我正在动态创建UILabels以显示在UIView中。下面是代码：

  for（flower in flowerList）
 {
 
创建数量标签
 CGRect rectQty = CGRectMake（x，y，25，labelHeight）; 
 UILabel * flowerQuantityLabel = [[UILabel alloc] initWithFrame：rectQty]; 
 NSString * fQty = [[NSString alloc] initWithFormat：@％d，flower.flowerQty]; 
 [flowerQuantityLabel setText：fQty]; 
 //将refrence载入数组
 //这里是问题
 [flowersQtyLabels addObject：flowerQuantityLabel]; 
 
 //创建名称标签
 CGRect rectName = CGRectMake（（x + offset），y，labelWidth，labelHeight）; 
 UILabel * flowerNameLabel = [[UILabel alloc] initWithFrame：rectName]; 
 [flowerNameLabel setText：flower.flowerName]; 
 
 y = y + 40.0; 
 [self.view addSubview：flowerQuantityLabel]; 
 [self.view addSubview：flowerNameLabel]; 
 
} 
  

• 元素数


• 我需要重新计算flower.flowerQty，并将结果更新为标签（flowerQuantityLabel）。


• 以将每个flowerQuantityLabel的引用加载到NSMuttableArray（flowersQtyLabels）中，以便使用重新计算的结果更改其内容。


• 在for结束时，数组flowersQtyLabels为空。我不知道是什么问题。

我希望有人能帮助我。

解决方案

我的错误，我的NSMuttableArray未正确初始化。

b $ b

I have a problem here. I'm creating UILabels dynamically to be displayed into a UIView. Here is the code:

for (flower in flowerList)
{

    // Create the Qty label
    CGRect rectQty = CGRectMake(x , y, 25, labelHeight);
    UILabel *flowerQuantityLabel = [[UILabel alloc] initWithFrame:rectQty];
    NSString *fQty = [[NSString alloc] initWithFormat:@"%d", flower.flowerQty];
    [flowerQuantityLabel setText:fQty];
    // Loading refrence into a array
        // here is the problem
    [flowersQtyLabels addObject:flowerQuantityLabel];

    // Create the name label
    CGRect rectName = CGRectMake((x+offset) , y, labelWidth, labelHeight);
    UILabel *flowerNameLabel = [[UILabel alloc] initWithFrame:rectName];
    [flowerNameLabel setText:flower.flowerName];

    y = y + 40.0;
    [self.view addSubview:flowerQuantityLabel];
    [self.view addSubview:flowerNameLabel];

}

• The number of elements in the array changes every time.
• I need to recalculate "flower.flowerQty" and update the result into the label (flowerQuantityLabel).
• I tried to load a reference to each flowerQuantityLabel into a NSMuttableArray (flowersQtyLabels), in order to change its content with the result of the recalculation.
• At the end of the for, the array flowersQtyLabels is empty. I do not know what the problem is.

I hope some one can help me.

解决方案

My mistake, I had the NSMuttableArray not initialized properly.

Thanks!!!

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