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目前，

我在我的应用程序中实现了一项功能，该功能可以在 UIView 的子视图中动态分配具有 2 个 UILabel 的 UIViews ......我之前已经这样做了，但由于某种原因似乎被困在了这个问题上。

这是我的代码：

UIView *view;
UILabel *label;
UILabel *powerOutput;

for (int i = 1; i < [[_detailsArray objectAtIndex:1] count]; i++)
{
    view = [[UIView alloc] initWithFrame:CGRectMake((i-1)*100 + 5, 10, 90, 100)];
    view.backgroundColor = [UIColor blackColor];

    label = [[UILabel alloc] init];
    label.frame = CGRectMake(view.frame.origin.x + 5, view.frame.origin.y + 2, view.frame.size.width - 10, 20);
    label.backgroundColor = [UIColor clearColor];
    label.font = [UIFont systemFontOfSize:10];
    label.textColor = [UIColor whiteColor];
    powerOutput.textAlignment = NSTextAlignmentCenter;
    label.text = [NSString stringWithFormat:@"SN %@", [[[_detailsArray objectAtIndex:1] objectAtIndex:i] objectForKey:@"sn"]];
    [powerOutput setTag:LABEL_TAG+i];
    NSLog(@"%@", label.text);
    [view addSubview:label];

    powerOutput = [[UILabel alloc] init];
    powerOutput.frame = CGRectMake(view.frame.origin.x + 5, view.frame.origin.y + 50, view.frame.size.width - 10, 20);
    powerOutput.backgroundColor = [UIColor clearColor];
    powerOutput.font = [UIFont systemFontOfSize:10];
    powerOutput.textColor = [UIColor whiteColor];
    powerOutput.textAlignment = NSTextAlignmentCenter;
    powerOutput.text = [NSString stringWithFormat:@"%@W", [[[_detailsArray objectAtIndex:1] objectAtIndex:i] objectForKey:@"Pout_W"]];
    [powerOutput setTag:IMAGE_TAG+i];
    NSLog(@"%@", powerOutput.text);
    [view addSubview:powerOutput];

    [self.view addSubview:view];


}

for (int i = 1; i < [[_detailsArray objectAtIndex:1] count]; i++) {

    UILabel *label = (UILabel *)[self.view viewWithTag:LABEL_TAG+i]; // get the label with tag
    //NSLog(@"%@", label);
    label.text = [NSString stringWithFormat:@"SN %@", [[[_detailsArray objectAtIndex:1] objectAtIndex:i] objectForKey:@"sn"]];
    //NSLog(@"%@", label.text);

    UILabel *powerOutputLabel = (UILabel *)[self.view viewWithTag:IMAGE_TAG+i]; // get the label with tag
    powerOutputLabel.text = [NSString stringWithFormat:@"%@W", [[[_detailsArray objectAtIndex:1] objectAtIndex:i] objectForKey:@"Pout_W"]];
    //NSLog(@"%@", powerOutputLabel.text);
}

我也试过：

UIView *view;
UILabel *label;
UILabel *powerOutput;

for (int i = 1; i < [[_detailsArray objectAtIndex:1] count]; i++)
{
    view = [[UIView alloc] initWithFrame:CGRectMake((i-1)*100 + 5, 10, 90, 100)];
    view.backgroundColor = [UIColor blackColor];

    label = [[UILabel alloc] init];
    label.frame = CGRectMake(view.frame.origin.x + 5, view.frame.origin.y + 2, view.frame.size.width - 10, 20);
    label.backgroundColor = [UIColor clearColor];
    label.font = [UIFont systemFontOfSize:10];
    label.textColor = [UIColor whiteColor];
    powerOutput.textAlignment = NSTextAlignmentCenter;
    label.text = [NSString stringWithFormat:@"SN %@", [[[_detailsArray objectAtIndex:1] objectAtIndex:i] objectForKey:@"sn"]];
    //[powerOutput setTag:LABEL_TAG+i];
    NSLog(@"%@", label.text);
    [view addSubview:label];

    powerOutput = [[UILabel alloc] init];
    powerOutput.frame = CGRectMake(view.frame.origin.x + 5, view.frame.origin.y + 50, view.frame.size.width - 10, 20);
    powerOutput.backgroundColor = [UIColor clearColor];
    powerOutput.font = [UIFont systemFontOfSize:10];
    powerOutput.textColor = [UIColor whiteColor];
    powerOutput.textAlignment = NSTextAlignmentCenter;
    powerOutput.text = [NSString stringWithFormat:@"%@W", [[[_detailsArray objectAtIndex:1] objectAtIndex:i] objectForKey:@"Pout_W"]];
    //[powerOutput setTag:IMAGE_TAG+i];
    NSLog(@"%@", powerOutput.text);
    [view addSubview:powerOutput];

    [self.view addSubview:view];


}

这不应该有任何问题，因为当我创建一个新视图时，我会创建一个新的 UILabel 并将其添加到 NEW UIView ...

这是一张照片：

模拟器图片

所以我创建了三个视图，好吧……但是我的 3 个 UILabel 在哪里……还有一个文本的日志声明：

2013-07-16 18:14:26.945 PowerOneApp[14307:c07] SN 875222
2013-07-16 18:14:26.945 PowerOneApp[14307:c07] 53.50W
2013-07-16 18:14:26.946 PowerOneApp[14307:c07] SN 875225
2013-07-16 18:14:26.946 PowerOneApp[14307:c07] 59.89W
2013-07-16 18:14:26.946 PowerOneApp[14307:c07] SN 957188
2013-07-16 18:14:26.947 PowerOneApp[14307:c07] 135.39W

真的不知道为什么这不能正常工作......有人有什么想法吗？在这一点上，这似乎是一件非常微不足道的事情，就像一行代码之类的......我在使用具有多个这样的视图的标签之前已经这样做了，并且对于不同的 UIViews 具有不同的值，并且 UILabels 值随着关于我实现的 UISlider。

所以我对这个问题有一些经验，但我现在很困惑。也许明天我会明白我做错了什么，但目前......我真的不确定......如果有人可以指点......请这样做:)

4

2 回答 2

2

您错误地设置了标签框架：

label.frame = CGRectMake(view.frame.origin.x + 5, view.frame.origin.y + 2, view.frame.size.width - 10, 20);

Frame 已经相对于父视图，因此当您添加父视图的原点x和y时，您的标签会超出可见范围。这适用于第一个视图，因为它x很小y。

你可能想写：

label.frame = CGRectMake(10, 12, view.frame.size.width - 10, 20);

第二个标签也是如此。

于 2013-07-17T01:34:04.490 回答
0 
label.textColor = [UIColor whiteColor];

***powerOutput.textAlignment = NSTextAlignmentCenter;***

label.text = [NSString stringWithFormat:@"SN %@", [[[_detailsArray objectAtIndex:1] objectAtIndex:i] objectForKey:@"sn"]];

当语句**powerOutput.textAlignment = NSTextAlignmentCenter;** 第一次运行时，您的变量**powerOutput**是**nil**.

于 2013-07-17T02:16:14.837 回答