ios - 如何在 Xcode 中以编程方式添加多个 UILabel？

Question

Hello in Xcode 我正在尝试以编程方式向我的图像添加两个标签，但是当我添加第二个标签时，它将覆盖我的第一个标签。这是我的代码:

    //first label
    UILabel* caption = [[UILabel alloc] initWithFrame:
                        CGRectMake(-25, 0, 320, 50)
                        ];
    caption.backgroundColor = [UIColor whiteColor];
    caption.textColor = [UIColor blackColor];
    caption.textAlignment = UITextAlignmentLeft;
    caption.font = [UIFont systemFontOfSize:16];
    caption.text = [NSString stringWithFormat:@"  @%@",[data objectForKey:@"username"]];
    [self addSubview: caption];

    //second label
    UILabel* bottomBox = [[UILabel alloc] initWithFrame:
                        CGRectMake(-25, -200, 320, 50)
                        ];
    caption.backgroundColor = [UIColor whiteColor];
    caption.textColor = [UIColor blackColor];
    caption.textAlignment = UITextAlignmentCenter;
    caption.font = [UIFont systemFontOfSize:16];
    caption.text = [NSString stringWithFormat:@"  Testing"];
    [self addSubview: bottomBox];

我尝试将“0”更改为 -200 以修改 Y 坐标，以便第二个标签向下移动，但由于某种原因它只是覆盖了第一个标签。非常感谢任何帮助。

Answer 1

第二个标签的所有代码都引用了第一个变量 caption 而不是 bottomBox。你想要:

//second label
UILabel* bottomBox = [[UILabel alloc] initWithFrame:CGRectMake(20, 200, 320, 50)];
bottomBox.backgroundColor = [UIColor whiteColor];
bottomBox.textColor = [UIColor blackColor];
bottomBox.textAlignment = UITextAlignmentCenter;
bottomBox.font = [UIFont systemFontOfSize:16];
bottomBox.text = @"Testing";
[self addSubview: bottomBox];