ios - 以编程方式设置自定义图像大小和位置

Question

我正在尝试制作自定义活动指示器并将大小和位置设置为：（x 坐标 280；y 坐标 5；高度 34；宽度 34）我有代码：

UIImage *statusImage = [UIImage imageNamed:@"activity1.png"];
    UIImageView *activityImageView = [[UIImageView alloc]
                                      initWithImage:statusImage];

            activityImageView.animationImages = [NSArray arrayWithObjects:
                                         [UIImage imageNamed:@"activity1.png"],
                                         [UIImage imageNamed:@"activity2.png"],
                                         [UIImage imageNamed:@"activity3.png"],
                                         [UIImage imageNamed:@"activity4.png"],
                                         [UIImage imageNamed:@"activity5.png"],
                                         [UIImage imageNamed:@"activity6.png"],
                                         [UIImage imageNamed:@"activity7.png"],
                                         [UIImage imageNamed:@"activity8.png"],
                                         [UIImage imageNamed:@"activity9.png"],
                                         [UIImage imageNamed:@"activity10.png"],
                                         [UIImage imageNamed:@"activity11.png"],
                                         [UIImage imageNamed:@"activity12.png"],
                                         [UIImage imageNamed:@"activity13.png"],
                                         [UIImage imageNamed:@"activity14.png"],
                                         [UIImage imageNamed:@"activity15.png"],
                                         [UIImage imageNamed:@"activity16.png"],
                                         [UIImage imageNamed:@"activity17.png"],
                                         [UIImage imageNamed:@"activity18.png"],
                                         nil];

    activityImageView.animationDuration = 0.8;

    [activityImageView startAnimating];

    [self.view addSubview:activityImageView];

这使圆圈和理解我需要代码：

activityImageView.frame = CGRectMake(
                                             self.view.frame.size.width/2
                                             -statusImage.size.width/2,
                                             self.view.frame.size.height/1.2
                                             -statusImage.size.width/1.2,
                                             statusImage.size.width,
                                             statusImage.size.height);

虽然我的问题是我不明白如何使用这段代码将坐标和大小设置为我想要的。非常感谢帮助！

Answer 1

看起来你只需要这样做：

activityImageView.frame = CGRectMake(280, 5, 34, 34);

上面 CGRectMake 调用中的前 2 个参数是视图左上角相对于其父视图的 X 和 Y 坐标。其余参数是所需的视图宽度和高度。

另外，不要忘记将您的图像视图添加到超级视图，例如

[self.view:addSubview:activityImageView];