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事件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];

这使圈子明白我需要代码:

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);

尽管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。帮助非常感谢!

Answer 1

看起来你只需要做:

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

上面 CGRectMake 调用中的前 2 个参数是 View 左上角相对于其父 View 的 X 和 Y 坐标。其余参数是 View 的所需宽度和高度。

此外，不要忘记将 ImageView 添加到父 View ，例如

[self.view:addSubview:activityImageView];