Imageview frame.origin.x frame.origin.y always return 0,0

Question

I have an imageview predefined on the screen, I want to draw something on top of it, not exactly on it, but next to it, however, when I query [imageview frame.origin.x] and [imageview frame.origin.y] I always get 0, 0 , which is the top left corner of the screen, not the imageview. How do I get the x, y coordinates of the predefined imageview ?

This is my code for querying the image:

 -(void) drawMyImage:(UIImage *)image nextTo:(UIImageView *)imageView{
    CGRect frame = [imageView frame];
    int startX = frame.origin.x+10;
    int startY = frame.origin.y;
    UIImageView *myImageView = [[UIImageView alloc]initWithFrame:CGRectMake(startX,startY,frame.size.width,frame.size.height)];
    myImageView .image = image;
    [myImageView setNeedsDisplay];

}

And my image is always drawn in the top left corner of the screen. How can I fix this?

Answer 1

答案是我在 viewDidLoad 中定义了所有内容，当我应该在 viewDidAppear 中完成时，当 IB 对象有框架时

Answer 2

我认为您应该使用浮点值而不是使用 int。

Answer 3

Try to change [myImageView setNeedsDisplay]; to [imageView addSubView:myImageView];