iPhone - 设置UIImage位置 [英] iPhone - Set UIImage position

问题描述

我希望每次按下按钮时都会移动一个图像。它应该每次移动一个设定的像素值。

我希望image1现在有一个位置属性，但据我所知，它并没有。

  UIImageView * image1 = [[UIImageView alloc] initWithImage：[UIImage imageNamed：@indicator]]; 
 [self.view addSubview：image1]; 
 ... 
  

谢谢

编辑： UIImageView * image1 = [[UIImageView alloc] ...

解决方案

当其他两个回答状态时，您可以使用框架（或CGRect）设置UIImageView的初始位置。请注意，CGRectMake的参数是; x位置，y位置，x维度，y维度。

  UIImageView * imgView = [[UIImageView alloc] initWithFrame：CGRectMake（10 ，10,100,100）]; 
 [imgView setImage：[UIImage imageNamed：image.png]]; 
  

要在每次按下按钮时移动图像，每次都需要更新帧按下按钮。但是，框架的x和y坐标是只读的，因此您需要创建一个新框架，如下所示：

  CGRect oldFrame = imgView.frame; 
 CGRect newFrame = CGRectMake（oldFrame.origin.x + 10，oldFrame.origin.y，oldFrame.size.width，oldFrame.size.height）; 
 imgView.frame = newFrame; 
  

请注意，此代码将图像向右移动10个点（沿x轴）。 / p>

I want to have an image that moves each time I hit a button. It should move a set value of pixels each time.

I was hoping that image1 now would have a position property, but as far as I can see it doesnt't.

  UIImageView *image1=[[UIImageView alloc] initWithImage:[UIImage imageNamed:@"indicator"]];
  [self.view addSubview:image1];
...

Thank you

EDIT: UIImageView *image1=[[UIImageView alloc]...

解决方案

As the other two answers state, you can set the initial position of a UIImageView using a frame (or CGRect). Note that the parameters for the CGRectMake are; x position, y position, x dimension, y dimension.

UIImageView *imgView = [[UIImageView alloc] initWithFrame:CGRectMake(10, 10, 100, 100)];
[imgView setImage:[UIImage imageNamed:"image.png"]];

To move the image each time you press a button, you'll need to update the frame each time the button is pressed. However, the x and y coordinates of a frame are read only, so you'll need to create a new frame like so:

CGRect oldFrame = imgView.frame;
CGRect newFrame = CGRectMake(oldFrame.origin.x + 10, oldFrame.origin.y, oldFrame.size.width, oldFrame.size.height);
imgView.frame = newFrame;

Note that this code moves the image 10 points to the right, (along the x axis).

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