ios - 如何根据不同的形状拼贴图像

Question

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Answer 1

我只是说说我的逻辑。

• 您的 View 已显示 4 张图像(具有不同的形状) 因此您需要在 .h 文件中获取 4 个 UIImageView 和一个 UIView name is ImgContainerView in .h file

• 确保您的所有按钮都具有相同的操作方法并将所有按钮赋予它的标签。例如每个按钮的方法名称是

  -(void) buttonMethodName:(UIButton *) sender

• 然后你需要创建一个方法名是，

  -(void)setUpimagesByselectedButton:(int) buttonTag

在按钮的action方法中调用该方法，例如

-(void) buttonMethodName:(UIButton *) sender           
{
  [self setUpimagesByselectedButton:sender.tag]; // pass button's tag as parameter.
}

现在在方法中，

-(void)setUpimagesByselectedButton:(int) buttonTag
{
  // first you need to remove all subview of ImgContainerView 
  if(self.ImgContainerView)
  {
    for(UIView *subview in self.ImgContainerView.subviews)
        [subview removeFromSuperview];
    [self.ImgContainerView removeFromSuperview]; self.ImgContainerView = nil;
  }
  // Then re-create  ImgContainerView with background color is white;
  // add all UIImageView as subView of ImgContainerView;
  // and then set FRAME of your UIImageView base on selected button's tag such like.
  if(buttonTag == 1)// for ex. i take 1, here you write your button's tag.
    self.imageView1.frame....
  // create one by one imageView and set it's frame by put condition as above       
  // your UIImageView's contentMode should be  UIViewContentModeScaleAspectFill or UIViewContentModeCenter;
}

当您点击任何按钮时，每次 ImgContainerView 都会重新创建它的特定形状。