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我有两张图片,一张是纵向模式,另一张是横向模式。发生移动设备视图旋转时切换这些图像的最佳方式是什么?

目前我只显示肖像图像。当设备旋转到横向模式时,纵向图像被简单地拉伸。

我是否应该在方向旋转处理程序中检查并简单地将图像重置为正确的方向图像(即根据方向手动设置)?

谢谢!

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1 回答 1

2

我找到了三种方法。我认为最后一种更好

1:自动调整大小

例子:

UIImageView *myImageView=[[UIImageView alloc] initWithImage:[UIImage imageNamed:@"yourImage.png"]];    
myImageView.frame = self.view.bounds;
myImageView.autoresizingMask=UIViewAutoresizingFlexibleWidth|UIViewAutoresizingFlexibleHeight
myImageView.contentMode = UIViewContentModeScaleAspectFill;    
[self.view addSubview:myImageView]; 
[imageView release];

2:CGAffineTransformMakeRotation

例子:

-(void)willRotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation 
                                        duration:(NSTimeInterval)duration {
  if (toInterfaceOrientation == UIInterfaceOrientationLandscapeLeft) {        
                myImageView.transform = CGAffineTransformMakeRotation(M_PI / 2);
  }
  else if (toInterfaceOrientation == UIInterfaceOrientationLandscapeRight){
                myImageView.transform = CGAffineTransformMakeRotation(-M_PI / 2);
  }
  else {
             myImageView.transform = CGAffineTransformMakeRotation(0.0);
  }
}

3:在 Interface Builder 中将 myImageView 的自动调整大小设置为自动填充屏幕

例子:

-(void)didRotateFromInterfaceOrientation:(UIInterfaceOrientation)fromInterfaceOrientation {
if((self.interfaceOrientation == UIDeviceOrientationLandscapeLeft) || (self.interfaceOrientation == UIDeviceOrientationLandscapeRight)){
    myImageView.image = [UIImage imageNamed:@"myImage-landscape.png"];
} else  if((self.interfaceOrientation == UIDeviceOrientationPortrait) || (self.interfaceOrientation == UIDeviceOrientationPortraitUpsideDown)){
    myImageView.image = [UIImage imageNamed:@"myImage-portrait.png"];
} }

在此处查看更多解决方案

developer.apple 解决方案在这里

于 2012-07-31T05:43:02.243 回答