我有一个UIImageView目标是按比例缩小它通过给它一个高度或宽度。
UIImage *image = [[UIImage alloc] initWithData:[NSData dataWithContentsOfURL:[NSURL URLWithString:@"http://farm4.static.flickr.com/3092/2915896504_a88b69c9de.jpg"]]];
UIImageView *imageView = [[UIImageView alloc] initWithImage:image];
//Add image view
[self.view addSubview:imageView];
//set contentMode to scale aspect to fit
imageView.contentMode = UIViewContentModeScaleAspectFit;
//change width of frame
CGRect frame = imageView.frame;
frame.size.width = 100;
imageView.frame = frame;
图像确实调整了大小，但位置不在左上方。缩放image/imageView的最佳方法是什么?我如何纠正位置?
UIImage *image = [[UIImage alloc] initWithData:[NSData dataWithContentsOfURL:[NSURL URLWithString:@"http://farm4.static.flickr.com/3092/2915896504_a88b69c9de.jpg"]]];
UIImageView *imageView = [[UIImageView alloc] initWithImage:image];
//set contentMode to scale aspect to fit
imageView.contentMode = UIViewContentModeScaleAspectFit;
//change width of frame
//CGRect frame = imageView.frame;
//frame.size.width = 100;
//imageView.frame = frame;
//original lines that deal with frame commented out, yo.
imageView.frame = CGRectMake(10, 20, 60, 60);
...
//Add image view
[myView addSubview:imageView];
上面的原始代码在iOS 4.2中运行得很好。
我发现创建一个CGRect并指定所有的顶部，左侧，宽度和高度值是在我的情况下调整位置的最简单的方法，这是在表格单元格中使用UIImageView。(仍然需要添加代码来释放对象)
