让图片自动适应框的大小

NSString *imagePath = [[NSBundlemainBundle] pathForResource:@”test” ofType:@”png”];

UIImage *image =[[UIImage alloc]initWithContentsOfFile:imagePath];

UIImage *newImage = [imagetransformWidth:80.0f height:240.0f];

[image release];

UIImageView *imageView = [[UIImageViewalloc] initWithImage:newImage];

[self.view addSubView:imageView];

[imageView release];