iOS Swift - UIImageView 无法设置 ContentMode

Question

我正在使用 CIFilter 为图像添加滤镜。过滤图像后的结果图像大小如下:CGRectMake(10, 10, 70, 70)。我无法将生成的图像内容模式设置为 ScaleAspectFill。这是代码:

    filter2image.frame = CGRectMake(90, 10, 70, 70)
    let filter2data = CIFilter(name: "CIPhotoEffectChrome")
    filter2data.setValue(CIImage(image: imageView.image), forKey: kCIInputImageKey)
    self.filter2image.image = UIImage(CIImage: filter2data.outputImage)
    filter2image.contentMode = UIViewContentMode.ScaleAspectFill

Answer 1

设置 contentMode 后尝试更改框架。像这样:

let filter2data = CIFilter(name: "CIPhotoEffectChrome")
filter2data.setValue(CIImage(image: imageView.image), forKey: kCIInputImageKey)
self.filter2image.image = UIImage(CIImage: filter2data.outputImage)
filter2image.contentMode = UIViewContentMode.ScaleAspectFill
filter2image.frame = CGRectMake(90, 10, 70, 70)