When you display an image in a UIImageView. The UIViewContentMode decides the rule of displaying.
e.g. To make the image scale aspect fit in the imageView, just set UIImageView's contentMode property to UIViewContentModeScaleAspectFit.
imageView.contentMode = UIViewContentModeScaleAspectFit;
To make the image align top of the imageView, just set UIImageView's contentMode property to UIViewContentModeTop. (The image itself is big!)
imageView.contentMode = UIViewContentModeTop;
However, what if you would like to make it both fit in the imageView and then align top ? Obviously There is no option like UIViewContentModeScaleAspectFitTop provided by the UIViewContentMode enum type.
This is a new enum type defined by NS_OPTIONS macro. To achieve both fit and align top effect, just set it's yj_contentMode property:
imageView.yj_contentMode = YJViewContentModeScaleAspectFit | YJViewContentModeTop;
Write one line of code, you get the result like this:
There are a lot of combinations you can specify like (Fit | Top | Left). Once your combinations encounter the conflict, e.g. (Fit | Fill) or (Top | bottom), it automatically filtering the result by giving up some of the options.
ARC enabled
UIImageView_YJ is available through CocoaPods. To install it, simply add the following line to your Podfile:
pod "UIImageView_YJ"huang-kun, jack-huang-developer@foxmail.com
UIImageView_YJ is available under the MIT license. See the LICENSE file for more info.