我想创建一个正则表达式来提取网址的文件名
https://example.net/img/src/img.jpg
我想提取img1.jpg
我使用python中的urlparse，但它以这种方式提取路径
img/src/img.jpg
如何使用正则表达式
提取文件名答案 0 :(得分：3)
使用class SearchReuseView: UICollectionReusableView {
weak var delegate: SearchReuseDelegate?
let adImageView: UIImageView = {
let img = UIImageView()
img.translatesAutoresizingMaskIntoConstraints = false
img.contentMode = .scaleAspectFit
return img
}()
override init(frame: CGRect) {
super.init(frame: frame)
self.setupViews()
}
required init(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)!
self.setupViews()
}
func setupViews() {
backgroundColor = .black
adImageView.isUserInteractionEnabled = true
adImageView.addGestureRecognizer(UITapGestureRecognizer(target: self, action: #selector(handleTap)))
self.addConstraint(NSLayoutConstraint(item: self, attribute: .bottom, relatedBy: .equal, toItem: self.adImageView, attribute: .bottom, multiplier: 1, constant: 0))
self.addConstraint(NSLayoutConstraint(item: self, attribute: .right, relatedBy: .equal, toItem: self.adImageView, attribute: .right, multiplier: 1, constant: 0))
self.addConstraint(NSLayoutConstraint(item: self, attribute: .top, relatedBy: .equal, toItem: self.adImageView, attribute: .top, multiplier: 1, constant: 0))
self.addConstraint(NSLayoutConstraint(item: self, attribute: .left, relatedBy: .equal, toItem: self.adImageView, attribute: .left, multiplier: 1, constant: 0))
addSubview(adImageView)
}
var item: Banner! {
didSet {
guard let img = item.img else {return}
let url = URL(string: "\(img)")
self.adImageView.kf.setImage(with: url, placeholder: nil, options: [.transition(ImageTransition.fade(1))], progressBlock: { (receivedSize, totalSize) in
}) { (image, error, cacheType, imageURL) in
if error != nil {}
}
}
}
@objc func handleTap(){
guard let link = item.link else {
return
}
delegate?.didTapAds(link: link)
}
}
和否定索引
str.split<强>输出：
url = "https://example.net/img/src/img.jpg"
print(url.split("/")[-1])
或使用img.jpg
os.path.basename答案 1 :(得分：0)
如果您的网址格式是静态的，则可以使用正向前瞻
import re
pattern =r'\w+(?=\.jpg)'
text="""https://example.net/img/src/img.jpg
"""
print(re.findall(pattern,text)[0])
输出：
img