ios 将 url 转换为 UIImage Swift3
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/44063314/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
提示：将鼠标放在中文语句上可以显示对应的英文。显示中英文
时间：2020-08-31 09:08:26 来源:igfitidea点击:
Convert url to UIImage Swift3
提问by user7778093
I try to convert url to UIImage by using following code :
我尝试使用以下代码将 url 转换为 UIImage：
let url = URL(string: "http://www.apple.com/euro/ios/ios8/a/generic/images/og.png")
let sessionTask = URLSession.shared
let request = URLRequest(url: url!)
let task = sessionTask.dataTask(with: request, completionHandler: {(data: Data?, response: URLResponse?, error: Error?) -> Void in
if (error == nil) {
let image: UIImage = UIImage(data: data!)!
}
})
task.resume()
but it's not work for me, if-loop is not complied.
但这对我不起作用，不遵守 if-loop 。
回答by KKRocks
Try this
尝试这个
let url = URL(string:"http://www.apple.com/euro/ios/ios8/a/generic/images/og.png")
if let data = try? Data(contentsOf: url!)
{
let image: UIImage = UIImage(data: data)
}
With Background thread
带后台线程
DispatchQueue.global(qos: .background).async {
do
{
let data = try Data.init(contentsOf: URL.init(string:"url")!)
DispatchQueue.main.async {
let image: UIImage = UIImage(data: data)
}
}
catch {
// error
}
}
回答by Ved Rauniyar
Try this by using SDWebImage
使用SDWebImage试试这个
imageView.sd_setImage(with: URL(string: "http://www.apple.com/euro/ios/ios8/a/generic/images/og.png"), placeholderImage: UIImage(named: "placeholder.png"))
