Apple's new place of OC for a high-level programming language!
In the development off the grid when the input method macOS，I encountered a problem of a more wonderful，This problem has plagued me now - the time when some places need to display a row of vertically centered text，How to make these characters real "center"?
At first glance this seems to make much sense，Well ...... like vertical center，On macOS [crayon-661ee9411b5089[……]
When developed using Swift input pocketed，I met a very interesting question -Deduplication。
All to known，Candidate input method in the calculation will always be out there may be a duplicate options (such as code table and have a word in the lexicon，They may be different coding，But the word is the same and the like)，This time you need to re，But while keeping the same order of candidates。
If you go online to find，Then[……]
Two years ago，I wrote an article entitled "ios VoiceOver support for visually impaired users"Articles，Inside describes how iOS end of the necessary support for VoiceOver，Then I developed a macOS input terminal pocketed，But unfortunately due macOS own system bug，Third-party input method can not obtain focus VoiceOver (mainly[……]
Ado，Directly on the code。
GET：
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// 创建一个会话，这个会话可以复用 let session = URLSession(configuration: .default) // 设置URL let url = "http://127.0.0.1/api/" var UrlRequest = URLRequest(url: URL(string: url)!) // 创建一个网络任务 let task = session.dataTask(with: UrlRequest) {(data, response, error) in do { // 返回的是一个json，将返回的json转成字典r let r = try JSONSerialization.jsonObject(with: data!, options: []) as! NSDictionary print(r) } catch { // 如果连接失败就... print("无法连接到服务器") return } } // 运行此任务 task.resume() |
POST：
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// 这个session可以使用刚才创建的。 let session = URLSession(configuration: .default) // 设置URL let url = "http://127.0.0.1/api/" var request = URLRequest(url: URL(string: url)!) request.setValue("application/x-www-form-urlencoded", forHTTPHeaderField: "Content-Type") request.httpMethod = "POST" // 设置要post的内容，字典格式 let postData = ["email":"user@xxx.com","password":"123456"] let postString = postData.compactMap({ (key, value) -> String in return "\(key)=\(value)" }).joined(separator: "&") request.httpBody = postString.data(using: .utf8) // 后面不解释了，和GET的注释一样 let task = session.dataTask(with: request) {(data, response, error) in do { let r = try JSONSerialization.jsonObject(with: data!, options: JSONSerialization.ReadingOptions.mutableContainers) as! NSDictionary print(r) } catch { print("无法连接到服务器") return } } task.resume() |
[……]
Today, the group participants Someone made such a problem，Why use the characteristic dictionary type as a generic type constraint，It will inevitably error?
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inheritance from non-protocol, non-class type 'Dictionary<String, Any>' |
Obviously，He said very clearly，"You can not be from a non-agreement、Non-type class inheritance. "。Obviously，The dictionary is a generic structure...
Then the solution is also very clear ideas，Create[……]
Pocketed in the development process input，I have always been plagued by a problem，That is when the user clicks on the left edge of the screen， UIButton of touchDown event almost turned into a [pencil-6[……]
Among developing pocketed input process macOS，I have been plagued by a strange question - text blurred。
No matter how I debug，Pocketed candidate text input method can not achieve the original text as clear and sharp。After a big ask God，The resulting experience is to see live a long time - upstreamSub-pixel rendering bug。
In many platforms have similar problems，macOS[……]
In iOS development，We often use Timer This class，For some repeat or delayed call。
but，In actual use，If you are used to periodically update the UI，Will be found Timer Call often[……]
In iOS 10 after，iOS uses a new UserNotifications As the notification API，This allows developers to use images、video、Sound and other rich media content as the notification，While further，You can also use the Notification Content Ex[……]