here are copys from the topic of title.
1.api-client網絡請求類
let session = NSURLSession(configuration: NSURLSessionConfiguration.defaultSessionConfiguration())
let request = NSURLRequest(URL: NSURL(string: "http://yourapi.com/endpoint")!)
let task: NSURLSessionDataTask = session.dataTaskWithRequest(request) { (data, response, error) -> Void in
if let data = data {
let response = NSString(data: data, encoding: NSUTF8StringEncoding)
print(response)
}
}.resume()
2.background-threads.txt 后臺處理然后主線程UI刷新
let priority = DISPATCH_QUEUE_PRIORITY_DEFAULT
dispatch_async(dispatch_get_global_queue(priority, 0)) {
// do some task
dispatch_async(dispatch_get_main_queue()) {
// update some UI
}
}
3.completion-handlers.txt 完成處理block
func hardProcessingWithString(input: String, completion: (result: String) -> Void) {
...
completion("we finished!")
}
4.dependency-injection.txt 依賴注入？其實我不懂這一塊。
class PreparedViewController: UIViewController {
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
let dest = segue.destinationViewController
let prepProps = Mirror(reflecting: dest).children.filter { ($0.label ?? "").hasPrefix("prepCtx") }
for prop in prepProps {
let selfProps = Mirror(reflecting: self).children.filter { ($0.label ?? "") == prop.label }
if let sameProp = selfProps.first, childObject = sameProp.value as? AnyObject, label = prop.label {
dest.setValue(childObject, forKey: label)
}
}
}
}
5.documents-directory.txt 文件與文件夾操作。
let swiftArray = NSArray(contentsOfFile: filePath) as? [String]
if let swiftArray = swiftArray {
// now we can use Swift-native array methods
find(swiftArray, "findable string")
// cast back to NSArray to write
(swiftArray as NSArray).writeToFile(filePath, atomically: true)
}
6.gesture-recognizers.txt 手勢處理。
override func viewDidLoad() {
let gestureRecognizer = UITapGestureRecognizer(target: self, action: "handleTap:")
self.view.addGestureRecognizer(gestureRecognizer)
}
func handleTap(gestureRecognizer: UIGestureRecognizer) {
let alertController = UIAlertController(title: nil, message: "You tapped at (gestureRecognizer.locationInView(self.view))", preferredStyle: .Alert)
alertController.addAction(UIAlertAction(title: "Dismiss", style: .Cancel, handler: { _ in }))
self.presentViewController(alertController, animated: true, completion: nil)
}
7.guard-statements.txt guard聲明。區別OC.
func tappedSubmitButton() {
guard let name = nameField.text where isValid(name) else {
show("name failed validation")
return
}
submit(name)
}
8.ibaction-iboutlet.txt outlet 與ibaction
class MyViewController: UIViewController {
@IBOutlet weak var likeButton: UIButton?
@IBOutlet weak var instruction: UILabel?
@IBAction func likedThis(sender: UIButton) {
...
}
}
9.json-serialization.txt JSON序列化
let data: NSData = ...some data loaded...
let jsonError: NSError?
let decodedJson = NSJSONSerialization.JSONObjectWithData(data, options: nil, error: &jsonError!) as Dictionary<String, AnyObject>
if !jsonError {
print(decodedJson["title"])
}
10.kill-your-viewdidload.txt what fuck of this???????? ..small peace of OC such like a = ({b});
class ViewController: UIViewController {
let topView: UIView = {
let view = UIView()
view.frame = CGRect(x: 0, y: 0, width: 100, height: 200)
view.backgroundColor = UIColor.redColor()
return view
}()
}
11.method-signatures.txt 方法聲明。
func repeatThis(name: String, andDoItThisManyTimes times: Int) {
for i in 0..<times {
print(name)
}
}
repeatThis("swift", andDoItThisManyTimes: 3)
12.remote-notifications.txt 遠程通知。
UIApplication.sharedApplication().registerForRemoteNotifications()
func application(application: UIApplication, didRegisterForRemoteNotificationsWithDeviceToken deviceToken: NSData!) {
print("Got token data! (deviceToken)")
}
func application(application: UIApplication, didFailToRegisterForRemoteNotificationsWithError error: NSError!) {
print("Couldn't register: (error)")
}
13.singletons 單例。
class SomeManager {
static let sharedInstance = SomeManager()
func doAThing() {
// thing
}
}
SomeManager.sharedInstance.doAThing()
14.sorting-arrays.txt 排序。
var numbers = [0, 2, 3, 5, 10, 2]
numbers.sort {
return $0 < $1
}
15.string-formatting.txt 字符串格式化。
let timeString = String(format: "The current time is %02d:%02d", 10, 4)
16.table-state.txt 枚舉。
enum TableState {
case Loading
case Failed
case Items([String])
}
17.type-inference.txt 類型參考。
let myCompany: Dictionary<String, AnyObject> = [
"employees": [
"employee 1": ["attribute": "value"],
"employee 2": ["attribute": "value"],
"employee 3": ["attribute": "value"],
"employee 4": ["attribute": "value"],
"employee 5": ["attribute": "value"]
]
]
