[iOS] UITextField 隱藏 keyboard

假設現在有兩個 UITextField 打完字按視窗要把keyboard縮下去

要先在class 加上 UITextFieldDelegate

後面設定請參考

	//class need add : UITextFieldDelegate
	override func viewDidLoad() {
	super.viewDidLoad()
	//delegate
	discountTextField.delegate = self
	sizeTextField.delegate = self
	//add gesture to view
	self.view.addGestureRecognizer(UITapGestureRecognizer(target: self, action: #selector(InvCalcViewController.dismissKeyboard)))
	}
	// dismiss keyboard function
	func dismissKeyboard(){
	sizeTextField.resignFirstResponder()
	discountTextField.resignFirstResponder()
	}

view raw hideKeyboard.swift hosted with ❤ by GitHub

[iOS] Alamofire 安裝

如果沒有 CocoPods 請先安裝

STEP1.在Xcode開一個project  然後 關掉Xcode

STEP2. 利用 terminal cd 到剛剛的project 資料夾

STPE3. terminal 下指令" pod init"

STEP4. project 資料夾內會多出Podfile ，編輯Podfile

STEP5. Podfile裡面填入

	source 'https://github.com/CocoaPods/Specs.git'
	platform :ios, '9.0'
	use_frameworks!
	target 'ProjectName' do
	pod 'Alamofire', '~> 3.4'
	end

view raw gistfile1.txt hosted with ❤ by GitHub

ProjectName 就是你Xcode project的名稱


STEP6. terminal 下指令" pod install"

STEP7. 最後在project 內記得要 import Alamofire


如果出現

App Transport Security has blocked a cleartext HTTP (http://) resource load since it is insecure. Temporary exceptions can be configured via your app's Info.plist file.

在info.plist 按右鍵 -> open as source code 加入下面

NSAppTransportSecurity

   

        NSAllowsArbitraryLoads

       

    

[iOS] checkbok 使用 google material icon 製作

恩....iOS竟然沒check box 的元件可以用

只能用google material icon 代替了

STEP.01

https://design.google.com/icons/#ic_radio_button_checked

去google material icon下載 png 檔案

[iOS] checkbok 使用 google material icon 製作

恩....iOS竟然沒check box 的元件可以用

只能用google material icon 代替了

STEP.01

https://design.google.com/icons/#ic_radio_button_checked

去google material icon下載 png 檔案

[iOS] checkbok 使用 google material icon 製作

恩....iOS竟然沒check box 的元件可以用

只能用google material icon 代替了

STEP.01

https://design.google.com/icons/#ic_radio_button_checked

去google material icon下載 png 檔案

[iOS] Internal Rate of Return(IRR) calculator for swift version

恩....需要計算IRR就參考這裡改成swift版本的

有需要請自行取用

GitHub : https://github.com/openopen114/IRR_calculator_swift_version"

	// IRR swift version
	// openopen114@gmail.com
	// reference http://www.codeproject.com/Tips/461049/Internal-Rate-of-Return-IRR-Calculation
	// 2016/06/23
	import UIKit
	func computeIRR(cashFlows:[Int],numOfFlows:Int) -> Double{
	//const
	let LOW_RATE = 0.01 // 1%
	let HIGH_RATE = 0.5 //50%
	let MAX_ITERATION = 1000 //iteration
	let PRECISION_REQ = 0.00000001 //percision
	//variable
	var old: Double = 0.00;
	var new: Double = 0.00;
	var oldguessRate: Double = LOW_RATE;
	var newguessRate: Double = LOW_RATE;
	var guessRate: Double = LOW_RATE;
	var lowGuessRate: Double = LOW_RATE;
	var highGuessRate: Double = HIGH_RATE;
	var npv: Double = 0.0;
	var denom: Double = 0.0;
	for i in 0 ..< MAX_ITERATION {
	npv = 0.00;
	for j in 0..<numOfFlows{
	denom = pow(1 + guessRate,Double(j));
	npv = npv + (Double(cashFlows[j])/denom);
	}
	if((npv > 0) && (npv < PRECISION_REQ)){break;}
	if(old == 0){
	old = npv;
	}else{
	old = new;
	}
	new = npv;
	if(i > 0)
	{
	if(old < new)
	{
	if(old < 0 && new < 0){
	highGuessRate = newguessRate;
	}else{
	lowGuessRate = newguessRate;
	}
	}
	else
	{
	if(old > 0 && new > 0){
	lowGuessRate = newguessRate;
	}else{
	highGuessRate = newguessRate;
	}
	}
	}
	oldguessRate = guessRate;
	guessRate = (lowGuessRate + highGuessRate) / 2;
	newguessRate = guessRate;
	}
	return guessRate
	}
	//Test
	/*
	var cf = [Int]()
	var numOfFlows:Int;
	cf.append(-224988)
	cf.append(34662)
	cf.append(34312)
	cf.append(33962)
	cf.append(33612)
	cf.append(33262)
	cf.append(32912)
	cf.append(32562)
	cf.append(32212)
	cf.append(31862)
	cf.append(31512)
	cf.append(31162)
	cf.append(30812)
	cf.append(30462)
	cf.append(30112)
	cf.append(29762)
	cf.append(29412)
	cf.append(29062)
	cf.append(28712)
	cf.append(28362)
	numOfFlows = 20;
	var irr = computeIRR(cf, numOfFlows:numOfFlows);
	print("\nFinal IRR: %.3f", irr);
	*/

view raw IRR.swift hosted with ❤ by GitHub

[iOS] Xcode thread 1 signal sigabrt 錯誤

通常是連結錯誤

但有時又不知道是哪裡或是哪個IBOutlet

想這次是 table view 的 Identifier 忘記改（因為是直接複製過來的）

可是錯誤只有說  thread 1 signal sigabrt  .....

[解決] Xampp php 連接 MS SQL server sqlsrv問題

剛在試 php 連MS SQL server 2014

google 一下就有很多篇圖文並茂的教學

有成功的話在 phpinfo.php 頁面上會出現 sqlsrv

沒出現就是失敗了

[iOS] ActivityIndicator 用法

恩....通常在載入東西等待時可以用ActivityIndicator

用法很簡單只要設定開始跟停止，還有停止後隱藏

例如載入網頁時

	//class saleWebViewController: UIViewController, UIWebViewDelegate
	@IBOutlet weak var spinner: UIActivityIndicatorView!
	//網頁開始Load
	func webViewDidStartLoad(webView: UIWebView) {
	spinner.startAnimating() //開始轉
	}
	//網頁Load好了
	func webViewDidFinishLoad(webView: UIWebView) {
	spinner.stopAnimating() //停
	}

view raw spinner.swift hosted with ❤ by GitHub

要停止後隱藏，要在這設定勾選

[iOS] NSURL中文網址Crash解決辦法

要是網址中有中文或其他符號有可能造成在開網頁時使得App crash 

像是UIWebView開新網頁時 

所以網址字串後面要用.stringByAddingPercentEncodingWithAllowedCharacters(.URLHostAllowedCharacterSet())!處理

就像這樣

	//GG crach
	let webViewURL001: String = "http://text.com/?q1=我是中文&q2=我是符號%%%"
	//Good to go with string.stringByAddingPercentEncodingWithAllowedCharacters(.URLHostAllowedCharacterSet())!
	let webViewURL002: String = "http://text.com/?q1=我是中文&q2=我是符號%%%".stringByAddingPercentEncodingWithAllowedCharacters(NSCharacterSet.URLQueryAllowedCharacterSet())!
	let url = NSURL(string: webViewURL002)

view raw stringURL.swift hosted with ❤ by GitHub

[iOS] Alamofire 載入 json 檔前先清 cache

在讀取外部json檔案時，iOS都會讀到cache裡面的
所以就算json有更新，iOS還是抓到cache 舊的json檔

所以要先清cache

NSURLCache.sharedURLCache().removeAllCachedResponses()// remove/clear cache

view raw NSURLCache.swift hosted with ❤ by GitHub

然後在載入json檔案

	Alamofire.request(.GET,urlString).responseJSON { (response) in
	if let JSON = response.result.value{
	let jsonObj = JSON as! NSArray
	for p in jsonObj {
	// append to Array
	}
	}
	}

view raw AlamofireRequestJson.swift hosted with ❤ by GitHub