GCD #1
func dispatch_async_main(block: () -> (), delay: Double = 0) {
if delay <= 0 {
dispatch_async(dispatch_get_main_queue(), block)
return
}
let d = dispatch_time(DISPATCH_TIME_NOW, Int64(delay * Double(NSEC_PER_SEC)))
dispatch_after(d, dispatch_get_main_queue()) {
block()
}
}
UICollectionViewCellを上揃え
import UIKit
class TopAlignedCollectionViewFlowLayout: UICollectionViewFlowLayout {
override func layoutAttributesForElementsInRect(rect: CGRect) -> [AnyObject]? {
var sameYElements:[UICollectionViewLayoutAttributes] = []
var baseline:CGFloat = -2.0
var height:CGFloat = 0.0
var basey:CGFloat = 0.0
let attributesToReturn:[UICollectionViewLayoutAttributes] = super.layoutAttributesForElementsInRect(rect) as [UICollectionViewLayoutAttributes]
for attributes in attributesToReturn {
if attributes.representedElementCategory == UICollectionElementCategory.Cell {
let centerY:CGFloat = CGRectGetMidY(attributes.frame)
if 1.0 < fabs(centerY - baseline) {
baseline = centerY
self.__alignTopWithElements(sameYElements, basey:basey)
sameYElements.removeAll()
height = 0.0
basey = 0.0
}
sameYElements.append(attributes)
if height < attributes.frame.size.height {
height = attributes.frame.size.height
basey = attributes.frame.origin.y
}
}
}
self.__alignTopWithElements(sameYElements, basey:basey)
return attributesToReturn
}
private func __alignTopWithElements(elements:[UICollectionViewLayoutAttributes], basey:CGFloat) {
if elements.count < 1 {
return
}
for attributes in elements {
var rect:CGRect = attributes.frame
rect.origin.y = basey
attributes.frame = rect
}
}
}
UITextFieldのクリアボタンの色を変える
extension UITextField {
func setTintColorToClearButton(){
let anyobj:AnyObject? = self.valueForKey("_clearButton")
if let anyobj:AnyObject = anyobj {
if anyobj.isMemberOfClass(UIButton) {
let button:UIButton = anyobj as UIButton
if let image:UIImage = button.imageForState(.Highlighted) {
let paintedImage:UIImage = image.imageWithRenderingMode(UIImageRenderingMode.AlwaysTemplate)
button.setImage(paintedImage, forState: .Normal)
button.setImage(paintedImage, forState: .Highlighted)
}
}
}
}
}
self.textField.tintColor = UIColor.whiteColor() self.textField.setTintColorToClearButton()
before
after
メモリアドレス取得
func getMemoryAddress(target:AnyObject) -> String {
return "\(unsafeAddressOf(target))"
}
let m1:String = self.getMemoryAddress(self.view1)
let m2:String = self.getMemoryAddress(self.view2)
println("mem:\(m1)")
println("mem:\(m2)")
println("m1 < m2 = \(m1 < m2)")
println("m2 < m1 = \(m2 < m1)")
結果
mem:0x00007fe718c4da20 mem:0x00007fe718c42f20 m1 < m2 = false m2 < m1 = true
クラス判別
let button:UIButton = UIButton()
let anyobj:AnyObject = button
if anyobj.isKindOfClass(UIView) {//対象クラスのサブクラスでもtrue
println("anyobj is kind of UIView")
}
if anyobj.isMemberOfClass(UIView) {
println("anyobj is member of UIView")
}
if anyobj.isMemberOfClass(UIButton) {
println("anyobj is member of UIButton")
}
if anyobj is UIView {//対象クラスのサブクラスでもtrue
println("anyobj is UIView")
}
if anyobj is UIButton {
println("anyobj is UIButton")
}
結果
anyobj is kind of UIView anyobj is member of UIButton anyobj is UIView anyobj is UIButton
UIImageを染める
let image:UIImage? = UIImage(named: "input_iconTest") let iv:UIImageView = UIImageView(image:image!) iv.paintColor = "ff0000" self.view.addSubview(iv)
extension UIImageView {
class func getUIColorByColorHex(colorHex:String) -> UIColor{
let colorScanner:NSScanner = NSScanner(string: colorHex)
var color:UInt32 = 0
colorScanner.scanHexInt(&color)
let r:CGFloat = CGFloat((color & 0xFF0000) >> 16) / CGFloat(255.0);
let g:CGFloat = CGFloat((color & 0x00FF00) >> 8) / CGFloat(255.0);
let b:CGFloat = CGFloat(color & 0x0000FF) / CGFloat(255.0);
return UIColor(red: r, green: g, blue: b, alpha: 1.0)
}
var paintColor:String{
get{
return ""
}
set{
if self.image != nil {
if newValue == "" {
self.image = self.image!.imageWithRenderingMode(UIImageRenderingMode.AlwaysOriginal)
}else{
self.tintColor = UIImageView.getUIColorByColorHex(newValue)
self.image = self.image!.imageWithRenderingMode(UIImageRenderingMode.AlwaysTemplate)
}
}
}
}
}
線を描く
let image:UIImage = self.getUIImageOfVerticalGrid(self.view.frame.size, start: 0.0, lineInterval: 10.0, lineThickness: 1.0, lineColorHex: "ff0000")
let iv:UIImageView = UIImageView(image:image)
iv.contentMode = UIViewContentMode.ScaleAspectFit
iv.frame = CGRectMake(0,0,self.view.frame.size.width,self.view.frame.size.height)
self.view.addSubview(iv)
func getUIImageOfVerticalGrid(size:CGSize, start:CGFloat=0.0, lineInterval:CGFloat=44.0, lineThickness:CGFloat=1.0, lineColorHex:String="D6D6D6") -> UIImage {
return self.getUIImageOfGrid(false, size: size, start: start, lineInterval: lineInterval, lineThickness: lineThickness, lineColorHex: lineColorHex)
}
func getUIImageOfGrid(horizontal:Bool, size:CGSize, start:CGFloat=0.0, lineInterval:CGFloat=44.0, lineThickness:CGFloat=1.0, lineColorHex:String="D6D6D6") -> UIImage {
let scale:CGFloat = UIScreen.mainScreen().scale
UIGraphicsBeginImageContextWithOptions(size, false, 0.0)
let context:CGContextRef = UIGraphicsGetCurrentContext()
CGContextSetLineWidth(context, 0.0)
let color:rgbTuple = self.getColorTupleByColorHex(lineColorHex)
CGContextSetRGBStrokeColor(context, color.r,color.g,color.b, 1.0)
CGContextSetRGBFillColor(context, color.r,color.g,color.b, 1.0)
let w:CGFloat = (horizontal) ? size.width : lineThickness / scale
let h:CGFloat = (horizontal) ? lineThickness / scale : size.height
var currentPosition:CGFloat = start
let maxPosition:CGFloat = (horizontal) ? size.height : size.width
while currentPosition < maxPosition {
let x:CGFloat = (horizontal) ? 0.0 : currentPosition
let y:CGFloat = (horizontal) ? currentPosition : 0.0
CGContextFillRect(context, CGRectMake( x, y, w, h))
currentPosition += lineInterval
}
let image:UIImage = UIGraphicsGetImageFromCurrentImageContext()
UIGraphicsEndImageContext()
return image
}
func getColorTupleByColorHex(colorHex:String, alpha:CGFloat=1.0) -> (r:CGFloat,g:CGFloat,b:CGFloat){
let colorScanner:NSScanner = NSScanner(string: colorHex)
var color:UInt32 = 0
colorScanner.scanHexInt(&color)
let r:CGFloat = CGFloat((color & 0xFF0000) >> 16) / CGFloat(255.0);
let g:CGFloat = CGFloat((color & 0x00FF00) >> 8) / CGFloat(255.0);
let b:CGFloat = CGFloat(color & 0x0000FF) / CGFloat(255.0);
return (r: r, g: g, b: b)
}
結果
ステータスバーの文字色を変える
1) Info.plist
「View controller-based status bar appearance」を「NO」へ
2)viewDidLoadに下記コード
UIApplication.sharedApplication().statusBarStyle = UIStatusBarStyle.LightContent
split
let t:String = "yyyy-MM-dd HH:mm:ss"
//let tmp:[String] = split(t, {$0 == "-" || $0 == " " || $0 == ":"}) //この方法でもよい
let tmp:[String] = split(t, {contains(["-"," ",":"],$0)})
println(tmp)
出力結果
[yyyy, MM, dd, HH, mm, ss]
rgbから16進数文字列取得
func getColorHexByColorTuple(color:(r:CGFloat,g:CGFloat,b:CGFloat)) -> String{
return NSString(format: "%02x%02x%02x", Int(color.r*255.0),Int(color.g*255.0),Int(color.b*255.0))
}