Fixed Text Alignment

mkoehnke · Oct 5, 2015 · fdb82eb · fdb82eb
1 parent 469b55f
commit fdb82eb
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Showing 3 changed files with 25 additions and 4 deletions.
diff --git a/AnimatedBlurLabel/AnimatedBlurLabel.swift b/AnimatedBlurLabel/AnimatedBlurLabel.swift
@@ -132,6 +132,20 @@ class AnimatedBlurLabel : UILabel {
         }
     }
 
+    private func hasAlignment(alignment: NSTextAlignment) -> Bool {
+        var hasAlignment = false
+        if let text = attributedTextToRender {
+            text.enumerateAttribute(NSParagraphStyleAttributeName, inRange: NSMakeRange(0, text.length), options: [], usingBlock: { value, _ , stop in
+                let paragraphStyle = value as? NSParagraphStyle
+                hasAlignment = paragraphStyle?.alignment == alignment
+                stop.memory = true
+            })
+        } else if let _ = textToRender {
+            hasAlignment = textAlignment == alignment
+        }
+        return hasAlignment
+    }
+
     private func deferBlur(blurred: Bool, animated: Bool, completion: ((finished : Bool) -> Void)?) {
         print("Defer blurring ...")
         blurredParameter = blurred
@@ -308,10 +322,18 @@ class AnimatedBlurLabel : UILabel {
         CATransaction.setDisableActions(true)
         blurLayer1.frame = bounds
         blurLayer2.frame = bounds
+
+        if let renderedTextImage = renderedTextImage where hasAlignment(.Center) == false {
+            var newX = (bounds.size.width - renderedTextImage.size.width) / 2
+            newX = hasAlignment(.Right) ? newX : (newX * -1)
+            blurLayer1.frame = CGRectOffset(blurLayer1.frame, newX, 0)
+            blurLayer2.frame = CGRectOffset(blurLayer2.frame, newX, 0)
+        }
+
         CATransaction.setDisableActions(false)
         CATransaction.commit()
     }
-
+    
     private func applyBlurEffect(image: UIImage, blurLevel: Double) -> UIImage {
         let resultImage : CIImage!
         if blurLevel > 0 {

diff --git a/Example/AnimatedBlurLabelDemo/Base.lproj/Main.storyboard b/Example/AnimatedBlurLabelDemo/Base.lproj/Main.storyboard
@@ -30,7 +30,6 @@
                             <constraint firstItem="Nrj-rR-itJ" firstAttribute="leading" secondItem="8bC-Xf-vdC" secondAttribute="leading" id="7SO-xA-ZWY"/>
                             <constraint firstItem="Nrj-rR-itJ" firstAttribute="centerY" secondItem="8bC-Xf-vdC" secondAttribute="centerY" id="Beg-my-Ynp"/>
                             <constraint firstAttribute="trailing" secondItem="Nrj-rR-itJ" secondAttribute="trailing" id="Dtq-O3-seq"/>
-                            <constraint firstItem="Nrj-rR-itJ" firstAttribute="centerX" secondItem="8bC-Xf-vdC" secondAttribute="centerX" id="qFu-Em-cME"/>
                         </constraints>
                     </view>
                     <connections>

diff --git a/Example/AnimatedBlurLabelDemo/ViewController.swift b/Example/AnimatedBlurLabelDemo/ViewController.swift
@@ -15,7 +15,7 @@ class ViewController: UIViewController {
     override func viewDidLoad() {
         super.viewDidLoad()
         // Do any additional setup after loading the view, typically from a nib.
-
+        blurLabel.animationDuration = 1.0
     }
 
     override func viewDidLayoutSubviews() {
@@ -27,7 +27,7 @@ class ViewController: UIViewController {
         let attributes = [NSParagraphStyleAttributeName : paragraph, NSForegroundColorAttributeName : UIColor.whiteColor()]
 
         let string = NSMutableAttributedString(string: "Title\n\nSubtitle", attributes: attributes)
-        string.addAttribute(NSFontAttributeName, value: UIFont.boldSystemFontOfSize(32.0), range: NSMakeRange(0, 5))
+        string.addAttribute(NSFontAttributeName, value: UIFont.boldSystemFontOfSize(48.0), range: NSMakeRange(0, 5))
         string.addAttribute(NSFontAttributeName, value: UIFont.systemFontOfSize(14.0), range: NSMakeRange(7, 7))
         blurLabel.attributedText = string
     }