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Add functionality to stop and reenable the automatic scrolling of the text. #49

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Add functionality to stop and reenable the automatic scrolling of the text. #49

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afd43d4
Add functions to stop and reenable auto-scroll (enabled by default)
jpsachse Jun 8, 2015
9a49e4e
Add buttons for stopping / reenabling the animation to the example pr…
jpsachse Jun 8, 2015
dcaedbc
Update screenshot
jpsachse Jun 8, 2015
61a1071
Update Podspec file
jpsachse Jun 8, 2015
1e05f86
Revert "Update Podspec file"
jpsachse Jun 8, 2015
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16 changes: 16 additions & 0 deletions AutoScrollLabelDemo/AutoScrollLabelDemo/ASLViewController.m
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Original file line number Diff line number Diff line change
Expand Up @@ -40,4 +40,20 @@ - (void)viewDidLoad {
[self.navigationBarScrollLabel observeApplicationNotifications];
}

- (IBAction)stopScrollingAfterCyle:(id)sender {
[self.autoScrollLabel stopScrollingAfterCurrentCycle];
}

- (IBAction)stopScrollingImmediately:(id)sender {
[self.autoScrollLabel stopScrollingImmediatelyAnimated:NO];
}

- (IBAction)stopScrollingImmediatelyAnimated:(id)sender {
[self.autoScrollLabel stopScrollingImmediatelyAnimated:YES];
}

- (IBAction)restartScrolling:(id)sender {
[self.autoScrollLabel reenableAutoScroll];
}

@end
70 changes: 64 additions & 6 deletions AutoScrollLabelDemo/AutoScrollLabelDemo/en.lproj/Main.storyboard
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Original file line number Diff line number Diff line change
@@ -1,8 +1,9 @@
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="6254" systemVersion="14B25" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" initialViewController="2aA-IC-rYH">
<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="7706" systemVersion="14E26a" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" initialViewController="2aA-IC-rYH">
<dependencies>
<deployment identifier="iOS"/>
<plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="6247"/>
<plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="7703"/>
<capability name="Constraints to layout margins" minToolsVersion="6.0"/>
</dependencies>
<scenes>
<!--View Controller-->
Expand All @@ -17,24 +18,81 @@
<rect key="frame" x="0.0" y="20" width="320" height="568"/>
<autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
<subviews>
<label opaque="NO" clipsSubviews="YES" userInteractionEnabled="NO" contentMode="left" fixedFrame="YES" text="No scrolling here" textAlignment="center" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" minimumFontSize="10" translatesAutoresizingMaskIntoConstraints="NO" id="uUq-eg-6Qz">
<rect key="frame" x="20" y="196" width="280" height="21"/>
<label opaque="NO" clipsSubviews="YES" userInteractionEnabled="NO" contentMode="left" text="No scrolling here" textAlignment="center" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" minimumFontSize="10" translatesAutoresizingMaskIntoConstraints="NO" id="uUq-eg-6Qz">
<rect key="frame" x="20" y="196" width="280" height="20.5"/>
<fontDescription key="fontDescription" type="system" pointSize="17"/>
<color key="textColor" cocoaTouchSystemColor="darkTextColor"/>
<nil key="highlightedColor"/>
</label>
<view contentMode="scaleToFill" fixedFrame="YES" translatesAutoresizingMaskIntoConstraints="NO" id="bYm-Ms-nJx" customClass="CBAutoScrollLabel">
<view contentMode="scaleToFill" translatesAutoresizingMaskIntoConstraints="NO" id="bYm-Ms-nJx" customClass="CBAutoScrollLabel">
<rect key="frame" x="20" y="105" width="280" height="42"/>
<color key="backgroundColor" white="1" alpha="1" colorSpace="custom" customColorSpace="calibratedWhite"/>
<constraints>
<constraint firstAttribute="height" constant="42" id="X6E-mY-ub9"/>
</constraints>
</view>
<button opaque="NO" contentMode="scaleToFill" contentHorizontalAlignment="center" contentVerticalAlignment="center" buttonType="roundedRect" lineBreakMode="middleTruncation" translatesAutoresizingMaskIntoConstraints="NO" id="Sc9-NW-LbX">
<rect key="frame" x="75" y="225" width="170" height="30"/>
<state key="normal" title="Stop scrolling after cycle">
<color key="titleShadowColor" white="0.5" alpha="1" colorSpace="calibratedWhite"/>
</state>
<connections>
<action selector="stopScrollingAfterCyle:" destination="Kmn-b1-dPT" eventType="touchUpInside" id="eDx-XU-zd7"/>
</connections>
</button>
<button opaque="NO" contentMode="scaleToFill" contentHorizontalAlignment="center" contentVerticalAlignment="center" buttonType="roundedRect" lineBreakMode="middleTruncation" translatesAutoresizingMaskIntoConstraints="NO" id="sKS-N3-NlF">
<rect key="frame" x="69" y="263" width="181" height="30"/>
<state key="normal" title="Stop scrolling immediately">
<color key="titleShadowColor" white="0.5" alpha="1" colorSpace="calibratedWhite"/>
</state>
<connections>
<action selector="stopScrollingImmediately:" destination="Kmn-b1-dPT" eventType="touchUpInside" id="kkY-uv-0GO"/>
</connections>
</button>
<button opaque="NO" contentMode="scaleToFill" contentHorizontalAlignment="center" contentVerticalAlignment="center" buttonType="roundedRect" lineBreakMode="middleTruncation" translatesAutoresizingMaskIntoConstraints="NO" id="UVj-kv-cp6">
<rect key="frame" x="31" y="301" width="257" height="30"/>
<state key="normal" title="Stop scrolling immediately (animated)">
<color key="titleShadowColor" white="0.5" alpha="1" colorSpace="calibratedWhite"/>
</state>
<connections>
<action selector="stopScrollingImmediatelyAnimated:" destination="Kmn-b1-dPT" eventType="touchUpInside" id="edL-3N-t3n"/>
</connections>
</button>
<button opaque="NO" contentMode="scaleToFill" contentHorizontalAlignment="center" contentVerticalAlignment="center" buttonType="roundedRect" lineBreakMode="middleTruncation" translatesAutoresizingMaskIntoConstraints="NO" id="z4v-wW-U0e">
<rect key="frame" x="90" y="339" width="137" height="30"/>
<state key="normal" title="(Re)enable Scrolling">
<color key="titleShadowColor" white="0.5" alpha="1" colorSpace="calibratedWhite"/>
</state>
<connections>
<action selector="restartScrolling:" destination="Kmn-b1-dPT" eventType="touchUpInside" id="nLo-zY-dkm"/>
</connections>
</button>
</subviews>
<color key="backgroundColor" white="0.75" alpha="1" colorSpace="custom" customColorSpace="calibratedWhite"/>
<constraints>
<constraint firstItem="bYm-Ms-nJx" firstAttribute="leading" secondItem="eDd-wf-uuK" secondAttribute="leadingMargin" constant="4" id="6RO-Yy-Wur"/>
<constraint firstItem="bYm-Ms-nJx" firstAttribute="width" secondItem="eDd-wf-uuK" secondAttribute="width" priority="750" id="7rd-Jw-Z5y"/>
<constraint firstItem="uUq-eg-6Qz" firstAttribute="top" secondItem="bYm-Ms-nJx" secondAttribute="bottom" constant="49" id="B9L-OY-aSu"/>
<constraint firstAttribute="centerX" secondItem="Sc9-NW-LbX" secondAttribute="centerX" id="BR6-7P-3Un"/>
<constraint firstItem="Sc9-NW-LbX" firstAttribute="top" secondItem="uUq-eg-6Qz" secondAttribute="bottom" constant="8.5" id="Cv3-p3-V6a"/>
<constraint firstAttribute="trailingMargin" secondItem="uUq-eg-6Qz" secondAttribute="trailing" constant="4" id="D0O-wN-cSG"/>
<constraint firstAttribute="centerX" secondItem="z4v-wW-U0e" secondAttribute="centerX" constant="1" id="Ikq-Ql-hjb"/>
<constraint firstAttribute="centerX" secondItem="sKS-N3-NlF" secondAttribute="centerX" id="JVb-pX-i0O"/>
<constraint firstItem="UVj-kv-cp6" firstAttribute="top" secondItem="sKS-N3-NlF" secondAttribute="bottom" constant="8" id="Neg-Yy-OBE"/>
<constraint firstItem="z4v-wW-U0e" firstAttribute="top" secondItem="UVj-kv-cp6" secondAttribute="bottom" constant="8" id="WYY-fm-vcu"/>
<constraint firstItem="uUq-eg-6Qz" firstAttribute="leading" secondItem="eDd-wf-uuK" secondAttribute="leadingMargin" constant="4" id="Wn8-BU-tKQ"/>
<constraint firstAttribute="centerX" secondItem="UVj-kv-cp6" secondAttribute="centerX" id="lOt-Dn-gTb"/>
<constraint firstAttribute="trailingMargin" secondItem="bYm-Ms-nJx" secondAttribute="trailing" constant="4" id="lxa-F2-cOQ"/>
<constraint firstItem="bYm-Ms-nJx" firstAttribute="top" secondItem="GR8-4d-l6Y" secondAttribute="bottom" constant="41" id="tKl-2x-dIN"/>
<constraint firstItem="sKS-N3-NlF" firstAttribute="top" secondItem="Sc9-NW-LbX" secondAttribute="bottom" constant="8" id="uFT-5v-3kd"/>
<constraint firstAttribute="width" secondItem="uUq-eg-6Qz" secondAttribute="width" priority="750" id="xhJ-eE-oyx"/>
</constraints>
</view>
<navigationItem key="navigationItem" id="qkc-jm-XpV">
<nil key="title"/>
<barButtonItem key="leftBarButtonItem" systemItem="edit" id="BZs-Na-law"/>
<view key="titleView" contentMode="scaleToFill" id="cVi-6H-3sM" customClass="CBAutoScrollLabel">
<rect key="frame" x="75" y="6" width="170" height="33"/>
<rect key="frame" x="75" y="5.5" width="170" height="33"/>
<autoresizingMask key="autoresizingMask" widthSizable="YES" flexibleMaxY="YES"/>
<color key="backgroundColor" white="0.0" alpha="0.0" colorSpace="calibratedWhite"/>
</view>
Expand Down
Binary file modified AutoScrollLabelDemo/screenshot.png
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17 changes: 17 additions & 0 deletions CBAutoScrollLabel/CBAutoScrollLabel.h
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Expand Up @@ -36,6 +36,7 @@ typedef NS_ENUM(NSInteger, CBAutoScrollDirection) {
* Returns YES, if it is actively scrolling, NO if it has paused or if text is within bounds (disables scrolling).
*/
@property (nonatomic, readonly) BOOL scrolling;
@property (nonatomic, assign, readonly) BOOL shouldScroll;
@property (nonatomic) CGFloat fadeLength;

// UILabel properties
Expand Down Expand Up @@ -65,6 +66,22 @@ typedef NS_ENUM(NSInteger, CBAutoScrollDirection) {
*/
- (void)scrollLabelIfNeeded;

/**
* Stops auto-scroll after the current cycle has been finished.
*/
- (void)stopScrollingAfterCurrentCycle;

/**
* Stops auto-scroll immediately and resets the scroll position to the start.
* @param animated Defines whether the scrolling to the beginning should be animated or not.
*/
- (void)stopScrollingImmediatelyAnimated:(BOOL)animated;

/**
* (Re)enables auto-scroll. If auto-scroll is already enabled, calling this method has no effect.
*/
- (void)reenableAutoScroll;

/**
* Observes UIApplication state notifications to auto-restart scrolling and watch for
* orientation changes to refresh the labels.
Expand Down
21 changes: 20 additions & 1 deletion CBAutoScrollLabel/CBAutoScrollLabel.m
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Expand Up @@ -35,6 +35,7 @@ @interface CBAutoScrollLabel ()
@property (nonatomic, strong) NSArray *labels;
@property (nonatomic, strong, readonly) UILabel *mainLabel;
@property (nonatomic, strong) UIScrollView *scrollView;
@property (nonatomic, assign, readwrite) BOOL shouldScroll;

@end

Expand Down Expand Up @@ -84,6 +85,7 @@ - (void)commonInit {
self.backgroundColor = [UIColor clearColor];
self.clipsToBounds = YES;
self.fadeLength = kDefaultFadeLength;
self.shouldScroll = YES;
}

- (void)dealloc {
Expand Down Expand Up @@ -253,7 +255,7 @@ - (void)enableShadow {
}

- (void)scrollLabelIfNeeded {
if (!self.text.length)
if (!self.text.length || !self.shouldScroll)
return;

CGFloat labelWidth = CGRectGetWidth(self.mainLabel.bounds);
Expand Down Expand Up @@ -289,6 +291,23 @@ - (void)scrollLabelIfNeeded {
}];
}

- (void)stopScrollingAfterCurrentCycle {
self.shouldScroll = NO;
}

- (void)stopScrollingImmediatelyAnimated:(BOOL)animated {
self.shouldScroll = NO;
[self.scrollView.layer removeAllAnimations];
[self.scrollView setContentOffset:CGPointZero animated:animated];
}

- (void)reenableAutoScroll {
self.shouldScroll = YES;
if (!self.scrolling) {
[self scrollLabelIfNeeded];
}
}

- (void)refreshLabels {
__block float offset = 0;

Expand Down