Add blurred background capability

CHANGELOG.md

@@ -3,7 +3,9 @@ x.y.z Release Notes (yyyy-MM-dd)
 
 ### Added
 
-* A `contentView` property to enable adding custom view content to the button.
+* An `isTranslucent` property (and a `blurStyle` property) that replaces the background of buttons from a solid color to a blurred background.
+* A `contentView` property to enable adding custom view content to buttons.
+* `sizeToFit` and `sizeThatFits:` methods to allow automatic sizing of buttons around their content.
 
 ### Fixed
 

TORoundedButton.podspec

@@ -6,7 +6,7 @@ Pod::Spec.new do |s|
   s.homepage = 'https://github.com/TimOliver/TORoundedButton'
   s.author   = 'Tim Oliver'
   s.source   = { :git => 'https://github.com/TimOliver/TORoundedButton.git', :tag => s.version }
-  s.platform = :ios, '10.0'
+  s.platform = :ios, '12.0'
   s.source_files = 'TORoundedButton/**/*.{h,m}'
   s.requires_arc = true
 end

TORoundedButton/TORoundedButton.h

@@ -39,6 +39,12 @@ IB_DESIGNABLE @interface TORoundedButton : UIControl
 /// (Default value is 15 points inset from each edge).
 @property (nonatomic, assign) UIEdgeInsets contentInset;
 
+/// Replaces the solid color background with a blur view. (Default is NO)
+@property (nonatomic, assign) BOOL isTranslucent;
+
+/// When `isTranslucent` is `YES`, the amount of blur the background view has.
+@property (nonatomic, assign) UIBlurEffectStyle blurStyle;
+
 /// The text that is displayed in center of the button (Default is nil).
 @property (nonatomic, copy, nullable) IBInspectable NSString *text;
 

TORoundedButton/TORoundedButton.m

@@ -103,6 +103,10 @@ - (void)_roundedButtonCommonInit TOROUNDEDBUTTON_OBJC_DIRECT {
     _tappedButtonScale = (_tappedButtonScale > FLT_EPSILON) ?: 0.97f;
     _tappedTintColorBrightnessOffset = !TO_ROUNDED_BUTTON_FLOAT_IS_ZERO(_tappedTintColorBrightnessOffset) ?: -0.15f;
     _contentInset = (UIEdgeInsets){15.0, 15.0, 15.0, 15.0};
+    _blurStyle = UIBlurEffectStyleDark;
+#ifdef __IPHONE_13_0
+    if (@available(iOS 13.0, *)) { _blurStyle = UIBlurEffectStyleSystemThinMaterialDark; }
+#endif
 
     // Set the tapped tint color if we've set to dynamically calculate it
     [self _updateTappedTintColorForTintColor];
@@ -116,13 +120,7 @@ - (void)_roundedButtonCommonInit TOROUNDEDBUTTON_OBJC_DIRECT {
     [self addSubview:_containerView];
 
     // Create the image view which will show the button background
-    _backgroundView = [[UIView alloc] initWithFrame:self.bounds];
-    _backgroundView.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
-    _backgroundView.backgroundColor = self.tintColor;
-    _backgroundView.layer.cornerRadius = _cornerRadius;
-#ifdef __IPHONE_13_0
-    if (@available(iOS 13.0, *)) { _backgroundView.layer.cornerCurve = kCACornerCurveContinuous; }
-#endif
+    _backgroundView = [self _makeBackgroundViewWithBlur:_isTranslucent];
     [_containerView addSubview:_backgroundView];
 
     // The foreground content view
@@ -154,6 +152,25 @@ - (void)_makeTitleLabelIfNeeded TOROUNDEDBUTTON_OBJC_DIRECT {
     [_contentView addSubview:_titleLabel];
 }
 
+- (UIView *)_makeBackgroundViewWithBlur:(BOOL)withBlur TOROUNDEDBUTTON_OBJC_DIRECT {
+    UIView *backgroundView = nil;
+    if (withBlur) {
+        UIBlurEffect *const blurEffect = [UIBlurEffect effectWithStyle:_blurStyle];
+        backgroundView = [[UIVisualEffectView alloc] initWithEffect:blurEffect];
+        backgroundView.clipsToBounds = YES;
+    } else {
+        backgroundView = [[UIView alloc] initWithFrame:CGRectZero];
+        backgroundView.backgroundColor = self.tintColor;
+    }
+    backgroundView.frame = self.bounds;
+    backgroundView.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
+    backgroundView.layer.cornerRadius = _cornerRadius;
+#ifdef __IPHONE_13_0
+    if (@available(iOS 13.0, *)) { backgroundView.layer.cornerCurve = kCACornerCurveContinuous; }
+#endif
+    return backgroundView;
+}
+
 #pragma mark - View Layout -
 
 - (void)layoutSubviews {
@@ -236,7 +253,7 @@ - (void)_updateTappedTintColorForTintColor TOROUNDEDBUTTON_OBJC_DIRECT {
 
 - (UIColor *)_labelBackgroundColor TOROUNDEDBUTTON_OBJC_DIRECT {
     // Always return clear if tapped
-    if (_isTapped) { return [UIColor clearColor]; }
+    if (_isTapped || _isTranslucent) { return [UIColor clearColor]; }
 
     // Return clear if the tint color isn't opaque
     BOOL isClear = CGColorGetAlpha(self.tintColor.CGColor) < (1.0f - FLT_EPSILON);
@@ -290,7 +307,7 @@ - (void)_didDragInside {
 #pragma mark - Animation -
 
 - (void)_setBackgroundColorTappedAnimated:(BOOL)animated TOROUNDEDBUTTON_OBJC_DIRECT {
-    if (!self.tappedTintColor) { return; }
+    if (!self.tappedTintColor || _isTranslucent) { return; }
 
     // Toggle the background color of the title label
     void (^updateTitleOpacity)(void) = ^{
@@ -467,6 +484,33 @@ - (void)setCornerRadius:(CGFloat)cornerRadius {
     [self setNeedsLayout];
 }
 
+- (void)setIsTranslucent:(BOOL)isTranslucent {
+    if (_isTranslucent == isTranslucent) {
+        return;
+    }
+
+    _isTranslucent = isTranslucent;
+    [_backgroundView removeFromSuperview];
+    _backgroundView = [self _makeBackgroundViewWithBlur:_isTranslucent];
+    [_containerView insertSubview:_backgroundView atIndex:0];
+    _titleLabel.backgroundColor = [self _labelBackgroundColor];
+    [self setNeedsLayout];
+}
+
+- (void)setBlurStyle:(UIBlurEffectStyle)blurStyle {
+    if (_blurStyle == blurStyle) {
+        return;
+    }
+
+    _blurStyle = blurStyle;
+    if (!_isTranslucent || ![_backgroundView isKindOfClass:[UIVisualEffectView class]]) {
+        return;
+    }
+
+    UIVisualEffectView *const blurView = (UIVisualEffectView *)_backgroundView;
+    [blurView setEffect:[UIBlurEffect effectWithStyle:_blurStyle]];
+}
+
 - (void)setEnabled:(BOOL)enabled {
     [super setEnabled:enabled];
     _containerView.alpha = enabled ? 1 : 0.4;

TORoundedButtonExample.xcodeproj/project.pbxproj

@@ -51,6 +51,7 @@
 		220FC30822BC67E700B5C284 /* README.md */ = {isa = PBXFileReference; lastKnownFileType = net.daringfireball.markdown; path = README.md; sourceTree = "<group>"; };
 		220FC30922BC67FE00B5C284 /* CHANGELOG.md */ = {isa = PBXFileReference; lastKnownFileType = net.daringfireball.markdown; path = CHANGELOG.md; sourceTree = "<group>"; };
 		221ACFC52AC939D700DE86FD /* TORoundedButtonExample.entitlements */ = {isa = PBXFileReference; lastKnownFileType = text.plist.entitlements; path = TORoundedButtonExample.entitlements; sourceTree = "<group>"; };
+		221ACFCF2AD0DAFC00DE86FD /* TORoundedButton.podspec */ = {isa = PBXFileReference; lastKnownFileType = text; path = TORoundedButton.podspec; sourceTree = "<group>"; };
 		22700639226CA24D003492CB /* TORoundedButtonExample.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = TORoundedButtonExample.app; sourceTree = BUILT_PRODUCTS_DIR; };
 		2270063C226CA24D003492CB /* AppDelegate.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = AppDelegate.h; sourceTree = "<group>"; };
 		2270063D226CA24D003492CB /* AppDelegate.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = AppDelegate.m; sourceTree = "<group>"; };
@@ -112,6 +113,7 @@
 				2270063A226CA24D003492CB /* Products */,
 				220FC30922BC67FE00B5C284 /* CHANGELOG.md */,
 				220FC30822BC67E700B5C284 /* README.md */,
+				221ACFCF2AD0DAFC00DE86FD /* TORoundedButton.podspec */,
 				2274935225849DE500FE4C74 /* Frameworks */,
 			);
 			sourceTree = "<group>";

TORoundedButtonExample/ViewController.m

@@ -25,6 +25,9 @@ - (void)viewDidLoad {
         [weakSelf playFadeAnimationOnView:weakSelf.tappedLabel];
     };
 
+    // Uncomment to make the background view a blur view
+    // self.button.isTranslucent = YES;
+
     // Uncomment this line for an attributed string example
     // self.button.attributedText = [[self class] makeExampleAttributedString];