Added minimumWidth property

CHANGELOG.md

@@ -6,6 +6,7 @@ x.y.z Release Notes (yyyy-MM-dd)
 
 ### Enchancements
 
+* Added `minimumWidth` property to help with guiding external layout. ([#21](https://github.com/TimOliver/TORoundedButton/pull/21))
 * Refactored button from Core Animation labs chat at WWDC 2019. ([#20](https://github.com/TimOliver/TORoundedButton/pull/20))
 * Increased corner radius default value to 12.0. ([#20](https://github.com/TimOliver/TORoundedButton/pull/20))
 * Added lower alpha value when button is set to disabled. ([#15](https://github.com/TimOliver/TORoundedButton/pull/15))

TORoundedButton/TORoundedButton.h

@@ -34,7 +34,7 @@ IB_DESIGNABLE @interface TORoundedButton : UIControl
 @property (nonatomic, copy) IBInspectable NSString *text;
 
 /** The attributed string used in the label of this button. See `UILabel.attributedText` documentation for full details (Default is nil) */
-@property (nonatomic, copy, nullable) NSAttributedString  *attributedText;
+@property (nonatomic, copy, nullable) NSAttributedString *attributedText;
 
 /** The radius of the corners of this button (Default is 12.0f) */
 @property (nonatomic, assign) IBInspectable CGFloat cornerRadius;
@@ -63,6 +63,9 @@ IB_DESIGNABLE @interface TORoundedButton : UIControl
 /** The duration of the tapping cross-fade animation (Default is 0.4f) */
 @property (nonatomic, assign) CGFloat tapAnimationDuration;
 
+/** Given the current size of the text label, the smallest horizontal width in which this button can scale. */
+@property (nonatomic, readonly) CGFloat minimumWidth;
+
 /** A callback handler triggered each time the button is tapped. */
 @property (nonatomic, copy) void (^tappedHandler)(void);
 

TORoundedButton/TORoundedButton.m

@@ -128,6 +128,7 @@ - (void)roundedButtonCommonInit
     self.titleLabel.adjustsFontForContentSizeCategory = YES;
     self.titleLabel.backgroundColor = self.tintColor;
     self.titleLabel.text = @"Button";
+    [self.titleLabel sizeToFit];
     [self.containerView addSubview:self.titleLabel];
 
     // Create action events for all possible interactions with this control
@@ -144,7 +145,6 @@ - (void)layoutSubviews
     [super layoutSubviews];
 
     // Configure the button text
-    [self.titleLabel sizeToFit];
     self.titleLabel.center = self.containerView.center;
     self.titleLabel.frame = CGRectIntegral(self.titleLabel.frame);
 }
@@ -322,6 +322,8 @@ - (void)setButtonScaledTappedAnimated:(BOOL)animated
 - (void)setAttributedText:(NSAttributedString *)attributedText
 {
     self.titleLabel.attributedText = attributedText;
+    [self.titleLabel sizeToFit];
+    [self setNeedsLayout];
 }
 
 - (NSAttributedString *)attributedText
@@ -332,6 +334,8 @@ - (NSAttributedString *)attributedText
 - (void)setText:(NSString *)text
 {
     self.titleLabel.text = text;
+    [self.titleLabel sizeToFit];
+    [self setNeedsLayout];
 }
 - (NSString *)text { return self.titleLabel.text; }
 
@@ -404,6 +408,11 @@ - (void)setEnabled:(BOOL)enabled
     self.containerView.alpha = enabled ? 1 : 0.4;
 }
 
+- (CGFloat)minimumWidth
+{
+    return self.titleLabel.frame.size.width;
+}
+
 #pragma mark - Graphics Handling -
 
 + (UIColor *)brightnessAdjustedColorWithColor:(UIColor *)color amount:(CGFloat)amount

TORoundedButtonExample.xcodeproj/project.pbxproj

@@ -55,6 +55,8 @@
 /* Begin PBXFileReference section */
 		220F9AAE22784FD4001862A7 /* TORoundedButton.framework */ = {isa = PBXFileReference; explicitFileType = wrapper.framework; includeInIndex = 0; path = TORoundedButton.framework; sourceTree = BUILT_PRODUCTS_DIR; };
 		220F9ABE2278AA0B001862A7 /* Info.plist */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.plist.xml; path = Info.plist; sourceTree = "<group>"; };
+		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>"; };
 		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>"; };
@@ -110,11 +112,13 @@
 		22700630226CA24D003492CB = {
 			isa = PBXGroup;
 			children = (
+				220FC30822BC67E700B5C284 /* README.md */,
 				22700660226CA322003492CB /* TORoundedButton */,
 				2270063B226CA24D003492CB /* TORoundedButtonExample */,
 				220F9ABD2278AA0B001862A7 /* TORoundedButtonFramework */,
 				22700654226CA24E003492CB /* TORoundedButtonExampleTests */,
 				2270063A226CA24D003492CB /* Products */,
+				220FC30922BC67FE00B5C284 /* CHANGELOG.md */,
 			);
 			sourceTree = "<group>";
 		};