MRoundedButton is a subclass of UIControl and the appearance is like the iOS 7 Phone app button or the button on the Control Center and also perform fade in/out animation for touch event.

Four button styles are suplied:

MRoundedButtonDefault           //  central text
MRoundedButtonSubtitle          //  text with subtitle 
MRoundedButtonCentralImage      //  central image
MRoundedButtonImageWithSubtitle //  image with subtitle

To set a transparent border:

MRoundedButton *button = [[MRoundedButton alloc] initWithFrame:#<BUTTON_FRAME>
                                                   buttonStyle:#<BUTTON_STYLE>];
button.borderWidth = 2;
button.borderColor = [UIColor clearColor];

The borderWidth and cornerRadius are limited to MIN(BUTTON_WIDTH / 2, BUTTON_HEIGHT / 2). So if you want to make a Round MRoundedButton, just set the cornerRadius to FLT_MAX

platform :ios, '6.0'
pod "MRoundedButton", "~> 1.0"

MRoundedButtonAppearanceManager is the appearance manager for the MRoundedButton, each appearance information can be stored in an NSDictionary object with a unique identifier:

NSDictionary *appearanceProxy = @{kMRoundedButtonCornerRadius : @40,
                                  kMRoundedButtonBorderWidth  : @2,
                                  kMRoundedButtonBorderColor  : [UIColor clearColor],
                                  kMRoundedButtonContentColor : [UIColor blackColor],
                                  kMRoundedButtonContentAnimationColor : [UIColor whiteColor],
                                  kMRoundedButtonForegroundColor : [UIColor whiteColor],
                                  kMRoundedButtonForegroundAnimationColor : [UIColor clearColor]};
[MRoundedButtonAppearanceManager registerAppearanceProxy:appearanceProxy1 forIdentifier:#<UNIQUE_IDENTIFIER>];

MRHollowView can be used to place the MRoundedButton on an image view or something.

In the drawRect: method, each subview of HRHollowView are EO cliped to its bounds. Then the superview content can be displayed via the hollowed shapes.

iOS 6.0+

1. Fix typo (may need your help)
2. Border issue

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