用于演示_Objective-C_下载.zip

/* Copyright (c) 2009 Ole Begemann Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ /* OBShapedButton.h Created by Ole Begemann October, 2009 */ #import <UIKit/UIKit.h> /* OBShapedButton is a UIButton subclass optimized for non-rectangular button shapes. Instances of OBShapedButton respond to touches only in areas where the image that is assigned to the button for UIControlStateNormal is non-transparent. Usage: - Add OBShapedButton.h, OBShapedButton.m, UIImage+ColorAtPixel.h, and UIImage+ColorAtPixel.m to your Xcode project. - Design your UI in Interface Builder with UIButtons as usual. Set the Button type to Custom and provide transparent PNG images for the different control states as needed. - In the Identity Inspector in Interface Builder, set the Class of the button to OBShapedButton. That's it! Your button will now only respond to touches where the PNG image for the normal control state is non-transparent. */ // -[UIView hitTest:withEvent: ignores views that an alpha level less than 0.1. // So we will do the same and treat pixels with alpha < 0.1 as transparent. #define kAlphaVisibleThreshold (0.1f); @interface OBShapedButton : UIButton { // Our class interface is empty. OBShapedButton only overwrites one method of UIView. // It has no attributes of its own. } @end