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一般我们如果要给按钮增加一个点击效果 ,最常见的方式是通过设置背景图片
即调用
- (void)setBackgroundImage:(UIImage *)image forState:(UIControlState)state
然后按钮就会根据state的状态去设置按钮的背景
现在提供一个新的方式 ,可以解决不用设置图片 ,也不需要引用第三方的开源代码就可以完成
已编写成分类(Category),具体代码
// // UIButton+PKAdditions.h// // Created by pk on 14/12/16. // Copyright (c) 2014年 suma. All rights reserved. // #import <UIKit/UIKit.h> @interface UIButton (PKAdditions) - (void)addClickEffectWithColor:(UIColor *)color; @end
// // UIButton+PKAdditions.m // // Created by pk on 14/12/16. // Copyright (c) 2014年 suma. All rights reserved. // #import "UIButton+PKAdditions.h" @implementation UIButton (PKAdditions) - (void)addClickEffectWithColor:(UIColor *)color { if (color) { CGSize imageSize = self.frame.size; UIGraphicsBeginImageContextWithOptions(imageSize, 0, [UIScreen mainScreen].scale); [color set]; UIRectFill(CGRectMake(0, 0, imageSize.width, imageSize.height)); UIImage *pressedColorImg = UIGraphicsGetImageFromCurrentImageContext(); UIGraphicsEndImageContext(); self.layer.masksToBounds = YES; self.opaque = NO; [self setBackgroundImage:pressedColorImg forState:UIControlStateNormal]; } } @end
使用方式
UIButton * tenderBtn = [[UIButton alloc] initWithFrame:CGRectMake(150, 180, 150, 50)];
[tenderBtn setTitle:@"效 果" forState:UIControlStateNormal];
[tenderBtn addClickEffectWithColor:[UIColor grayColor]]; tenderBtn.layer.cornerRadius = 10.0f; [self addSubview:tenderBtn];
实际效果:
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原文地址:http://www.cnblogs.com/tianlin106/p/4178785.html