我需要绘制一个平行四边形的自定义按钮。做这个的最好方式是什么?图像方式(即设置对照的背景图像)不合适。
答案 0 :(得分:4)
如果您不需要为按钮设置任何图像, Brain89 提供的解决方案就很好。我有背景和内容图像,我需要制作平行四边形按钮而不更改图像。我使用下一个代码:
// Pass 0..1 value to either skewX if you want to compress along the X axis
// or skewY if you want to compress along the Y axis
- (void)parallelogramButtonWithButton:(UIButton *)button withSkewX:(CGFloat)skewX withSkewY:(CGFloat)skewY {
CGAffineTransform affineTransform = CGAffineTransformConcat(CGAffineTransformIdentity, CGAffineTransformMake(1, skewY, skewX, 1, 0, 0));
button.layer.affineTransform = affineTransform;
}
答案 1 :(得分:3)
希望这很容易。经过一些谷歌搜索后,我想出了解决方案
<强> UIParallelogramButton.h 强>
#import <UIKit/UIKit.h>
#import "QuartzCore/QuartzCore.h"
@interface UIParallelogramButton : UIButton
{
CGFloat offset;
}
@property CGFloat offset;
@end
<强> UIParallelogramButton.m 强>
#import "UIParallelogramButton.h"
@implementation UIParallelogramButton
@synthesize offset;
- (id)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self)
{
offset = 0.0F;
}
return self;
}
- (void)drawRect:(CGRect)rect
{
UIBezierPath* maskPath = [UIBezierPath bezierPath];
[maskPath moveToPoint:CGPointMake(rect.origin.x + offset, rect.origin.y)];
[maskPath addLineToPoint:CGPointMake(rect.size.width + rect.origin.x, rect.origin.y)];
[maskPath addLineToPoint:CGPointMake(rect.origin.x + rect.size.width - offset, rect.origin.y + rect.size.height)];
[maskPath addLineToPoint:CGPointMake(rect.origin.x, rect.origin.y + rect.size.height)];
[maskPath closePath];
CAShapeLayer* maskLayer = [[CAShapeLayer alloc] init];
maskLayer.frame = self.bounds;
maskLayer.path = maskPath.CGPath;
self.layer.mask = maskLayer;
}
@end