扩大按钮 btn 响应区域
方法一:类别
p.p1 { margin: 0.0px 0.0px 0.0px 0.0px; font: 18.0px Menlo; color: #c91b13 }
p.p2 { margin: 0.0px 0.0px 0.0px 0.0px; font: 18.0px Menlo }
p.p3 { margin: 0.0px 0.0px 0.0px 0.0px; font: 18.0px Menlo; min-height: 21.0px }
p.p4 { margin: 0.0px 0.0px 0.0px 0.0px; font: 18.0px Menlo; color: #c32275 }
span.s1 { color: #822e0e }
span.s2 { }
span.s3 { color: #c32275 }
span.s4 { color: #703daa }
#import <UIKit/UIKit.h>
#import <objc/runtime.h>
@interface UIButton (EnlargeEdge)
- (void)XSsetEnlargeEdge:(CGFloat) size;
- (void)XSsetEnlargeEdgeWithTop:(CGFloat) top right:(CGFloat) right bottom:(CGFloat) bottom left:(CGFloat) left;
@end
p.p1 { margin: 0.0px 0.0px 0.0px 0.0px; font: 18.0px Menlo; color: #c91b13 }
p.p2 { margin: 0.0px 0.0px 0.0px 0.0px; font: 18.0px Menlo; min-height: 21.0px }
p.p3 { margin: 0.0px 0.0px 0.0px 0.0px; font: 18.0px Menlo }
p.p4 { margin: 0.0px 0.0px 0.0px 0.0px; font: 18.0px Menlo; color: #3d1d81 }
p.p5 { margin: 0.0px 0.0px 0.0px 0.0px; font: 18.0px Menlo; color: #c32275 }
span.s1 { color: #822e0e }
span.s2 { }
span.s3 { color: #c32275 }
span.s4 { color: #703daa }
span.s5 { color: #000000 }
span.s6 { color: #539aa4 }
span.s7 { color: #6122ae }
span.s8 { color: #3d1d81 }
span.s9 { color: #294c50 }
#import "UIButton+EnlargeEdge.h"
@implementation UIButton (EnlargeEdge)
static char topNameKey;
static char rightNameKey;
static char bottomNameKey;
static char leftNameKey;
- (void)XSsetEnlargeEdge:(CGFloat) size
{
objc_setAssociatedObject(self, &topNameKey, [NSNumber numberWithFloat:size], OBJC_ASSOCIATION_COPY_NONATOMIC);
objc_setAssociatedObject(self, &rightNameKey, [NSNumber numberWithFloat:size], OBJC_ASSOCIATION_COPY_NONATOMIC);
objc_setAssociatedObject(self, &bottomNameKey, [NSNumber numberWithFloat:size], OBJC_ASSOCIATION_COPY_NONATOMIC);
objc_setAssociatedObject(self, &leftNameKey, [NSNumber numberWithFloat:size], OBJC_ASSOCIATION_COPY_NONATOMIC);
}
- (void)XSsetEnlargeEdgeWithTop:(CGFloat) top right:(CGFloat) right bottom:(CGFloat) bottom left:(CGFloat) left
{
objc_setAssociatedObject(self, &topNameKey, [NSNumber numberWithFloat:top], OBJC_ASSOCIATION_COPY_NONATOMIC);
objc_setAssociatedObject(self, &rightNameKey, [NSNumber numberWithFloat:right], OBJC_ASSOCIATION_COPY_NONATOMIC);
objc_setAssociatedObject(self, &bottomNameKey, [NSNumber numberWithFloat:bottom], OBJC_ASSOCIATION_COPY_NONATOMIC);
objc_setAssociatedObject(self, &leftNameKey, [NSNumber numberWithFloat:left], OBJC_ASSOCIATION_COPY_NONATOMIC);
}
- (CGRect)enlargedRect
{
NSNumber* topEdge = objc_getAssociatedObject(self, &topNameKey);
NSNumber* rightEdge = objc_getAssociatedObject(self, &rightNameKey);
NSNumber* bottomEdge = objc_getAssociatedObject(self, &bottomNameKey);
NSNumber* leftEdge = objc_getAssociatedObject(self, &leftNameKey);
if (topEdge && rightEdge && bottomEdge && leftEdge)
{
return CGRectMake(self.bounds.origin.x - leftEdge.floatValue,
self.bounds.origin.y - topEdge.floatValue,
self.bounds.size.width + leftEdge.floatValue + rightEdge.floatValue,
self.bounds.size.height + topEdge.floatValue + bottomEdge.floatValue);
}
else
{
return self.bounds;
}
}
- (BOOL)pointInside:(CGPoint)point withEvent:(UIEvent *)event
{
CGRect rect = [self enlargedRect];
if (CGRectEqualToRect(rect, self.bounds))
{
return [super pointInside:point withEvent:event];
}
return CGRectContainsPoint(rect, point) ? YES : NO;
}
@end
方法二:
第二种：直接创建一个UIButton类，然后复写pointInside方法
使用时继承于此类即可
.h文件
- #import <UIKit/UIKit.h>
- @interface BiggerClickAreaButton : UIButton
- @end
.m文件
- #import "BiggerClickAreaButton.h"
- @implementation BiggerClickAreaButton
- - (BOOL)pointInside:(CGPoint)point withEvent:(UIEvent*)event
- {
- CGRect bounds = self.bounds;
- //若原热区小于44x44，则放大热区，否则保持原大小不变
- CGFloat widthDelta = MAX(44.0 - bounds.size.width, 0);
- CGFloat heightDelta = MAX(44.0 - bounds.size.height, 0);
- bounds = CGRectInset(bounds, -0.5 * widthDelta, -0.5 * heightDelta);
- return CGRectContainsPoint(bounds, point);
- }
- @end
使用时直接继承创建即可
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