工作笔记

发表于

1、根据 text 和字体大小返回 size

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CGSize topTilteSize = [KGCommonTools sizeForString:topTilte.text font:topTilte.font];

2、ceil(xx)函数

函数名: ceil

用 法: double ceil(double x);

功 能: 返回大于或者等于指定表达式的最小整数

头文件:math.h

3、UIButton 的一个分类，扩大 button 本身的点击响应范围

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#import <UIKit/UIKit.h>
#import <objc/runtime.h>

@interface UIButton (EnlargeEdge)

- (void)setEnlargeEdge:(CGFloat)size;

- (void)setEnlargeEdgeWithTop:(CGFloat)top bottom:(CGFloat)bottom left:(CGFloat)left right:(CGFloat)right;

@end
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#import "UIButton+EnlargeEdge.h"

@implementation UIButton (EnlargeEdge)

static char topNameKey;
static char leftNameKey;
static char rightNameKey;
static char bottomNameKey;

- (void)setEnlargeEdge:(CGFloat)size
{
    objc_setAssociatedObject(self, &topNameKey, [NSNumber numberWithFloat:size], OBJC_ASSOCIATION_RETAIN_NONATOMIC);
    objc_setAssociatedObject(self, &leftNameKey, [NSNumber numberWithFloat:size], OBJC_ASSOCIATION_RETAIN_NONATOMIC);
    objc_setAssociatedObject(self, &rightNameKey, [NSNumber numberWithFloat:size], OBJC_ASSOCIATION_RETAIN_NONATOMIC);
    objc_setAssociatedObject(self, &bottomNameKey, [NSNumber numberWithFloat:size], OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}

- (void)setEnlargeEdgeWithTop:(CGFloat)top bottom:(CGFloat)bottom left:(CGFloat)left right:(CGFloat)right
{
    objc_setAssociatedObject(self, &topNameKey, [NSNumber numberWithFloat:top], OBJC_ASSOCIATION_RETAIN_NONATOMIC);
    objc_setAssociatedObject(self, &leftNameKey, [NSNumber numberWithFloat:left], OBJC_ASSOCIATION_RETAIN_NONATOMIC);
    objc_setAssociatedObject(self, &rightNameKey, [NSNumber numberWithFloat:right], OBJC_ASSOCIATION_RETAIN_NONATOMIC);
    objc_setAssociatedObject(self, &bottomNameKey, [NSNumber numberWithFloat:bottom], OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}

- (CGRect)enlargedRect
{
    NSNumber *topEdge = objc_getAssociatedObject(self, &topNameKey);
    NSNumber *leftEdge = objc_getAssociatedObject(self, &leftNameKey);
    NSNumber *rightEdge = objc_getAssociatedObject(self, &rightNameKey);
    NSNumber *bottomEdge = objc_getAssociatedObject(self, &bottomNameKey);
    
    if (topEdge && bottomEdge && leftEdge && rightEdge) {
        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;
}

//Should Not Override hitTest: directly!

//- (UIView *)hitTest:(CGPoint)point withEvent:(UIEvent *)event
//{
//    CGRect rect = [self enlargedRect];
//    if (CGRectEqualToRect(rect, self.bounds))
//    {
//        return [super hitTest:point withEvent:event];
//    }
//    return CGRectContainsPoint(rect, point) ? self : nil;
//}


@end

使用：

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[cell.downloadBtn setEnlargeEdgeWithTop:15 bottom:15 left:7.5 right:15]; // 扩大点击范围

参考链接：

iOS事件响应链中Hit-Test View的应用

4、解决阴影和圆角不能同时共存的问题

参考：

如何让阴影和圆角同时实现

5.