实现的方式是给UIButton、UIGestureRecongnizer、UITapGestureRecongnizer、NSTimer、UISwitch 添加分类
在分类的.m实现文件中使用rumtime，objc_setAssociatedObject添加一个block属性，接收到事件后就会回调这个block
下载地址: https://github.com/boundlessocean/UIKit-Block-
1.UIButton
创建UIButton (BLBlock)的分类
初始化完成之后就可以直接调用bl_handleWithBlock:(BLButtonActionBlock)actionBlock controlEvent:(UIControlEvents)controlEvent处理事件就在block回调中啦
这是.h文件
#import
typedef void (^BLButtonActionBlock)(id sender);
@interface UIButton (BLBlock)
/**
* 处理事件
*
* @param actionBlock 事件回调
* @param controlEvent 事件类型
*/
- (void)bl_handleWithBlock:(BLButtonActionBlock)actionBlock controlEvent:(UIControlEvents)controlEvent;
/**
* 扩大 UIButton 的点击范围
* 上下左右需要延伸的范围
*
* @param top <#top description#>
* @param right <#right description#>
* @param bottom <#bottom description#>
* @param left <#left description#>
*/
- (void)bl_setEnlargeEdgeWithTop:(CGFloat)top right:(CGFloat)right bottom:(CGFloat)bottom left:(CGFloat)left;
@end
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这是.m
#import "UIButton+BLBlock.h"
#import
static char topNameKey;
static char rightNameKey;
static char bottomNameKey;
static char leftNameKey;
static char kActionKey;
@implementation UIButton (BLBlock)
- (void)bl_handleWithBlock:(MFButtonActionBlock)actionBlock controlEvent:(UIControlEvents)controlEvent{
objc_setAssociatedObject(self, &kActionKey, actionBlock, OBJC_ASSOCIATION_COPY_NONATOMIC);
[self addTarget:self action:@selector(b_callActionBlock:) forControlEvents:controlEvent];
}
- (void)b_callActionBlock:(id)sender{
MFButtonActionBlock block = (MFButtonActionBlock)objc_getAssociatedObject(self, &kActionKey);
if (block) {
block(self);
}
}
- (void)bl_setEnlargeEdgeWithTop:(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)b_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;
}
}
- (UIView *)hitTest:(CGPoint)point withEvent:(UIEvent *)event
{
CGRect rect = [self b_enlargedRect];
if (CGRectEqualToRect(rect, self.bounds)) {
return [super hitTest:point withEvent:event];
}
return CGRectContainsPoint(rect, point) ? self : nil;
}
@end
2.UIGestureRecognizer
同样调- (void)bl_handleRecognizerBlock:(BLGestureRecognizerBlock)actionBlock;在block中处理事件
这是.h
#import
typedef void(^BLGestureRecognizerBlock)(id sender);
@interface UIGestureRecognizer (BLBlock)
- (void)bl_handleRecognizerBlock:(BLGestureRecognizerBlock)actionBlock;
@end
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.m文件
#import "UIGestureRecognizer+BLBlock.h"
#import
static char kGestureRecognizerKey;
@implementation UIGestureRecognizer (BLBlock)
- (void)bl_handleRecognizerBlock:(GestureRecognizerBlock)actionBlock{
objc_setAssociatedObject(self, &kGestureRecognizerKey, actionBlock, OBJC_ASSOCIATION_COPY_NONATOMIC);
[self addTarget:self action:@selector(b_callGestureRecognizer:)];
}
- (void)b_callGestureRecognizer:(id)sender{
GestureRecognizerBlock block = (GestureRecognizerBlock)objc_getAssociatedObject(self, &kGestureRecognizerKey);
if (block) {
block(self);
}
}
@end
3.UITapGestureRecongnizer
.h文件
#import
typedef void (^BLTapGestureRecognizerBlock)(id sender);
@interface UITapGestureRecognizer (BLBlock)
- (void)bl_handleWithBlock:(BLTapGestureRecognizerBlock)actionBlock;
@end
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.m实现文件
#import "UITapGestureRecognizer+BLBlock.h"
#import
static char kTapGestureRecognizerKey;
@implementation UITapGestureRecognizer (BLBlock)
- (void)bl_handleWithBlock:(BLTapGestureRecognizerBlock)actionBlock{
objc_setAssociatedObject(self, &kTapGestureRecognizerKey, actionBlock, OBJC_ASSOCIATION_COPY_NONATOMIC);
[self addTarget:self action:@selector(b_callTapGestureRecognizerBlock:)];
}
- (void)b_callTapGestureRecognizerBlock:(id)sender{
BLTapGestureRecognizerBlock blcok = (BLTapGestureRecognizerBlock)objc_getAssociatedObject(self, &kTapGestureRecognizerKey);
if (blcok) {
blcok(self);
}
}
@end
4 . NSTimer
#import
@interface NSTimer (BLBlock)
/**
* 初始化timer
*
* @param seconds 执行间隔
* @param block 执行方法回调
* @param repeats 是否重复
*
* @return timer
*/
+ (NSTimer *)bl_scheduledTimerWithTimeInterval:(NSTimeInterval)seconds
block:(void (^)(NSTimer *timer))block
repeats:(BOOL)repeats;
+ (NSTimer *)bl_timerWithTimeInterval:(NSTimeInterval)seconds
block:(void (^)(NSTimer *timer))block
repeats:(BOOL)repeats;
@end
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.m实现文件
#import "NSTimer+BLBlock.h"
@implementation NSTimer (BLBlock)
+ (NSTimer *)bl_scheduledTimerWithTimeInterval:(NSTimeInterval)seconds block:(void (^)(NSTimer *timer))block repeats:(BOOL)repeats {
return [NSTimer scheduledTimerWithTimeInterval:seconds target:self selector:@selector(execHelperBlock:) userInfo:[block copy] repeats:repeats];
}
+ (NSTimer *)bl_timerWithTimeInterval:(NSTimeInterval)seconds block:(void (^)(NSTimer *timer))block repeats:(BOOL)repeats {
return [NSTimer timerWithTimeInterval:seconds target:self selector:@selector(execHelperBlock:) userInfo:[block copy] repeats:repeats];
}
@end
5 . UISwitch
#import
typedef void (^BLSwitchActionBlock)(id sender);
@interface UISwitch (BLBlock)
- (void)bl_handleWithBlock:(BLSwitchActionBlock)actionBlock controlEvent:(UIControlEvents)controlEvent;
@end
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.m实现文件
#import "UISwitch+BLBlock.h"
#import
static char kActionKey;
@implementation UISwitch (BLBlock)
- (void)bl_handleWithBlock:(BLSwitchActionBlock)actionBlock controlEvent:(UIControlEvents)controlEvent{
objc_setAssociatedObject(self, &kActionKey, actionBlock, OBJC_ASSOCIATION_COPY_NONATOMIC);
[self addTarget:self action:@selector(b_callActionBlock:) forControlEvents:controlEvent];
}
- (void)b_callActionBlock:(id)sender{
BLSwitchActionBlock block = (BLSwitchActionBlock)objc_getAssociatedObject(self, &kActionKey);
if (block) {
block(self);
}
}
@end