1.iOS按鈕防重點(diǎn)擊
創(chuàng)建UIButton的分類着绷，需要注意的是恭理，load方法里殉挽，互換系統(tǒng)方法時(shí)的處理植影，直接執(zhí)行method_exchangeImplementations裳擎，點(diǎn)擊tabbar按鈕會(huì)crash，提示找不到對(duì)應(yīng)方法思币；
.h文件
@interface UIButton (FixMultiClick)
/**
點(diǎn)擊間隔：默認(rèn)0.5s鹿响，對(duì)所有按鈕生效：設(shè)置0s無(wú)效羡微，如果不需要放多點(diǎn)處理，需要設(shè)置cl_noFix=YES;
針對(duì)打電話惶我，可設(shè)置1s左右
*/
@property (nonatomic, assign) NSTimeInterval cl_acceptEventInterval;
/**
不做防多點(diǎn)的處理：如有些按鈕【點(diǎn)擊完】需要【立馬執(zhí)行】sendActionsForControlEvents:方法妈倔，此時(shí)如果操作了防多點(diǎn)，則改方法會(huì)被阻斷绸贡；
解決方法是：設(shè)置cl_noFix=YES盯蝴；
并不是所有執(zhí)行sendActionsForControlEvents:方法的，都需要設(shè)置cl_noFix=YES恃轩；非立馬執(zhí)行的结洼，就不存在此問(wèn)題
默認(rèn)為NO
*/
@property (nonatomic, assign) BOOL cl_noFix;
@end
.m文件
import "UIButton+FixMultiClick.h"
import <objc/runtime.h>
define defaultInterval 0.5
static const char *UIButton_acceptEventInterval = "UIButton_acceptEventInterval";
static const char *UIButton_ignoreEvent = "UIButton_ignoreEvent";
static const char *UIButton_noFix = "UIButton_noFix";
@interface UIButton ()
/**
太短時(shí)間間隔內(nèi)(默認(rèn)是0.5s)，忽略新的點(diǎn)擊事件：默認(rèn)為No
*/
@property (nonatomic, assign) BOOL cl_ignoreEvent;
@end
@implementation UIButton (FixMultiClick)
/**
顧名思義叉跛，load方法在這個(gè)文件被程序裝載時(shí)調(diào)用松忍。只要是在Compile Sources中出現(xiàn)的文件總是會(huì)被裝載，這與這個(gè)類是否被用到無(wú)關(guān)筷厘，因此load方法總是在main函數(shù)之前調(diào)用鸣峭。
*/
- (void)load
{
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
//點(diǎn)擊事件
SEL selA = @selector(sendAction:to:forEvent:);
SEL selB = @selector(fixMultiClickSendAction:to:forEvent:);
Method methodA = class_getInstanceMethod(self, selA);
Method methodB = class_getInstanceMethod(self, selB);
//將methodB的實(shí)現(xiàn)添加到系統(tǒng)方法中，也就是說(shuō)將methodA的方法指針添加成方法methodB
BOOL isAdd = class_addMethod(self, selA, method_getImplementation(methodB), method_getTypeEncoding(methodB));
if (isAdd) {
//添加成功酥艳，說(shuō)明本類中不存在methodB摊溶，所以此時(shí)必須將methodB的實(shí)現(xiàn)指針換成methodA的，否則methodB將沒(méi)有實(shí)現(xiàn)
class_replaceMethod(self, selB, method_getImplementation(methodA), method_getTypeEncoding(methodA));
} else {
//添加失敗充石，說(shuō)明本類中methodB的實(shí)現(xiàn)莫换，只需將methodA和methodB的IMP互換即可
method_exchangeImplementations(methodA, methodB);
}
});
}
- (void)fixMultiClickSendAction:(SEL)action to:(id)target forEvent:(UIEvent *)event
{
if (self.cl_noFix) {
//不做防多點(diǎn)的處理，如有些按鈕需要執(zhí)行sendActionsForControlEvents:方法
[self fixMultiClickSendAction:action to:target forEvent:event];
return;
}
if (self.cl_ignoreEvent) {
return;
}
//將cl_ignoreEvent的設(shè)置提前骤铃，防止在這期間來(lái)了新的點(diǎn)擊事件拉岁，從而沒(méi)有達(dá)到阻斷的目的
self.cl_ignoreEvent = YES;
if ([NSStringFromClass(self.class) isEqualToString:@"UIButton"]) {
//cl_acceptEventInterval為0時(shí)，設(shè)置為默認(rèn)0.5s
if (!self.cl_acceptEventInterval) {
self.cl_acceptEventInterval = defaultInterval;
}
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(self.cl_acceptEventInterval * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
//指定間隔后惰爬，放開阻斷
self.cl_ignoreEvent = NO;
});
} else {
//非UIButton（如UITabButton）喊暖，不做此處理
self.cl_ignoreEvent = NO;
}
[self fixMultiClickSendAction:action to:target forEvent:event];
}
pragma mark - getter/setter
(NSTimeInterval)cl_acceptEventInterval
{
return [objc_getAssociatedObject(self, UIButton_acceptEventInterval) doubleValue];
}(void)setCl_acceptEventInterval:(NSTimeInterval)cl_acceptEventInterval
{
objc_setAssociatedObject(self, UIButton_acceptEventInterval, @(cl_acceptEventInterval), OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}(BOOL)cl_ignoreEvent
{
return [objc_getAssociatedObject(self, UIButton_ignoreEvent) boolValue];
}(void)setCl_ignoreEvent:(BOOL)cl_ignoreEvent
{
objc_setAssociatedObject(self, UIButton_ignoreEvent, @(cl_ignoreEvent), OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}(BOOL)cl_noFix
{
return [objc_getAssociatedObject(self, UIButton_noFix) boolValue];
}(void)setCl_noFix:(BOOL)cl_noFix
{
objc_setAssociatedObject(self, UIButton_noFix, @(cl_noFix), OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}
@end
2.對(duì)cell添加防重處理
首先，貼方法
- (BOOL)fastSelectedCell
{
if (self.ignoreEvent) {
return YES;
}
self.ignoreEvent = YES;
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(self.acceptEventInterval * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
self.ignoreEvent = NO;
});
return NO;
}
在- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath方法中撕瞧，判斷是否快速點(diǎn)擊陵叽，再執(zhí)行操作。
