避免短时间多次点击按钮之iOS笔记摘录

目录

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1. 使用

1. 创建分类文件

UIButton+FQTimeButton.h

#import <UIKit/UIKit.h>

#define defaultInterval 2.0// 默认间隔时间

@interface UIButton (FQTimeButton)
// 设置点击时间间隔
@property (nonatomic, assign) NSTimeInterval timeInterVal;
@end

UIButton+FQTimeButton.m

#import "UIButton+FQTimeButton.h"

@interface UIButton()
// 用来判断 是否去执行方法
@property (nonatomic, assign) BOOL isExcuteEvent;
@end


@implementation UIButton (FQTimeButton)

// main方法之前会调用d所有类的load方法
+ (void)load{
    // 仅执行一次，避免多次替换出错
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        
        // 交换自定义方法和系统方法
        SEL oldSel = @selector(sendAction:to:forEvent:);
        SEL newSel = @selector(newSendAction:to:forEvent:);
        Method oldMethod = class_getInstanceMethod(self, oldSel);
        Method newMethod = class_getInstanceMethod(self, newSel);
        BOOL isAdd = class_addMethod(self, oldSel, method_getImplementation(newMethod), method_getTypeEncoding(newMethod));
        if (isAdd) {
            class_replaceMethod(self, newSel, method_getImplementation(oldMethod), method_getTypeEncoding(oldMethod));
        }else{
            method_exchangeImplementations(oldMethod, newMethod);
        }
    });
}

// 触发按钮事件时会调用
- (void)newSendAction:(SEL)action to:(id)target forEvent:(UIEvent *)event{
    if ([NSStringFromClass(self.class) isEqualToString:@"UIButton"]) {
        if (self.isExcuteEvent == 0) {
            self.timeInterVal = self.timeInterVal = 0? defaultInterval:self.timeInterVal;
        }
        if (self.isExcuteEvent) return;
        if (self.timeInterVal > 0) {
            self.isExcuteEvent = true;
            [self performSelector:@selector(setIsExcuteEvent:) withObject:nil afterDelay:self.timeInterVal];
        }
    }
    [self newSendAction:action to:target forEvent:event];
}

// 动态关联属性
- (NSTimeInterval)timeInterVal{
    return [objc_getAssociatedObject(self, _cmd) doubleValue];
}
- (void)setTimeInterVal:(NSTimeInterval)timeInterVal{
    objc_setAssociatedObject(self, @selector(timeInterVal), @(timeInterVal), OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}
- (void)setIsExcuteEvent:(BOOL)isExcuteEvent{
    objc_setAssociatedObject(self, @selector(isExcuteEvent), @(isExcuteEvent), OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}
- (BOOL)isExcuteEvent{
    return [objc_getAssociatedObject(self, _cmd) boolValue];
}
@end

2. 使用

#import "UIButton+FQTimeButton.h"

-(UIButton *)saveButton{
    if(!_saveButton){
        _saveButton=[UIButton new];
        [_saveButton setTimeInterVal:3.5];    // 设置3.5秒内不可重复点击
        [_saveButton setTitle:@"保存" forState:UIControlStateNormal];
        [_saveButton setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
        [_saveButton.titleLabel setFont:kFontBold(14)];
        [_saveButton setBackgroundColor:[UIColor colorWithHex:0xFB5752]];
        [_saveButton.layer setMasksToBounds:true];
        [_saveButton.layer setCornerRadius:kEstimateWidth(50)/2.0];
        [_saveButton addTarget:self action:@selector(fq_handleSave:) forControlEvents:UIControlEventTouchUpInside];
    }
    return _saveButton;
}