我分別用OC / Swift 寫兩個(gè)常用的防止UIButton重復(fù)點(diǎn)擊的方法 其實(shí)有三種方法 不過那一種太low 不想寫
OC 1. 第一種 cancelPreviousPerformRequestsWithTarget
- (void)viewDidLoad {
[super viewDidLoad];
UIButton * btn = [[UIButton alloc]initWithFrame:CGRectMake(100, 100, 100, 100)];
btn.backgroundColor = [UIColor redColor];
[btn addTarget:self action:@selector(TB_btnClick) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:btn];
}
-(void)TB_btnClick
{
[NSObject cancelPreviousPerformRequestsWithTarget:self selector:@selector(PrintHelloWorld) object:nil];
[self performSelector:@selector(PrintHelloWorld) withObject:nil afterDelay:.4];
}
-(void)PrintHelloWorld
{
NSLog(@"點(diǎn)擊了有延遲嗎");
}
// 間距都會(huì)超過0.4s
2017-06-02 18:51:24.351 button_repeat[12220:301281] 點(diǎn)擊了有延遲嗎
2017-06-02 18:51:24.895 button_repeat[12220:301281] 點(diǎn)擊了有延遲嗎
2017-06-02 18:51:25.798 button_repeat[12220:301281] 點(diǎn)擊了有延遲嗎
2017-06-02 18:51:28.222 button_repeat[12220:301281] 點(diǎn)擊了有延遲嗎
OC 2. 第二種 通過Runtime 寫一個(gè)UIButton 類別
// 這是類別的源碼
#import "UIButton+TBCustom.h"
#import <objc/runtime.h>
@interface UIButton()
@property (nonatomic, assign) NSTimeInterval custom_acceptEventInterval; // 可以用這個(gè)給重復(fù)點(diǎn)擊加間隔
@end
@implementation UIButton (TBCustom)
+ (void)load{
Method systemMethod = class_getInstanceMethod(self, @selector(sendAction:to:forEvent:));
SEL sysSEL = @selector(sendAction:to:forEvent:);
Method customMethod = class_getInstanceMethod(self, @selector(custom_sendAction:to:forEvent:));
SEL customSEL = @selector(custom_sendAction:to:forEvent:);
//添加方法 語法：BOOL class_addMethod(Class cls, SEL name, IMP imp, const char *types) 若添加成功則返回No
// cls：被添加方法的類 name：被添加方法方法名 imp：被添加方法的實(shí)現(xiàn)函數(shù) types：被添加方法的實(shí)現(xiàn)函數(shù)的返回值類型和參數(shù)類型的字符串
BOOL didAddMethod = class_addMethod(self, sysSEL, method_getImplementation(customMethod), method_getTypeEncoding(customMethod));
//如果系統(tǒng)中該方法已經(jīng)存在了，則替換系統(tǒng)的方法 語法：IMP class_replaceMethod(Class cls, SEL name, IMP imp,const char *types)
if (didAddMethod) {
class_replaceMethod(self, customSEL, method_getImplementation(systemMethod), method_getTypeEncoding(systemMethod));
}else{
method_exchangeImplementations(systemMethod, customMethod);
}
}
- (NSTimeInterval )custom_acceptEventInterval{
return [objc_getAssociatedObject(self, "UIControl_acceptEventInterval") doubleValue];
}
- (void)setCustom_acceptEventInterval:(NSTimeInterval)custom_acceptEventInterval{
objc_setAssociatedObject(self, "UIControl_acceptEventInterval", @(custom_acceptEventInterval), OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}
- (NSTimeInterval )custom_acceptEventTime{
return [objc_getAssociatedObject(self, "UIControl_acceptEventTime") doubleValue];
}
- (void)setCustom_acceptEventTime:(NSTimeInterval)custom_acceptEventTime{
objc_setAssociatedObject(self, "UIControl_acceptEventTime", @(custom_acceptEventTime), OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}
- (void)custom_sendAction:(SEL)action to:(id)target forEvent:(UIEvent *)event{
// 如果想要設(shè)置統(tǒng)一的間隔時(shí)間，可以在此處加上以下幾句
// 值得提醒一下：如果這里設(shè)置了統(tǒng)一的時(shí)間間隔，只會(huì)影響UIButton, 如果想統(tǒng)一設(shè)置，也想影響UISwitch，建議將UIButton分類，改成UIControl分類，實(shí)現(xiàn)方法是一樣的
if (self.custom_acceptEventInterval <= 0) {
// 如果沒有自定義時(shí)間間隔，則默認(rèn)為.4秒
self.custom_acceptEventInterval = .4;
}
// 是否小于設(shè)定的時(shí)間間隔
BOOL needSendAction = (NSDate.date.timeIntervalSince1970 - self.custom_acceptEventTime >= self.custom_acceptEventInterval);
// 更新上一次點(diǎn)擊時(shí)間戳
if (self.custom_acceptEventInterval > 0) {
self.custom_acceptEventTime = NSDate.date.timeIntervalSince1970;
}
// 兩次點(diǎn)擊的時(shí)間間隔小于設(shè)定的時(shí)間間隔時(shí)，才執(zhí)行響應(yīng)事件
if (needSendAction) {
[self custom_sendAction:action to:target forEvent:event];
}
}
這是測試代碼
- (void)viewDidLoad {
[super viewDidLoad];
UIButton * btn = [[UIButton alloc]initWithFrame:CGRectMake(100, 100, 100, 100)];
btn.backgroundColor = [UIColor redColor];
[btn addTarget:self action:@selector(TB_btnClick) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:btn];
}
-(void)TB_btnClick
{
NSLog(@"點(diǎn)擊了有延遲嗎");
}
// 測試數(shù)據(jù) 都不會(huì)少于0.4s
2017-06-02 18:56:48.334 button_repeat[12380:305861] 點(diǎn)擊了有延遲嗎
2017-06-02 18:56:50.110 button_repeat[12380:305861] 點(diǎn)擊了有延遲嗎
2017-06-02 18:56:50.702 button_repeat[12380:305861] 點(diǎn)擊了有延遲嗎
2017-06-02 18:56:51.270 button_repeat[12380:305861] 點(diǎn)擊了有延遲嗎
Swift
swift 第一種
import UIKit
class SWIFTViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
view.backgroundColor = UIColor.gray
// 第一種方式
StepOne()
}
fileprivate func StepOne(){
let btn = UIButton(frame: CGRect(x: 100, y: 100, width: 100, height: 100))
btn.backgroundColor = UIColor.green
btn.addTarget(self, action: #selector(btnClick(_:)), for: .touchUpInside)
view.addSubview(btn)
}
func btnClick(_ btn:UIButton){
NSObject.cancelPreviousPerformRequests(withTarget: self, selector: #selector(printHelloWorld), object: "abc")
self.perform(#selector(printHelloWorld), with: nil, afterDelay: 0.4)
}
func printHelloWorld(){
print("Swift 打印不出時(shí)間- 如果你知道 請(qǐng)大神 告知 --- 是否有延遲")
}
}
// 注釋
Swift 打印不出時(shí)間- 如果你知道 請(qǐng)大神 告知 --- 是否有延遲
Swift 打印不出時(shí)間- 如果你知道 請(qǐng)大神 告知 --- 是否有延遲
Swift 打印不出時(shí)間- 如果你知道 請(qǐng)大神 告知 --- 是否有延遲
Swift 第二種. 參考網(wǎng)上的大牛們的
// 首先給UIButton 協(xié)議個(gè)類的擴(kuò)展
import UIKit
import Foundation
public extension UIButton{
private struct cs_associatedKeys {
static var accpetEventInterval = "cs_acceptEventInterval"
static var acceptEventTime = "cs_acceptEventTime"
}
/**
重復(fù)點(diǎn)擊的時(shí)間間隔--自己手動(dòng)隨意設(shè)置
利用運(yùn)行時(shí)機(jī)制 將accpetEventInterval值修改
*/
var cs_accpetEventInterval: TimeInterval {
get {
if let accpetEventInterval = objc_getAssociatedObject(self, &cs_associatedKeys.accpetEventInterval) as? TimeInterval {
return accpetEventInterval }
return 0.4
}
set {
objc_setAssociatedObject(self, &cs_associatedKeys.accpetEventInterval, newValue as TimeInterval, .OBJC_ASSOCIATION_RETAIN_NONATOMIC)
}
}
/**
重復(fù)點(diǎn)擊的時(shí)間間隔--自己手動(dòng)隨意設(shè)置
利用運(yùn)行時(shí)機(jī)制 將acceptEventTime值修改
*/
var cs_acceptEventTime : TimeInterval {
get {
if let acceptEventTime = objc_getAssociatedObject(self, &cs_associatedKeys.acceptEventTime) as? TimeInterval {
return acceptEventTime
}
return 0.4
}
set {
objc_setAssociatedObject(self, &cs_associatedKeys.acceptEventTime, newValue as TimeInterval, .OBJC_ASSOCIATION_RETAIN_NONATOMIC)
}
}
/**
重寫初始化方法,在這個(gè)方法中實(shí)現(xiàn)在運(yùn)行時(shí)方法替換
*/
override open class func initialize() {
let changeBefore: Method = class_getInstanceMethod(self, #selector(UIButton.sendAction(_:to:for:)))
let changeAfter: Method = class_getInstanceMethod(self, #selector(UIButton.cs_sendAction(action:to:for:)))
method_exchangeImplementations(changeBefore, changeAfter)
}
/**
在這個(gè)方法中判斷接收到當(dāng)前事件的時(shí)間間隔是否滿足我們所設(shè)定的間隔,會(huì)一直循環(huán)調(diào)用到滿足才會(huì)return
*/
func cs_sendAction(action: Selector, to target: AnyObject?, for event: UIEvent?) {
if NSDate().timeIntervalSince1970 - self.cs_acceptEventTime < self.cs_accpetEventInterval {
return
}
if self.cs_accpetEventInterval > 0 {
self.cs_acceptEventTime = NSDate().timeIntervalSince1970
}
self.cs_sendAction(action: action, to: target, for: event)
}
}
第二種 測試
import UIKit
class SWIFTViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
view.backgroundColor = UIColor.gray
// 第二種方式
StepTwo()
}
fileprivate func StepTwo(){
let btn = UIButton(frame: CGRect(x: 100, y: 250, width: 100, height: 100))
btn.backgroundColor = UIColor.red
btn.addTarget(self, action: #selector(btnClickTwo(_:)), for: .touchUpInside)
view.addSubview(btn)
}
func btnClickTwo(_ btn:UIButton){
print("Swift 打印不出時(shí)間- 如果你知道 請(qǐng)大神 告知 --- 是否有延遲")
}
}
// 測試
Swift 打印不出時(shí)間- 如果你知道 請(qǐng)大神 告知 --- 是否有延遲
Swift 打印不出時(shí)間- 如果你知道 請(qǐng)大神 告知 --- 是否有延遲
Swift 打印不出時(shí)間- 如果你知道 請(qǐng)大神 告知 --- 是否有延遲
