方法一 設(shè)置enabled或userInteractionEnabled屬性
方法二 借助cancelPreviousPerformRequestsWithTarget:selector:object實(shí)現(xiàn)
方法三 通過runtime交換方法實(shí)現(xiàn)
方法1
通過UIButton的enabled屬性和userInteractionEnabled屬性控制按鈕是否可點(diǎn)擊律歼。此方案在邏輯上比較清晰民镜、易懂，但具體代碼書寫分散险毁，常常涉及多個地方制圈。
- (void)drawBtn {
UIButton *btn = [[UIButton alloc] initWithFrame:CGRectMake(0, 0, 200, 100)];
[btn setTitle:@"按鈕點(diǎn)擊" forState:UIControlStateNormal];
[btn setTitleColor:[UIColor redColor] forState:UIControlStateNormal];
// 按鈕不可點(diǎn)擊時,文字顏色置灰
[btn setTitleColor:[UIColor grayColor] forState:UIControlStateDisabled];
[btn setTitleColor:[UIColor blueColor] forState:UIControlStateHighlighted];
btn.center = self.view.center;
[btn addTarget:self action:@selector(tapBtn:) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:btn];
}
使用
- (void)tapBtn:(UIButton *)btn {
NSLog(@"按鈕點(diǎn)擊...");
btn.enabled = NO;
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(2.0 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
btn.enabled = YES;
});
}
方法2
通過 NSObject 的兩個方法
// 此方法會在連續(xù)點(diǎn)擊按鈕時取消之前的點(diǎn)擊事件，從而只執(zhí)行最后一次點(diǎn)擊事件
+ (void)cancelPreviousPerformRequestsWithTarget:(id)aTarget selector:(SEL)aSelector object:(nullable id)anArgument;
// 多長時間后做某件事情
- (void)performSelector:(SEL)aSelector withObject:(nullable id)anArgument afterDelay:(NSTimeInterval)delay;
使用
/** 使用 */
- (void)tapBtn:(UIButton *)btn {
NSLog(@"按鈕點(diǎn)擊了...");
// 此方法會在連續(xù)點(diǎn)擊按鈕時取消之前的點(diǎn)擊事件畔况，從而只執(zhí)行最后一次點(diǎn)擊事件
[NSObject cancelPreviousPerformRequestsWithTarget:self selector:@selector(buttonClickedAction:) object:btn];
// 多長時間后做某件事情
[self performSelector:@selector(buttonClickedAction:) withObject:btn afterDelay:2.0];
}
- (void)buttonClickedAction:(UIButton *)btn {
NSLog(@"真正開始執(zhí)行業(yè)務(wù) - 比如網(wǎng)絡(luò)請求...");
}
方法3
通過Runtime交換UIButton的響應(yīng)事件方法鲸鹦，從而控制響應(yīng)事件的時間間隔。
實(shí)現(xiàn)步驟如下:
- 創(chuàng)建一個UIButton的分類跷跪，使用runtime增加public屬性cs_eventInterval和private屬性cs_eventInvalid馋嗜。
- 在+load方法中使用runtime將UIButton的-sendAction:to:forEvent:方法與自定義的cs_sendAction:to:forEvent:方法進(jìn)行交換
- 使用cs_eventInterval作為控制cs_eventInvalid的計時因子，用cs_eventInvalid控制UIButton的event事件是否有效吵瞻。
@interface UIButton (Extension)
/** 時間間隔 */
@property(nonatomic, assign)NSTimeInterval cs_eventInterval;
@end
#import "UIButton+Extension.h"
#import <objc/runtime.h>
static char *const kEventIntervalKey = "kEventIntervalKey"; // 時間間隔
static char *const kEventInvalidKey = "kEventInvalidKey"; // 是否失效
@interface UIButton()
/** 是否失效 - 即不可以點(diǎn)擊 */
@property(nonatomic, assign)BOOL cs_eventInvalid;
@end
@implementation UIButton (Extension)
+ (void)load {
// 交換方法
Method clickMethod = class_getInstanceMethod(self, @selector(sendAction:to:forEvent:));
Method cs_clickMethod = class_getInstanceMethod(self, @selector(cs_sendAction:to:forEvent:));
method_exchangeImplementations(clickMethod, cs_clickMethod);
}
#pragma mark - click
- (void)cs_sendAction:(SEL)action to:(id)target forEvent:(UIEvent *)event {
if (!self.cs_eventInvalid) {
self.cs_eventInvalid = YES;
[self cs_sendAction:action to:target forEvent:event];
[self performSelector:@selector(setCs_eventInvalid:) withObject:@(NO) afterDelay:self.cs_eventInterval];
}
}
#pragma mark - set | get
- (NSTimeInterval)cs_eventInterval {
return [objc_getAssociatedObject(self, kEventIntervalKey) doubleValue];
}
- (void)setCs_eventInterval:(NSTimeInterval)cs_eventInterval {
objc_setAssociatedObject(self, kEventIntervalKey, @(cs_eventInterval), OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}
- (BOOL)cs_eventInvalid {
return [objc_getAssociatedObject(self, kEventInvalidKey) boolValue];
}
- (void)setCs_eventInvalid:(BOOL)cs_eventInvalid {
objc_setAssociatedObject(self, kEventInvalidKey, @(cs_eventInvalid), OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}
用法
/** 用法 */
- (void)drawExpecialBtn{
UIButton *btn = [[UIButton alloc] initWithFrame:CGRectMake(0, 0, 200, 100)];
[btn setTitle:@"按鈕點(diǎn)擊" forState:UIControlStateNormal];
[btn setTitleColor:[UIColor redColor] forState:UIControlStateNormal];
// 按鈕不可點(diǎn)擊時,文字顏色置灰
[btn setTitleColor:[UIColor grayColor] forState:UIControlStateDisabled];
[btn setTitleColor:[UIColor blueColor] forState:UIControlStateHighlighted];
btn.center = self.view.center;
[btn addTarget:self action:@selector(tapBtn:) forControlEvents:UIControlEventTouchUpInside];
btn.cs_eventInterval = 2.0;
[self.view addSubview:btn];
}
- (void)tapBtn:(UIButton *)btn {
NSLog(@"按鈕點(diǎn)擊...");
}
