/**倒計時@param timeNum 倒計時時長@param endTitle 倒計時結束后的文本@param countingTitleColor 倒計時中的title顏色@param endTitleColor 倒計時結束后的title顏色@param countingBgColor 倒計時中的背景顏色@param endBgColor 倒計時結束后的背景顏色注：最初的文字顏色和文字需要在添加控件的Container里設定*/ - (void)startCountDownTime:(NSInteger)timeNum endTitle:(NSString *)endTitle countingTitleColor:(NSString *)countingTitleColor endTitleColor:(NSString *)endTitleColor countingBgColor:(NSString *)countingBgColor endBgColor:(NSString *)endBgColor;復制代碼#pragma mark - *************** 倒計時- (void)startCountDownTime:(NSInteger)timeNum endTitle:(NSString *)endTitle countingTitleColor:(NSString *)countingTitleColor endTitleColor:(NSString *)endTitleColor countingBgColor:(NSString *)countingBgColor endBgColor:(NSString *)endBgColor {//倒計時時間__block NSInteger timeOut = timeNum;dispatch_queue_t queue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0);dispatch_source_t _timer = dispatch_source_create(DISPATCH_SOURCE_TYPE_TIMER, 0, 0, queue);//每秒執行一次dispatch_source_set_timer(_timer, dispatch_walltime(NULL, 0), 1.0 * NSEC_PER_SEC, 0);dispatch_source_set_event_handler(_timer, ^{//倒計時結束，關閉if (timeOut <= 0) {dispatch_source_cancel(_timer);dispatch_async(dispatch_get_main_queue(), ^{self.layer.backgroundColor = [UIColor colorWithHex:endBgColor].CGColor;[self setTitle:endTitle forState:UIControlStateNormal];[self setTitleColor:[UIColor colorWithHex:endTitleColor] forState:UIControlStateNormal];self.userInteractionEnabled = YES;});} else {//倒計時中dispatch_async(dispatch_get_main_queue(), ^{self.layer.backgroundColor = [UIColor colorWithHex:countingBgColor].CGColor;[self setTitle:[NSString stringWithFormat:@"%lds重發", timeOut] forState:UIControlStateNormal];[self setTitleColor:[UIColor colorWithHex:countingTitleColor] forState:UIControlStateNormal];self.userInteractionEnabled = NO;});timeOut--;}});dispatch_resume(_timer); } 復制代碼

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調用：

[self.btn startCountDownTime:10 endTitle:@"重新發送" countingTitleColor:@"e0e0e0" endTitleColor:@"ff0025" countingBgColor:@"ffffff" endBgColor:@"ddb86b"]; 復制代碼

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