按钮到计时
一个倒计时按钮扩展
.h文件
@interface UIButton (CountDown)
-(void)startTime:(NSInteger )timeout title:(NSString *)tittle waitTittle:(NSString *)waitTittle;
@end
.m文件
#import "UIButton+countDown.h"
@implementation UIButton (countDown)
-(void)startTime:(NSInteger )timeout title:(NSString *)tittle waitTittle:(NSString *)waitTittle{
__block NSInteger timeOut=timeout; //倒计时时间
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);
dispatch_source_set_timer(_timer,dispatch_walltime(NULL, 0),1.0*NSEC_PER_SEC, 0); //每秒执行
dispatch_source_set_event_handler(_timer, ^{
if(timeOut<=0){ //倒计时结束，关闭
dispatch_source_cancel(_timer);
dispatch_async(dispatch_get_main_queue(), ^{
//设置界面的按钮显示 根据自己需求设置
[self setTitle:tittle forState:UIControlStateNormal];
self.userInteractionEnabled = YES;
});
}else{
// int minutes = timeout / 60;
int seconds = timeOut % 60;
NSString *strTime = [NSString stringWithFormat:@"%.2d", seconds];
dispatch_async(dispatch_get_main_queue(), ^{
//设置界面的按钮显示 根据自己需求设置
NSLog(@"____%@",strTime);
[self setTitle:[NSString stringWithFormat:@"%@%@",strTime,waitTittle] forState:UIControlStateNormal];
self.userInteractionEnabled = NO;
});
timeOut--;
}
});
dispatch_resume(_timer);
}
@end
