// 点击提示框视图以外的其他地方时隐藏弹框
-(void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event{
CGPoint point = [[touches anyObject] locationInView:self];
point = [self.alertView.layer convertPoint:point fromLayer:self.layer];
if (![self.alertView.layer containsPoint:point]) {
self.hidden = YES;
}
}