TableView reloadData旋转滞后

Question

在我的willAnimateRotationToInterfaceOrientation方法中，我具有以下内容：

-(void)willAnimateRotationToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration {

if (UIDeviceOrientationIsLandscape([UIDevice currentDevice].orientation)) {
    if (IS_IPHONE_5) {
        _headerImage.frame = CGRectMake(0, 0, [[UIScreen mainScreen] bounds].size.height, 50);
        NSURLRequest *_request = [NSURLRequest requestWithURL:[NSURL URLWithString:[Shared LogoLandPhoneRet]]];
        [_headerImage setImageWithURLRequest:_request andDefaultImageName:nil andUserData:nil target:self sucessful:nil failed:nil];
    } else {
        _headerImage.frame = CGRectMake(0, 0, [[UIScreen mainScreen] bounds].size.height, 50);
        NSURLRequest *_request = [NSURLRequest requestWithURL:[NSURL URLWithString:[Shared LogoLandPhone]]];
        [_headerImage setImageWithURLRequest:_request andDefaultImageName:nil andUserData:nil target:self sucessful:nil failed:nil];
    }
} else {
    if (IS_IPHONE_5) {
        _headerImage.frame = CGRectMake(0, 0, [[UIScreen mainScreen] bounds].size.width, 50);
        NSURLRequest *_request = [NSURLRequest requestWithURL:[NSURL URLWithString:[Shared LogoPortPhoneRet]]];
        [_headerImage setImageWithURLRequest:_request andDefaultImageName:nil andUserData:nil target:self sucessful:nil failed:nil];
    } else {
        _headerImage.frame = CGRectMake(0, 0, [[UIScreen mainScreen] bounds].size.width, 50);
        NSURLRequest *_request = [NSURLRequest requestWithURL:[NSURL URLWithString:[Shared LogoPortPhone]]];
        [_headerImage setImageWithURLRequest:_request andDefaultImageName:nil andUserData:nil target:self sucessful:nil failed:nil];
    }
}

//    [NSThread detachNewThreadSelector:@selector(doTable) toTarget:self withObject:NULL];
[_feedTable reloadData];
}

但是，当我现在旋转设备时，它会滞后约2-3秒才能真正旋转。 关于这可能是什么的任何建议？

Answer 1

滞后还是冻结界面？ 我的猜测是请求冻结了接口，因此您应该尝试使请求异步或尝试进行缓存。