iOS 非主线程不能执行UI操作

解决方案，将UI操作放在主线程

方法一：

if ([NSThreadisMainThread]) {

          UIComponent::getInstance()->XXX(NULL);

    }else {

        dispatch_async(dispatch_get_main_queue(), ^{

            UIComponent::getInstance()->XXX(NULL);

        });

    }

方法二：

performSelectorOnMainThread
[self performSelectorOnMainThread:@selector(updateUI:) withObject:image waitUntilDone:NO];