Recently, I traveled to Seoul from Hong Kong. I rented a mobile modem from Visond Data. That costed HKD$60 per day and HKD$1000 as the deposit. This is quite reasonable. Moreover, the process is convenient. I booked the modem online, and then you can pa… more »

I tried to add a button which will jump a Navigation Control Screen after it clicked. But I ran the application, after the button is clicked, I got this error, 'Push segues can only be used when the source controller is managed by an instance of… more »

During recent Years,"Social Media" is a popular term in the marketing world. A number of people have asked me what is "Social Media Marketing". Social Media is a good tool for marketing. It helps to spread out your name from your friends to their… more »