Last night, that was WWDC 2015! A number of new stuff from Apple have been announced.A new Apple TV, a new version of watchOS and a new version of Siri. The most eyes catching things is iPhone 6s. This version has a new color, pink(Rose Gold)! My wife like this color! Moreover, it has a camera which supports 4K video and a faster CPU. It has force touch too, That sounds cool! iPhone 6s is from $649, iPhone 6s is from $749. Another new hardware is iPad Pro, which is a biggest version of iPad,12.1 inch screen and it got a Pen too, the pen calls Apple Pencil. That made drawing easier.
Well, the news make me to consider for buying some new hardware!

I copied over my project from Visual Studio to Xarmarin Studio. Then I got an error with the message:Failed to load output manifest for actool for the file. I tried to modify some files, that doesn't work. I found this way is foolish. Actually, I need to clean my solution file, the error has gone!

There are no checkbox controls in Xamarin Forms. You can build the custom components with the custom renderers for this purpose. That is very complex. I chose to use a simpler way, using an Image control and TapGestureRecognizer. If the image is checked, then print the checked image, otherwise, just print an empty square. That is easy.

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I found there are a number of times, in Visual Studio, when I stopped an iOS app. My visual studio became not responding and holding up for more than a minute. I found the issue, that may be because of I used a Mac Book and a real PC(not a VM) to build, there may have network issues. The issue is between iOS build host and Visual Studio. After I close iOS Build Host, and open it again, then visual studio is working normally.

I found ListView control in Android is very easy to use, that is very good. Even there is a method to set the empty view, it will display it when the list context is empty.
You put any view in there. I put a LinearView with a Textview. That is easy!

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