遇到xcode app無法佈到模擬器上

這時候請先移除模擬器上之前所寫的程式
接著關閉模擬器
然後在xcode執行product->clearn
然後重新build

I've tried the following:

1. Rebooting mac
2. Deleting application from iPhone and rebooting iPhone (although my power button no longer works on my iPhone, so I had to run down the entire battery to try this)
3. Cleaned project and rebuilt