title: my app crash but not show error xcode on iphone sdk
body: <p>i am developing drawing application in ios. i am touchesmoved event continuos execute after some times crashed my application.but,it's not show error message console and shows (gdb) in console and project is running state it's shows by thread is paused.i am not bookmark statement's at any point..!</p>
  
  <p>My state below screen shot</p>
  
  <p><img src="https://i.stack.imgur.com/RJb04.png" alt="enter image description here"></p>