当MapKit注释被点击时，应用程序崩溃了

I am developing app to virtualize twitter trends. I fetched the locations of places and create annotation for each of them. Unfortunately when I tap the annotation, the app crashes and gives a sigabrt error on main.m file. In my first run it worked, but after that every time I get the error. I don't know what I changed.I am developing app to virtualize twitter trend