Summary of entry-level errors in ios development

(1) Thread 1: Program formatted ed signal: "SIGABRT" an error that is frequently encountered by beginners in application development: the cause of this error is that the view is not initialized. After careful reading, we found that the view attribute of the File's Owner was not initialized. Click view on the right side of the xib view operation interface and drag view to the left side of View V to connect view to view. Conclusion: the reason for the above situation is that the instance attribute of the class is not initialized. (2) solution to EXC_BAD_ACCESS error caused by Text Field: Disable Auto-Correction in the simulator by setting Keyboard (Settings-> General-> Keyboard ).