try - catch block in Objective-C

Question

Why doesn t  try block work  It crashed the app  but it was supposed to be caught by the  try block    NSString  test    NSString stringWithString   ss       try        test characterAtIndex 6         catch  NSException   e        NSLog   Exception       e        finally       NSLog   finally

User · Accepted Answer

Now I ve found the problem   Removing the obj exception throw from my breakpoints solved this  Now it s caught by the  try block and also  NSSetUncaughtExceptionHandler will handle this if a  try block is missing

User · Answer

Objective-C is not Java  In Objective-C exceptions are what they are called  Exceptions  Don   t use them for error handling  It   s not their proposal  Just check the length of the string before using characterAtIndex and everything is fine

User · Answer

All work perfectly     NSString  test     quot test quot    unichar a   int index   5         try       a    test characterAtIndex index        catch  NSException  exception        NSLog   quot    quot   exception reason       NSLog   quot Char at index  d cannot be found quot   index       NSLog   quot Max index is   lu quot    test length  - 1        finally       NSLog   quot Finally condition quot        Log      NSCFConstantString characterAtIndex    Range or index out of bounds Char at index 5 cannot be found Max index is  3 Finally condition

[iphone] @try - catch block in Objective-C

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