Case in protected switch

Possible Duplicate:
When converting a project to use ARC what does “switch case is in protected scope” mean?

Got the following xcode: But when i try to put something in case 1 (or empty) it's giving me an error?

Weird problem because i dont know what a protected switch is and how i should fix it. Does anyone has a solution or clue to fix this? Weird..

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
UIViewController *controller;


switch(indexPath.row) {
case 0:
NSLog(@"0");


//create instance of EKEventStore
EKEventStore *eventStore = [[EKEventStore alloc] init];


//creating instance of EKEvent
EKEvent *event  = [EKEvent eventWithEventStore:eventStore];


//setting the appropriate properties of the new event
event.title     = @"Woow";


//event.startDate = [[NSDate alloc] init];






NSDateComponents *myDate2 = [[NSDateComponents alloc] init];
[myDate2 setDay:13];
[myDate2 setMonth:12];
[myDate2 setYear:2011];
[myDate2 setHour:00];
[myDate2 setMinute:34];


event.startDate = [[NSCalendar currentCalendar] dateFromComponents:myDate2];


event.endDate   = [[NSDate alloc] initWithTimeInterval:3600 sinceDate:event.startDate];
event.location = @"game2";
event.notes = @" game";


event.alarms = [NSArray arrayWithObject:[EKAlarm alarmWithAbsoluteDate:event.startDate]];


[event setCalendar:[eventStore defaultCalendarForNewEvents]];
NSError *error;
[eventStore saveEvent:event span:EKSpanThisEvent error:&error];


break;


case 1:
NSLog(@"1");












break;












}


{






self.EKController.title = [self.EKList objectAtIndex:[indexPath row]];












}


}




@end

But an error:

Error

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最佳答案

You should wrap each switch statement with {} braces. For example:

switch (someInt) {
case 0:
{
NSLog(@"Case 0");
}
break;
case 1:
{
NSLog(@"Case 1");
}
break;
}

This has been answered already here by the way - When converting a project to use ARC what does "switch case is in protected scope" mean?

小开

In general, you should never declare variables inside a case body, unless you wrap the case body in {}. Most C compilers will flag that as an error under several circumstances (though often a very obscure-sounding error).

The reason for this is that the compiler can't tell where the scope of the variable ends, and if you have a declaration in the first case body then it looks like the second case is a branch into the middle of the variable's scope, making the compiler wonder how/if it should be initialized.


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