In my methods that use the variable dateString,
I used:
if([dateString length] == 0){
//perform standard procedure
}
else {
//what I want it to do
}
Pregunta
I have a global variable in FirstViewController.h
extern NSString *dateString;
it records the date/time of when I press saveText button. There is another button called readText which pushes a UITableView. The first cell on this table will print the date saved.
However, this only works if I first press the saveText button. Otherwise, if I just press readText, it crashes. How can I get it so that if there is no current datetime saved, that it doesn't crash?
Here is where I wrote the timestamp for saveButton:
-(IBAction)saveText:(id)sender{
//code to save text, irrelevant to the question//
dateString = [NSDateFormatter localizedStringFromDate:[NSDate date]
dateStyle:NSDateFormatterShortStyle
timeStyle:NSDateFormatterShortStyle];
NSLog(@"%@",dateString);
}
and here is the code to load the tableviewcells with the timestamp
- (void)viewDidLoad
{
[super viewDidLoad];
NSString *str = @"Text- saved on: ";
str = [str stringByAppendingString: dateString];
self.list = [[NSArray alloc] initWithObjects: str, nil];
}
Solución
In my methods that use the variable dateString,
I used:
if([dateString length] == 0){
//perform standard procedure
}
else {
//what I want it to do
}