Get all items starting with a given string

I want to get all items which start with a given string.

The code below returns thousands of items when I do not use the predicate, but when it is present I get zero records returned.

I have tested with field names and terms which for sure exist in the sqlite db.

NSManagedObjectContext *context        = [[DataSource sharedInstance] managedObjectContext];
NSEntityDescription    *entityDesc     = [NSEntityDescription entityForName:@"Event" inManagedObjectContext:context];
NSSortDescriptor       *sortDescriptor = [[NSSortDescriptor alloc] initWithKey:@"startTime" ascending:YES];
NSPredicate            *predicate      = [NSPredicate predicateWithFormat:@"(%@ beginswith %@)", fieldName, searchTerm, nil];

NSFetchRequest *request = [[NSFetchRequest alloc] init];

[request setEntity:entityDesc];
[request setPredicate:predicate];
[request setSortDescriptors:[NSArray arrayWithObject:sortDescriptor]];

NSError *error = nil;
NSArray *objects = [context executeFetchRequest:request error:&error];
[request release];

return objects;

Solved

The following solved the problem:

NSString               *str            = [NSString stringWithFormat:@"%@ beginswith \"%@\"", fieldName, titleTerm];
NSPredicate            *开发者_高级运维predicate      = [NSPredicate predicateWithFormat:str];

The content was having wrong quotation wrappings.

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The following solved the problem:

NSString               *str            = [NSString stringWithFormat:@"%@ beginswith \"%@\"", fieldName, titleTerm];
NSPredicate            *predicate      = [NSPredicate predicateWithFormat:str];

The content was having wrong quotation wrappings.