核心數據NSPredicate with SQLITE store

Question

此代碼返回0個不正確的對象。但是，刪除謂詞時，獲取請求會返回所有對象。

NSError *error = nil; 

NSEntityDescription *entityDescription = [NSEntityDescription            entityForName:@"Person" inManagedObjectContext:[self managedObjectContext]]; 

NSPredicate * pr = [NSPredicate predicateWithFormat:@"%K beginswith '%@' ", 
        @"FullName", searchText]; 

//NSPredicate * pr = [NSPredicate predicateWithFormat:@"PersonID == %@", searchText]; Works fine 


NSFetchRequest *request = [[[NSFetchRequest alloc] init] autorelease]; 
[request setEntity:entityDescription]; 
[request setPredicate:pr]; 
NSArray * arr = [[self managedObjectContext] executeFetchRequest:request error:&error]; 

FullName屬性包含unicode數據（阿拉伯語）。

任何幫助表示讚賞。

Answer 1

嘗試：

NSPredicate * pr = [NSPredicate predicateWithFormat:@"FullName beginswith %@", searchText];