核心数据NSPredicate with SQLITE store

Question

此代码返回0个不正确的对象。但是，删除谓词时，获取请求会返回所有对象。

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属性包含unicode数据（阿拉伯语）。

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Answer 1

尝试：

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