核心数据NSPredicate与SQLITE商店

Question

此代码返回0个不正确的对象.但是,删除谓词时,获取请求将返回所有对象.

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];