前言是否有html标签(Is there an html tag for foreword)

 如果您的代码在第一个[realm beginWriteTransaction];停止[realm beginWriteTransaction]; 声明，这似乎意味着另一个写事务已在其他地方打开。 
 
 Realm只允许一个事务一次修改磁盘上的数据，并故意停止任何新事务，直到当前事务完成为止。 我建议为初学者调查一下。 您可以通过-[RLMRealm inWriteTransaction]属性检查RLMRealm是否已经在事务中。 :) 
 
 此外，如果批量写入尽可能少的事务，Realm会更好。 由于您在for循环中为每次迭代打开和关闭事务，因此您在那里创建了2000个单独的事务，这可能会轻易地降低Realm的速度。 
 
 如果您将代码组织成这样，代码可能会更快地运行： 
 
[realm beginWriteTransaction];
for (int i = 0 ; i < 2000; i++) {
    PeopleInformation *info = [[PeopleInformation alloc] init];

    info.name = [NSString stringWithFormat:@"%@ %d",@"Rohit",i];
    info.city = @"Delhi";

    [realm addObject:info];
}
[realm commitWriteTransaction];
 
 让我知道这是否有帮助！ 

If your code is halting at the first [realm beginWriteTransaction]; statement, that would seem to imply that another write transaction is already open somewhere else.
 
Realm only allows one transaction to modify the data on disk at a time, and it intentionally stops any new transactions starting until the current one has finished. I'd recommend looking into that for starters. You can check to see if a RLMRealm is already in a transaction through the -[RLMRealm inWriteTransaction] property. :)
 
Additionally, Realm works better if you batch writes into as few transactions as possible. Since you're opening and closing a transaction for each iteration in that for loop, you're creating 2000 separate transactions there, which could easily slow Realm down.
 
Your code might run more quickly if you structured it like this instead:
 
[realm beginWriteTransaction];
for (int i = 0 ; i < 2000; i++) {
    PeopleInformation *info = [[PeopleInformation alloc] init];

    info.name = [NSString stringWithFormat:@"%@ %d",@"Rohit",i];
    info.city = @"Delhi";

    [realm addObject:info];
}
[realm commitWriteTransaction];
 
Let me know if that helped at all!