iOS FMDB中的使用

n使用事务

[queue inTransaction:^(FMDatabase *db, BOOL *rollback) {

[db executeUpdate:@"INSERT INTO t_student(name) VALUES (?)", @"Jack"];

[db executeUpdate:@"INSERT INTO t_student(name) VALUES (?)", @"Rose"];

[db executeUpdate:@"INSERT INTO t_student(name) VALUES (?)", @"Jim"];

FMResultSet *rs = [db executeQuery:@"select * from t_student"];

while ([rs next]) {

// …

}

}];

n事务回滚

*rollback = YES;

Begin transaction

Update t_money set money = 500 where name = ‘a’

Rollback transaction

Update t_money set money = 1000 where name = ‘b’

Commit transaction