如何查看以下 FMDatabase executeUpdate 语句是否成功？

Question

以下代码没有给出任何错误，但没有进行插入，我不知道为什么。我还是个新手，想知道查看此查询结果或查看是否有错误消息的最佳方法。我确定它很简单，例如“BOOL 成功 = [数据库执行更新...] 然后打印 BOOL。提前致谢。

if ([database open]) {
    [database executeUpdate:@"insert into CONDITION (condition_id, condition_name, condition_detail, condition_area, condition_date, active) values(?, ?, ?, ?, ?)",
    [NSNumber numberWithInt:self.condition_id], self.condition_name, self.condition_detail, self.condition_area, self.condition_date, [NSNumber numberWithInt:myInt] ];

    [database close];

Answer 1

executeUpdate方法有返回值，FMDatabase保存lastErrorMessage：

BOOL isSuccessful = [database executeUpdate:@"insert into CONDITION (condition_id, condition_name, condition_detail, condition_area, condition_date, active) values(?, ?, ?, ?, ?)",
    [NSNumber numberWithInt:self.condition_id], self.condition_name, self.condition_detail, self.condition_area, self.condition_date, [NSNumber numberWithInt:myInt] ];
if (!isSuccessful) {
    NSLog(@"%@", database.lastErrorMessage);
}