小编sre*_*vas的帖子

在UITextField中,我们仅输入数字并限制最多3个数字用于下面的代码

- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string  {


    NSUInteger newLength = [textField.text length] + [string length] - range.length;

    NSCharacterSet *cs = [[NSCharacterSet characterSetWithCharactersInString:NUMBERS_ONLY] invertedSet];

    NSString *filtered = [[string componentsSeparatedByCharactersInSet:cs] componentsJoinedByString:@""];

    while (newLength < CHARACTER_LIMIT) {
        return [string isEqualToString:filtered];
    }

/* Limits the no of characters to be enter in text field */

    return (newLength > CHARACTER_LIMIT ) ? NO : YES; 

}

当我长按文本字段(如下图所示)并在两个数字之间输入字符串时,它也允许所有特殊字符和租船人.

我正在使用FMDB包装器我使用此代码

- (BOOL)update:(NSString *) Body fromValue:(NSString *)froms {

    BOOL success = NO;
    FMResultSet *rs;
//I have **searchTable** and in that folder name **OFFICE**  

    rs = [self.database executeQuery:@"select searchId,body from searchTable WHERE folder = 'OFFICE'"];


    NSInteger primaryKey = -1;
    NSString *body = nil;
    NSString *md5OfSearchEmailBody = nil;
    while ([rs next]) {
        primaryKey  = [rs intForColumn:@"searchId"];
        body = [rs stringForColumn:@"body"];
    }           

    [rs close];
    return success;
}

第一次

- (BOOL)update:(NSString *) Body fromValue:(NSString *)froms{
}

方法工作正常.在循环第二次它不工作

调用sqlite3_step(21:out of memory)rs时出错

如何解决这个问题呢

我在使用设备时使用代码删除临时目录文件.

-(void) clearAllTempFiles {
    NSString *path = NSTemporaryDirectory();
    if ([path length] > 0)
    {
        NSError *error = nil;  
        NSFileManager *fileManager = [NSFileManager defaultManager];

        BOOL deleted = [fileManager removeItemAtPath:path error:&error];

        if (deleted != YES || error != nil)
        {

        }
        else{
            // Recreate the Documents directory
            [fileManager createDirectoryAtPath:path withIntermediateDirectories:NO attributes:nil error:&error];
        }

    }
}

它不能正常工作？这是从临时目录中删除文件的正确代码？

请帮助我？