使用行ID检索数据并使用label在表格视图单元格中显示正在覆盖值
我可以通过从数据库中检索数据在正确的单元格中显示正确的提醒，但问题是第3次提醒被第2次和第4次提醒被覆盖第3次和第3次提醒被第2次提醒覆盖我已经使用了不同的标签并将其作为子视图添加到表格视图的单元格中。这是我的代码，请帮我修复它
NSString * CellId = [NSString stringWithFormat：@“S％1dR％1d”，indexPath.section，indexPath.row];
UITableViewCell *cell = (UITableViewCell *)[view dequeueReusableCellWithIdentifier:CellId];
if (cell == nil)
{
cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleValue1 reuseIdentifier:CellId] autorelease];
view.backgroundColor = [UIColor clearColor];
cell.backgroundColor = [[UIColor alloc]initWithPatternImage:[UIImage imageNamed:@"reminderbutton.png"]];
if (indexPath.section == 0)
{
//Retrieve the values of database
const char *dbpath = [self.databasePath UTF8String];
sqlite3_stmt *statement;
switch (indexPath.row)
{
case 0:
{
UILabel *label1 = [[[UILabel alloc]initWithFrame:CGRectMake(26, 3, 30, 40)]autorelease];
label1.backgroundColor = [UIColor clearColor];
label1.textColor = [UIColor whiteColor];
UILabel *label2 = [[[UILabel alloc]initWithFrame:CGRectMake(45, 3, 100, 40)]autorelease];
label2.backgroundColor = [UIColor clearColor];
label2.textColor = [UIColor whiteColor];
UILabel *label3 = [[[UILabel alloc]initWithFrame:CGRectMake(119, 3, 100, 40)]autorelease];
label3.backgroundColor = [UIColor clearColor];
label3.textColor = [UIColor whiteColor];
UILabel *label4 = [[[UILabel alloc]initWithFrame:CGRectMake(198, 3, 120, 40)]autorelease];
label4.backgroundColor = [UIColor clearColor];
label4.textColor = [UIColor whiteColor];
if (sqlite3_open(dbpath, &remindersDB) == SQLITE_OK)
{
NSString *querySQL = [NSString stringWithFormat:@"SELECT * FROM reminders"];
const char *query_stmt = [querySQL UTF8String];
if (sqlite3_prepare_v2(self.remindersDB ,query_stmt , -1, &statement, NULL) == SQLITE_OK)
{
if (sqlite3_step(statement) == SQLITE_ROW)
{
NSString *ID = [[[NSString alloc] initWithUTF8String:(const char *) sqlite3_column_text(statement, 0)]autorelease];
NSString *nameField = [[[NSString alloc]initWithUTF8String:(const char *) sqlite3_column_text(statement, 1)]autorelease];
NSString *eventField = [[[NSString alloc]initWithUTF8String:(const char *) sqlite3_column_text(statement, 2)]autorelease];
NSString *dateField = [[[NSString alloc]initWithUTF8String:(const char *) sqlite3_column_text(statement, 3)]autorelease];
label1.text = ID;
label2.text = nameField;
label3.text = eventField;
label4.text = dateField;
}
sqlite3_finalize(statement);
}
sqlite3_close(self.remindersDB);
}
[cell addSubview:label1];
[cell addSubview:label2];
[cell addSubview:label3];
[cell addSubview:label4];
}
break;
case 1:
{
UILabel *label5 = [[[UILabel alloc]initWithFrame:CGRectMake(26, 3, 30, 40)]autorelease];
label5.backgroundColor = [UIColor clearColor];
label5.textColor = [UIColor whiteColor];
UILabel *label6 = [[[UILabel alloc]initWithFrame:CGRectMake(48, 3, 100, 40)]autorelease];
label6.backgroundColor = [UIColor clearColor];
label6.textColor = [UIColor whiteColor];
UILabel *label7 = [[[UILabel alloc]initWithFrame:CGRectMake(119, 3, 100, 40)]autorelease];
label7.backgroundColor = [UIColor clearColor];
label7.textColor = [UIColor whiteColor];
UILabel *label8 = [[[UILabel alloc]initWithFrame:CGRectMake(198, 3, 120, 40)]autorelease];
label8.backgroundColor = [UIColor clearColor];
label8.textColor = [UIColor whiteColor];
if (sqlite3_open(dbpath, &remindersDB) == SQLITE_OK)
{
NSString *querySQL = [NSString stringWithFormat:@"SELECT * from reminders order by id limit 1 offset 1"];
const char *query_stmt = [querySQL UTF8String];
if (sqlite3_prepare_v2(self.remindersDB ,query_stmt , -1, &statement, NULL) == SQLITE_OK)
{
if (sqlite3_step(statement) == SQLITE_ROW)
{
NSString *ID = [[[NSString alloc] initWithUTF8String:(const char *) sqlite3_column_text(statement, 0)]autorelease];
NSString *nameField = [[[NSString alloc]initWithUTF8String:(const char *) sqlite3_column_text(statement, 1)]autorelease];
NSString *eventField = [[[NSString alloc]initWithUTF8String:(const char *) sqlite3_column_text(statement, 2)]autorelease];
NSString *dateField = [[[NSString alloc]initWithUTF8String:(const char *) sqlite3_column_text(statement, 3)]autorelease];
label5.text = ID;
label6.text = nameField;
label7.text = eventField;
label8.text = dateField;
}
sqlite3_finalize(statement);
}
sqlite3_close(self.remindersDB);
}
[cell addSubview:label5];
[cell addSubview:label6];
[cell addSubview:label7];
[cell addSubview:label8];
}
case 2:
{
UILabel *label9 = [[[UILabel alloc]initWithFrame:CGRectMake(26, 3, 30, 40)]autorelease];
label9.backgroundColor = [UIColor clearColor];
label9.textColor = [UIColor whiteColor];
UILabel *label10 = [[[UILabel alloc]initWithFrame:CGRectMake(48, 3, 100, 40)]autorelease];
label10.backgroundColor = [UIColor clearColor];
label10.textColor = [UIColor whiteColor];
UILabel *label11 = [[[UILabel alloc]initWithFrame:CGRectMake(119, 3, 100, 40)]autorelease];
label11.backgroundColor = [UIColor clearColor];
label11.textColor = [UIColor whiteColor];
UILabel *label12 = [[[UILabel alloc]initWithFrame:CGRectMake(198, 3, 120, 40)]autorelease];
label12.backgroundColor = [UIColor clearColor];
label12.textColor = [UIColor whiteColor];
if (sqlite3_open(dbpath, &remindersDB) == SQLITE_OK)
{
NSString *querySQL = [NSString stringWithFormat:@"SELECT * from reminders order by id limit 1 offset 2"];
const char *query_stmt = [querySQL UTF8String];
if (sqlite3_prepare_v2(self.remindersDB ,query_stmt , -1, &statement, NULL) == SQLITE_OK)
{
if (sqlite3_step(statement) == SQLITE_ROW)
{
NSString *ID = [[[NSString alloc] initWithUTF8String:(const char *) sqlite3_column_text(statement, 0)]autorelease];
NSString *nameField = [[[NSString alloc]initWithUTF8String:(const char *) sqlite3_column_text(statement, 1)]autorelease];
NSString *eventField = [[[NSString alloc]initWithUTF8String:(const char *) sqlite3_column_text(statement, 2)]autorelease];
NSString *dateField = [[[NSString alloc]initWithUTF8String:(const char *) sqlite3_column_text(statement, 3)]autorelease];
label9.text = ID;
label10.text = nameField;
label11.text = eventField;
label12.text = dateField;
}
sqlite3_finalize(statement);
}
sqlite3_close(self.remindersDB);
}
[cell addSubview:label9];
[cell addSubview:label10];
[cell addSubview:label11];
[cell addSubview:label12];
}
case 3:
{
UILabel *label13 = [[[UILabel alloc]initWithFrame:CGRectMake(26, 3, 30, 40)]autorelease];
label13.backgroundColor = [UIColor clearColor];
label13.textColor = [UIColor whiteColor];
UILabel *label14 = [[[UILabel alloc]initWithFrame:CGRectMake(45, 3, 100, 40)]autorelease];
label14.backgroundColor = [UIColor clearColor];
label14.textColor = [UIColor whiteColor];
UILabel *label15 = [[[UILabel alloc]initWithFrame:CGRectMake(119, 3, 100, 40)]autorelease];
label15.backgroundColor = [UIColor clearColor];
label15.textColor = [UIColor whiteColor];
UILabel *label16 = [[[UILabel alloc]initWithFrame:CGRectMake(198, 3, 120, 40)]autorelease];
label16.backgroundColor = [UIColor clearColor];
label16.textColor = [UIColor whiteColor];
if (sqlite3_open(dbpath, &remindersDB) == SQLITE_OK)
{
NSString *querySQL = [NSString stringWithFormat:@"SELECT * from reminders order by id limit 1 offset 3"];
const char *query_stmt = [querySQL UTF8String];
if (sqlite3_prepare_v2(self.remindersDB ,query_stmt , -1, &statement, NULL) == SQLITE_OK)
{
if (sqlite3_step(statement) == SQLITE_ROW)
{
NSString *ID = [[[NSString alloc] initWithUTF8String:(const char *) sqlite3_column_text(statement, 0)]autorelease];
NSString *nameField = [[[NSString alloc]initWithUTF8String:(const char *) sqlite3_column_text(statement, 1)]autorelease];
NSString *eventField = [[[NSString alloc]initWithUTF8String:(const char *) sqlite3_column_text(statement, 2)]autorelease];
NSString *dateField = [[[NSString alloc]initWithUTF8String:(const char *) sqlite3_column_text(statement, 3)]autorelease];
label13.text = ID;
label14.text = nameField;
label15.text = eventField;
label16.text = dateField;
}
sqlite3_finalize(statement);
}
sqlite3_close(self.remindersDB);
}
[cell addSubview:label13];
[cell addSubview:label14];
[cell addSubview:label15];
[cell addSubview:label16];
}
我也正在放置屏幕截图，让专家了解问题清晰
1 个答案:
答案 0 :(得分：1)
您正在使用多个sqlite命令从数据库中检索数据。 U应该一次检索所有数据并存储到可变字典和数组中，而不是将其恢复为表格单元格
if（sqlite3_open（dbpath，＆amp; remindersDB）== SQLITE_OK）
{
NSString * querySQL = [NSString stringWithFormat：@“SELECT * from reminders”];
const char * query_stmt = [querySQL UTF8String];
if（sqlite3_prepare_v2（self.remindersDB，query_stmt，-1，＆amp; statement，NULL）== SQLITE_OK） { while（sqlite3_step（compiledStatement）== SQLITE_ROW）
{ NSString * ID = [[[NSString alloc] initWithUTF8String：（const char *）sqlite3_column_text（statement，0）] autorelease];
NSString * nameField = [[[NSString alloc] initWithUTF8String：（const char *）sqlite3_column_text（statement，1）] autorelease];
NSString * eventField = [[[NSString alloc] initWithUTF8String：（const char *）sqlite3_column_text（statement，2）] autorelease];
NSString * dateField = [[[NSString alloc] initWithUTF8String：（const char *）sqlite3_column_text（statement，3）] autorelease];
NSDictionary *dic = [NSDictionary dictionaryWithObjectsAndKeys:ID,@"ID",nameField,@"nameField",………….];
[arrObj addObject:dic]; // arrObj is a mutable arr
}
}
sqlite3_finalize(compiledStatement);
}
} sqlite3_close（数据库）;
相关问题
最新问题
- 我写了这段代码，但我无法理解我的错误
- 我无法从一个代码实例的列表中删除 None 值，但我可以在另一个实例中。为什么它适用于一个细分市场而不适用于另一个细分市场？
- 是否有可能使 loadstring 不可能等于打印？卢阿
- java中的random.expovariate()
- Appscript 通过会议在 Google 日历中发送电子邮件和创建活动
- 为什么我的 Onclick 箭头功能在 React 中不起作用？
- 在此代码中是否有使用“this”的替代方法？
- 在 SQL Server 和 PostgreSQL 上查询，我如何从第一个表获得第二个表的可视化
- 每千个数字得到
- 更新了城市边界 KML 文件的来源？