我正在创建一个App，其中包含UITableView中的项目列表，该列表从数组中获取其数据。这些项目很好地加载到列表中，但是它们没有按照我在loadAnnotations方法中的方式进行排序（继续阅读）。
下面是加载我的注释的代码（这是我在列表中显示的内容），以及用于将我的UITable中的单元格文本设置为注释名称的代码。
所有内容都很好地加载到我的列表中，但排序是随机的。有什么想法吗？
-(void) loadOutAnnotations
{
CLLocationCoordinate2D workingCoordinate;
//***********HOTELS**************************
workingCoordinate.latitude = 40.763856;
workingCoordinate.longitude = -73.973034;
iCodeBlogAnnotation *hotel1 = [[iCodeBlogAnnotation alloc] initWithCoordinate:workingCoordinate];
[hotel1 setTitle:@"Hotel 1"];
[hotel1 setSubtitle:@"This is Hotel #1"];
[hotel1 setAnnotationType:iCodeBlogAnnotationTypeHotels];
[mapView addAnnotation:hotel1];
workingCoordinate.latitude = 50.763856;
workingCoordinate.longitude = -83.973034;
iCodeBlogAnnotation *hotel2 = [[iCodeBlogAnnotation alloc] initWithCoordinate:workingCoordinate];
[hotel2 setTitle:@"Hotel 2"];
[hotel2 setSubtitle:@"This is Hotel #2"];
[hotel2 setAnnotationType:iCodeBlogAnnotationTypeHotels];
[mapView addAnnotation:hotel2];
workingCoordinate.latitude = 60.763856;
workingCoordinate.longitude = -93.973034;
iCodeBlogAnnotation *hotel3 = [[iCodeBlogAnnotation alloc] initWithCoordinate:workingCoordinate];
[hotel3 setTitle:@"Hotel 3"];
[hotel3 setSubtitle:@"This is Hotel #3"];
[hotel3 setAnnotationType:iCodeBlogAnnotationTypeHotels];
[mapView addAnnotation:hotel3];
workingCoordinate.latitude = 10.763856;
workingCoordinate.longitude = -23.973034;
iCodeBlogAnnotation *hotel4 = [[iCodeBlogAnnotation alloc] initWithCoordinate:workingCoordinate];
[hotel4 setTitle:@"Hotel 4"];
[hotel4 setSubtitle:@"This is Hotel #4"];
[hotel4 setAnnotationType:iCodeBlogAnnotationTypeHotels];
[mapView addAnnotation:hotel4];
workingCoordinate.latitude = 30.763856;
workingCoordinate.longitude = -43.973034;
iCodeBlogAnnotation *hotel5 = [[iCodeBlogAnnotation alloc] initWithCoordinate:workingCoordinate];
[hotel5 setTitle:@"Hotel 5"];
[hotel5 setSubtitle:@"This is Hotel #5"];
[hotel5 setAnnotationType:iCodeBlogAnnotationTypeHotels];
[mapView addAnnotation:hotel5];
// *****************AERIALS*****************************
workingCoordinate.latitude = 25.763856;
workingCoordinate.longitude = -15.973034;
iCodeBlogAnnotation *aerial1 = [[iCodeBlogAnnotation alloc] initWithCoordinate:workingCoordinate];
[aerial1 setTitle:@"Aerial 1"];
[aerial1 setSubtitle:@"This is Aerial #1"];
[aerial1 setAnnotationType:iCodeBlogAnnotationTypeAerialShots];
[mapView addAnnotation:aerial1];
workingCoordinate.latitude = 35.763856;
workingCoordinate.longitude = -25.973034;
iCodeBlogAnnotation *aerial2 = [[iCodeBlogAnnotation alloc] initWithCoordinate:workingCoordinate];
[aerial2 setTitle:@"Aerial 2"];
[aerial2 setSubtitle:@"This is Aerial #2"];
[aerial2 setAnnotationType:iCodeBlogAnnotationTypeAerialShots];
[mapView addAnnotation:aerial2];
workingCoordinate.latitude = 45.763856;
workingCoordinate.longitude = -35.973034;
iCodeBlogAnnotation *aerial3 = [[iCodeBlogAnnotation alloc] initWithCoordinate:workingCoordinate];
[aerial3 setTitle:@"Aerial 3"];
[aerial3 setSubtitle:@"This is Aerial #3"];
[aerial3 setAnnotationType:iCodeBlogAnnotationTypeAerialShots];
[mapView addAnnotation:aerial3];
workingCoordinate.latitude = 55.763856;
workingCoordinate.longitude = -45.973034;
iCodeBlogAnnotation *aerial4 = [[iCodeBlogAnnotation alloc] initWithCoordinate:workingCoordinate];
[aerial4 setTitle:@"Aerial 4"];
[aerial4 setSubtitle:@"This is Aerial #4"];
[aerial4 setAnnotationType:iCodeBlogAnnotationTypeAerialShots];
[mapView addAnnotation:aerial4];
workingCoordinate.latitude = 65.763856;
workingCoordinate.longitude = -55.973034;
iCodeBlogAnnotation *aerial5 = [[iCodeBlogAnnotation alloc] initWithCoordinate:workingCoordinate];
[aerial5 setTitle:@"Aerial 5"];
[aerial5 setSubtitle:@"This is Aerial #5"];
[aerial5 setAnnotationType:iCodeBlogAnnotationTypeAerialShots];
[mapView addAnnotation:aerial5];
// *****************STREETS*****************************
workingCoordinate.latitude = 27.763856;
workingCoordinate.longitude = -37.973034;
iCodeBlogAnnotation *street1 = [[iCodeBlogAnnotation alloc] initWithCoordinate:workingCoordinate];
[street1 setTitle:@"Street 1"];
[street1 setSubtitle:@"This is Street #1"];
[street1 setAnnotationType:iCodeBlogAnnotationTypeStreets];
[mapView addAnnotation:street1];
workingCoordinate.latitude = 37.763856;
workingCoordinate.longitude = -47.973034;
iCodeBlogAnnotation *street2 = [[iCodeBlogAnnotation alloc] initWithCoordinate:workingCoordinate];
[street2 setTitle:@"Street 2"];
[street2 setSubtitle:@"This is Street #2"];
[street2 setAnnotationType:iCodeBlogAnnotationTypeStreets];
[mapView addAnnotation:street2];
workingCoordinate.latitude = 57.763856;
workingCoordinate.longitude = -67.973034;
iCodeBlogAnnotation *street3 = [[iCodeBlogAnnotation alloc] initWithCoordinate:workingCoordinate];
[street3 setTitle:@"Street 3"];
[street3 setSubtitle:@"This is Street #3"];
[street3 setAnnotationType:iCodeBlogAnnotationTypeStreets];
[mapView addAnnotation:street3];
workingCoordinate.latitude = 77.763856;
workingCoordinate.longitude = -87.973034;
iCodeBlogAnnotation *street4 = [[iCodeBlogAnnotation alloc] initWithCoordinate:workingCoordinate];
[street4 setTitle:@"Street 4"];
[street4 setSubtitle:@"This is Street #4"];
[street4 setAnnotationType:iCodeBlogAnnotationTypeStreets];
[mapView addAnnotation:street4];
workingCoordinate.latitude = 87.763856;
workingCoordinate.longitude = -97.973034;
iCodeBlogAnnotation *street5 = [[iCodeBlogAnnotation alloc] initWithCoordinate:workingCoordinate];
[street5 setTitle:@"Street 5"];
[street5 setSubtitle:@"This is Street #5"];
[street5 setAnnotationType:iCodeBlogAnnotationTypeStreets];
[mapView addAnnotation:street5];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = @"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil)
{
cell = [[[UITableViewCell alloc] initWithStyle:(UITableViewCellStyleDefault) reuseIdentifier:CellIdentifier]autorelease];
}
// here we are creating an array object BUT it is empty (it has no object in it)
NSMutableArray *annotations = [[NSMutableArray alloc] init];
if(indexPath.section == 0)
{
for(iCodeBlogAnnotation *annotation in [mapView annotations])
{
if([annotation annotationType] == iCodeBlogAnnotationTypeHotels)
{
// here is the line where we actually add objects to the array
[annotations addObject:annotation];
}
}
if ([annotations count] > indexPath.row)
{
cell.textLabel.text = [[annotations objectAtIndex:indexPath.row] title];
}
else
{
cell.textLabel.text = @"Empty";
}
}
else if (indexPath.section == 1)
{
for(iCodeBlogAnnotation *annotation in [mapView annotations])
{
if([annotation annotationType] == iCodeBlogAnnotationTypeAerialShots)
{
[annotations addObject:annotation];
}
}
if ([annotations count] > indexPath.row)
{
cell.textLabel.text = [[annotations objectAtIndex:indexPath.row] title];
}
else
{
cell.textLabel.text = @"Empty";
}
}
else if (indexPath.section == 2)
{
for(iCodeBlogAnnotation *annotation in [mapView annotations])
{
if([annotation annotationType] == iCodeBlogAnnotationTypeStreets)
{
[annotations addObject:annotation];
}
}
if ([annotations count] > indexPath.row)
{
cell.textLabel.text = [[annotations objectAtIndex:indexPath.row] title];
}
else
{
cell.textLabel.text = @"Empty";
}
}
return cell;
}
答案 0 :(得分：0)
我认为最好使用sortedArrayUsingDescriptors：或其他NSArray排序方法之一在cellForRowAtIndexPath之外创建数组。
NSSortDescriptor *sorter = [NSSortDescriptor descriptorWithKey:@"aKey" ascending:YES];
NSArray *sortedArray = [[mapView annotations] sortedArrayUsingDescriptors:@[sorter]];
使用你需要的任何键代替@“aKey”来获得你想要的排序，然后使用sortedArray，以通常的方式填充表格。
答案 1 :(得分：0)
为每个部分创建MapView：
酒店地图，天线地图，街道地图（或每个部分保持MapView的大小#sections的数组）
将您的注释添加到适当的位置/部分。
tableView:cellForRowAtIndexPath:的应如下所示：
- (UITableViewCell *)tableView:(UITableView *)tableView
cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = @"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil)
{
cell = [[UITableViewCell alloc] initWithStyle:(UITableViewCellStyleDefault)
reuseIdentifier:CellIdentifier];
}
//_maps is a mutable array of MapView's
MapView* map = (indexPath.section < [_maps count] ? _maps[indexPath.section] : nil);
NSString* text = (map && indexPath.row < [[map annotations] count] ? [[[map annotations] objectAtIndex:indexPath.row] title] : @"Empty");
cell.textLabel.text = text;
return cell;
}