Getting selected Lines of tableView
I am working with a tableView and need to get the selected line(s). No problem. But if there is no line selected I want to start working from the 1st line, so I tried to reset my index to 0, but the compiler is not happy with me(again), and is telling me the second "selectedRowIndexes" is unused. Do I just need to make the index mutable or is that just a bandaid?
//get selected lines
NSIndexSet* selectedRowIndexes = [tableView selectedRowIndexes];
if (0 == selectedRowIndexes)//no line selected start at line 0
{
[selectedRowIndexes release];
NSIndexSet* selectedRowIndexes = [NSIndexSet indexSetWithIndexesInRange:NSMakeRange(0, [tableView numberOfRows]- 1)];
}
Thank you very much,
Todd
I worked it out like this:
//get selected lines
NSIndexSet* selectedRowIndexes;
if (0 == [[tableView selectedRowIndexes] count])//no line selected start at line 0
{
NSLog(@"No lines Selected");
selectedRowIndexes = [NSIndexSet indexSetWithIndexesInRange:NSMakeRange(0, [tableView numberOfRows])];
}
else
{
selectedRowIndexes = [tableView selectedRowIndexes];
}
unsigned int numSelectedRows = [selectedRowIndexes count];
unsigned int indexBuffer[numSelectedRows];
unsigned int bufferIndex;
unsigned int indexCount=1;
// more complex but as efficient as you choose your buffersize
NSRange range=NSMakeRange([selectedRowIndexes firstIndex],
[selectedRowIndexes lastIndex]-[selectedRowIndexes firstIndex]+1);
while ((indexCount=[selectedRowIndexes getIndexes:indexBuffer maxCount:numSelectedRows inIndexRange:&range])) {
for (bufferIndex=0;bufferIndex<indexCount;bufferIndex++) {
unsigned int index=indexBuffer[bufferIndex];
// do stuff
DownloadLink *theInfo = [theLinks objectAtIndex: index]; //get the object(s) from selected lines
NSLog(@"The Selected Line = %@",[theInfo downloadName]);
i = [theInfo percentComplete]; //get the status of link
}
}
That worked but THIS was simpler and looks cleaner to me:
//make sure the tableview is not empty
if([theLinks count]==0) return;
NSArray *selectedLinks;
if ([[downloadLinkController selectedObjects] count]==0)//no line selected start at line 0
{
NSLog(@"No lines Selected");
selectedLinks = [NSArray arrayWithObject:[theLinks objectAtIndex:0]]; //get the data from the array
}
else
{
selectedLinks = [downloadLinkController selectedObjects];//get the data from the arraycontroller
}
int i;
for( i = 0; i < [selectedLinks count]; i++ )
{
NSLog(@"Selected Line: %@",[[selectedLinks objectAtIndex:i] linkName]);
//do something cool with the selected line
}
