Find out when all processes in (void) is done?
- by Emil
Hey.
I need to know how you can find out when all processes (loaded) from a - (void) are done, if it's possible.
Why? I'm loading in data for a UITableView, and I need to know when a Loading... view can be replaced with the UITableView, and when I can start creating the cells.
This is my code:
- (void) reloadData {
NSAutoreleasePool *releasePool = [[NSAutoreleasePool alloc] init];
NSLog(@"Reloading data.");
NSURL *urlPosts = [NSURL URLWithString:[NSString stringWithFormat:@"%@", URL]];
NSError *lookupError = nil;
NSString *data = [[NSString alloc] initWithContentsOfURL:urlPosts encoding:NSUTF8StringEncoding error:&lookupError];
postsData = [data componentsSeparatedByString:@"~"];
[data release], data = nil;
urlPosts = nil;
self.numberOfPosts = [[postsData objectAtIndex:0] intValue];
self.postsArrayID = [[postsData objectAtIndex:1] componentsSeparatedByString:@"#"];
self.postsArrayDate = [[postsData objectAtIndex:2] componentsSeparatedByString:@"#"];
self.postsArrayTitle = [[postsData objectAtIndex:3] componentsSeparatedByString:@"#"];
self.postsArrayComments = [[postsData objectAtIndex:4] componentsSeparatedByString:@"#"];
self.postsArrayImgSrc = [[postsData objectAtIndex:5] componentsSeparatedByString:@"#"];
NSMutableArray *writeToPlist = [NSMutableArray array];
NSMutableArray *writeToNoImagePlist = [NSMutableArray array];
NSMutableArray *imagesStored = [NSMutableArray arrayWithContentsOfFile:[rootPath stringByAppendingPathComponent:@"imagesStored.plist"]];
int loop = 0;
for (NSString *postID in postsArrayID) {
if ([imagesStored containsObject:[NSString stringWithFormat:@"%@.png", postID]]){
NSLog(@"Allready stored, jump to next. ID: %@", postID);
continue;
}
NSLog(@"%@.png", postID);
NSData *imageData = [NSData dataWithContentsOfURL:[NSURL URLWithString:[postsArrayImgSrc objectAtIndex:loop]]];
// If image contains anything, set cellImage to image. If image is empty, try one more time or use noImage.png, set in IB
if (imageData == nil){
NSLog(@"imageData is empty before trying .jpeg");
// If image == nil, try to replace .jpg with .jpeg, and if that worked, set cellImage to that image. If that is also nil, use noImage.png, set in IB.
imageData = [NSData dataWithContentsOfURL:[NSURL URLWithString:[[postsArrayImgSrc objectAtIndex:loop] stringByReplacingOccurrencesOfString:@".jpg" withString:@".jpeg"]]];
}
if (imageData != nil){
NSLog(@"imageData is NOT empty when creating file");
[fileManager createFileAtPath:[rootPath stringByAppendingPathComponent:[NSString stringWithFormat:@"images/%@.png", postID]] contents:imageData attributes:nil];
[writeToPlist addObject:[NSString stringWithFormat:@"%@.png", postID]];
} else {
[writeToNoImagePlist addObject:[NSString stringWithFormat:@"%@", postID]];
}
imageData = nil;
loop++;
NSLog(@"imagePlist: %@\nnoImagePlist: %@", writeToPlist, writeToNoImagePlist);
}
NSMutableArray *writeToAllPlist = [NSMutableArray arrayWithArray:writeToPlist];
[writeToPlist addObjectsFromArray:[NSArray arrayWithContentsOfFile:nowPlist]];
[writeToAllPlist addObjectsFromArray:[NSArray arrayWithContentsOfFile:[rootPath stringByAppendingPathComponent:@"imagesStored.plist"]]];
[writeToNoImagePlist addObjectsFromArray:[NSArray arrayWithContentsOfFile:[rootPath stringByAppendingPathComponent:@"noImage.plist"]]];
[writeToPlist writeToFile:nowPlist atomically:YES];
[writeToAllPlist writeToFile:[rootPath stringByAppendingPathComponent:@"imagesStored.plist"] atomically:YES];
[writeToNoImagePlist writeToFile:[rootPath stringByAppendingPathComponent:@"noImage.plist"] atomically:YES];
[releasePool release];
}
