How-To – short version<\/h2>\n\n- Add a tableview<\/li>\n
- create a scrollview with an imageview which size and contentSize is the same as the tableview<\/li>\n
- add the scrollview as a background view of the tableview<\/li>\n
- set the tableview to transparent<\/li>\n
- Good To Know: the TableView is a ScrollView so you can handle all ScrollViewDelegate related methods. Just simply implement the ScrollView delegate methods where you implemented the TableViewDelegate methods: catch the tableview’s scrolling event and position the scroll position of the background scrollview accordingly<\/li>\n<\/ol>\n
How-To – detailed version<\/h2>\n<\/div>\nThe sample source uses ARC.<\/div>\nFirst, in the ViewDidLoad<\/em> of your ViewController<\/em> load the appropriate image, create an image view which presents it \u00a0and add the ImageView as the subview of your ScrollView:<\/p>\n- (UIView *)createBackgroundScrollViewWithFrame:(CGRect)tableViewFrame {\n\n \/\/ set up the image view, select a long image\n UIImage *img = [UIImage imageNamed:kImageName];\n\n \/\/ create image view with the image, the size should be long enough for the scroll\n UIImageView *imgView = [[UIImageView alloc] initWithImage:img];\n imgView.contentMode = UIViewContentModeScaleToFill;\n imgView.frame = CGRectMake(0,0, tableViewFrame.size.width, img.size.height);\n\n \/\/ set up the background scroll view and add the image view\n UIScrollView *backgroundScrollView = [[UIScrollView alloc] initWithFrame:tableViewFrame];\n backgroundScrollView.userInteractionEnabled = NO;\n backgroundScrollView.contentSize = imgView.frame.size;\n [backgroundScrollView addSubview:imgView];\n\n return backgroundScrollView;\n}<\/pre>\n <\/p>\n
Second, set the ScrollView as the backgroundView of your tableView:<\/p>\n
\/\/ set the scroll view as the background view of the tableview\n myTableView.backgroundView = [self createBackgroundScrollViewWithFrame:theTableView.bounds];<\/pre>\nThird, don’t forget to set the background color of the cells to clearColor if you use the tableView in grouped mode:<\/p>\n
cell.backgroundColor = [UIColor clearColor];<\/pre>\nFourth implement the appropriate ScrollViewDelegate method of the TableView (scrollViewDidScroll). Notice that I modified the parameter to UITableView instead of UIScrollView. This is not necessary but makes to code more clear and you don’t have to cast a lot. We should calculate the correct position by the proportion of the contentSize of the TableView and the ScrollView.<\/p>\n
\/\/ cheat a bit: modify the parameter to UITableView from UIScrollView\n- (void)scrollViewDidScroll:(UITableView *)aTableview {\n\n if (aTableview != myTableView) {\n return;\n }\n UIScrollView *backgroundScrollView = (UIScrollView*)aTableview.backgroundView;\n\n \/\/ calculate the position of the scroll regarding to the position of the tableview\n float diffTableView = aTableview.contentSize.height - aTableview.frame.size.height;\n if (diffTableView>0) {\n float diffScroll = backgroundScrollView.contentSize.height - backgroundScrollView.frame.size.height;\n float newOffset = aTableview.contentOffset.y * (diffScroll\/diffTableView);\n\n backgroundScrollView.contentOffset = CGPointMake(backgroundScrollView.contentOffset.x, newOffset);\n }\n}<\/pre>\n <\/p>\n
Notes:\u00a0The image should be long enough to see the correct effect.<\/p>\n
If you put a frame around your content you should play with margins and spacings: \u00a0you have to set up a header and footer and indent of each cell.<\/p>\n
How-To – detailed version<\/h2>\n<\/div>\nThe sample source uses ARC.<\/div>\nFirst, in the ViewDidLoad<\/em> of your ViewController<\/em> load the appropriate image, create an image view which presents it \u00a0and add the ImageView as the subview of your ScrollView:<\/p>\n- (UIView *)createBackgroundScrollViewWithFrame:(CGRect)tableViewFrame {\n\n \/\/ set up the image view, select a long image\n UIImage *img = [UIImage imageNamed:kImageName];\n\n \/\/ create image view with the image, the size should be long enough for the scroll\n UIImageView *imgView = [[UIImageView alloc] initWithImage:img];\n imgView.contentMode = UIViewContentModeScaleToFill;\n imgView.frame = CGRectMake(0,0, tableViewFrame.size.width, img.size.height);\n\n \/\/ set up the background scroll view and add the image view\n UIScrollView *backgroundScrollView = [[UIScrollView alloc] initWithFrame:tableViewFrame];\n backgroundScrollView.userInteractionEnabled = NO;\n backgroundScrollView.contentSize = imgView.frame.size;\n [backgroundScrollView addSubview:imgView];\n\n return backgroundScrollView;\n}<\/pre>\n <\/p>\n
Second, set the ScrollView as the backgroundView of your tableView:<\/p>\n
\/\/ set the scroll view as the background view of the tableview\n myTableView.backgroundView = [self createBackgroundScrollViewWithFrame:theTableView.bounds];<\/pre>\nThird, don’t forget to set the background color of the cells to clearColor if you use the tableView in grouped mode:<\/p>\n
cell.backgroundColor = [UIColor clearColor];<\/pre>\nFourth implement the appropriate ScrollViewDelegate method of the TableView (scrollViewDidScroll). Notice that I modified the parameter to UITableView instead of UIScrollView. This is not necessary but makes to code more clear and you don’t have to cast a lot. We should calculate the correct position by the proportion of the contentSize of the TableView and the ScrollView.<\/p>\n
\/\/ cheat a bit: modify the parameter to UITableView from UIScrollView\n- (void)scrollViewDidScroll:(UITableView *)aTableview {\n\n if (aTableview != myTableView) {\n return;\n }\n UIScrollView *backgroundScrollView = (UIScrollView*)aTableview.backgroundView;\n\n \/\/ calculate the position of the scroll regarding to the position of the tableview\n float diffTableView = aTableview.contentSize.height - aTableview.frame.size.height;\n if (diffTableView>0) {\n float diffScroll = backgroundScrollView.contentSize.height - backgroundScrollView.frame.size.height;\n float newOffset = aTableview.contentOffset.y * (diffScroll\/diffTableView);\n\n backgroundScrollView.contentOffset = CGPointMake(backgroundScrollView.contentOffset.x, newOffset);\n }\n}<\/pre>\n <\/p>\n
Notes:\u00a0The image should be long enough to see the correct effect.<\/p>\n
If you put a frame around your content you should play with margins and spacings: \u00a0you have to set up a header and footer and indent of each cell.<\/p>\n
First, in the ViewDidLoad<\/em> of your ViewController<\/em> load the appropriate image, create an image view which presents it \u00a0and add the ImageView as the subview of your ScrollView:<\/p>\n <\/p>\n Second, set the ScrollView as the backgroundView of your tableView:<\/p>\n Third, don’t forget to set the background color of the cells to clearColor if you use the tableView in grouped mode:<\/p>\n Fourth implement the appropriate ScrollViewDelegate method of the TableView (scrollViewDidScroll). Notice that I modified the parameter to UITableView instead of UIScrollView. This is not necessary but makes to code more clear and you don’t have to cast a lot. We should calculate the correct position by the proportion of the contentSize of the TableView and the ScrollView.<\/p>\n <\/p>\n Notes:\u00a0The image should be long enough to see the correct effect.<\/p>\n If you put a frame around your content you should play with margins and spacings: \u00a0you have to set up a header and footer and indent of each cell.<\/p>\n- (UIView *)createBackgroundScrollViewWithFrame:(CGRect)tableViewFrame {\n\n \/\/ set up the image view, select a long image\n UIImage *img = [UIImage imageNamed:kImageName];\n\n \/\/ create image view with the image, the size should be long enough for the scroll\n UIImageView *imgView = [[UIImageView alloc] initWithImage:img];\n imgView.contentMode = UIViewContentModeScaleToFill;\n imgView.frame = CGRectMake(0,0, tableViewFrame.size.width, img.size.height);\n\n \/\/ set up the background scroll view and add the image view\n UIScrollView *backgroundScrollView = [[UIScrollView alloc] initWithFrame:tableViewFrame];\n backgroundScrollView.userInteractionEnabled = NO;\n backgroundScrollView.contentSize = imgView.frame.size;\n [backgroundScrollView addSubview:imgView];\n\n return backgroundScrollView;\n}<\/pre>\n \/\/ set the scroll view as the background view of the tableview\n myTableView.backgroundView = [self createBackgroundScrollViewWithFrame:theTableView.bounds];<\/pre>\n
cell.backgroundColor = [UIColor clearColor];<\/pre>\n
\/\/ cheat a bit: modify the parameter to UITableView from UIScrollView\n- (void)scrollViewDidScroll:(UITableView *)aTableview {\n\n if (aTableview != myTableView) {\n return;\n }\n UIScrollView *backgroundScrollView = (UIScrollView*)aTableview.backgroundView;\n\n \/\/ calculate the position of the scroll regarding to the position of the tableview\n float diffTableView = aTableview.contentSize.height - aTableview.frame.size.height;\n if (diffTableView>0) {\n float diffScroll = backgroundScrollView.contentSize.height - backgroundScrollView.frame.size.height;\n float newOffset = aTableview.contentOffset.y * (diffScroll\/diffTableView);\n\n backgroundScrollView.contentOffset = CGPointMake(backgroundScrollView.contentOffset.x, newOffset);\n }\n}<\/pre>\n
![\"\"](\"http:\/\/andras.palfi.hu\/wp-content\/uploads\/2012\/07\/usingFrame.png\" "\\"usingFrame\\"")
<\/a><\/p>\n