What you need is an own layout algorithm that takes the text, measuring its size and cuts it until it fits into a single page text view. Then start with the rest of the text, same thing for a next text view and so on... After that (or inside the algorithm) you arrange all the resulting text views on scroll view (or in an array, you later flip through with paging animations - if you like it cheesy). I did a similar thing, but with UILabels, it should also work with textviews. What you need is: NSString's - (CGSize)sizeWithFont:(UIFont *)font constrainedToSize:(CGSize)size and rangeOfString:@" " options:NSBackwardsSearch (looking for word spaces) and substringFromIndex: resp. substringToIndex:
If you need more information, just post a comment.
EDIT:
Hi following code is not tested but contains most of what you need (hopefully), but may hold some bugs, especially when it comes to the recursion... I corrected the BackWardsSearch idea, because it could take a looong time to cut a long text. What I totally ignored - and that could be really tricky - is re-rendering while editing.
But anyway, here's the code.
It's a view controller assumed to old 4 members (header file not posted):
UIView *editableBook;
NSMutableArray *content;
int currentPage;
UIFont *font;
And this is the Controller itself:
//
// EditableBookController.m
//
// Created by Kai on 09.03.11.
//
#import "EditableBookController.h"
@implementation EditableBookController
-(id)initWithText:(NSString *)text
{
if (self=[super init])
{
font = [UIFont fontWithName:@"SomeFont" size:12];
content = [[NSMutableArray alloc]init];
[self cutInPages:text];
currentPage = 0;
}
return self;
}
- (void)loadView
{
self.view = [[UIView alloc] initWithFrame:CGRectMake(.0, .0, 768., 1024.)];//assuming portrait only ...
editableBook = [[UIView alloc]initWithFrame:self.view.bounds];//could be a scroll view in alternate approach
UISwipeGestureRecognizer *flipper = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(nextOrPrevious:)];
[editableBook addGestureRecognizer:flipper];
[flipper release];
[self.view addSubview:editableBook];
UITextView *textView = [[UITextView alloc]initWithText:[content objectAtIndex:currentPage]];
textView.frame = editableBook.bounds;
textView.font = font;
textView.tag = 23;
[editableBook addSubview:textView];
[textView release];
}
-(void)nextOrPrevious:(id)sender
{
UISwipeGestureRecognizer *flipper = (UISwipeGestureRecognizer*)sender;
if(flipper.direction == UISwipeGestureRecognizerDirectionLeft)
{
[self next];
}
else if(flipper.direction == UISwipeGestureRecognizerDirectionRight)
{
[self previous];
}
}
-(void)next
{
if(currentPage == content.count - 1)
{
return;
}
currentPage++;
UIView *fromView = [editableBook viewWithTag:23];
UIView *toView = [[UITextView alloc]initWithText:[content objectAtIndex:currentPage]];
toView.frame = editableBook.bounds;
toView.tag = 23;
[UIView transitionWithView:editableBook duration:0.2 options:UIViewAnimationTransitionFlipFromRight
animations:^
{
[fromView removeFromSuperview];
[editableBook addSubview:toView];
}
completion:NULL];
}
-(void)previous
{
if(currentPage == 0)
{
return;
}
currentPage--;
UIView *fromView = [editableBook viewWithTag:23];
UIView *toView = [[UITextView alloc]initWithText:[content objectAtIndex:currentPage]];
toView.frame = editableBook.bounds;
toView.tag = 23;
[UIView transitionWithView:editableBook duration:0.2 options:UIViewAnimationTransitionFlipFromLeft
animations:^
{
[fromView removeFromSuperview];
[editableBook addSubview:toView];
}
completion:NULL];
}
-(void)cutInPages:(NSString *)text
{
NSRange whereToCut = whereToCut = [text rangeOfString:@" "];
NSString *pageText = [text substringToIndex:whereToCut.location];
NSString *rest = [text substringFromIndex:whereToCut.location];;
CGFloat height = 0;
while (height<1024.)
{
NSRange whereToCut = [rest rangeOfString:@" "];
NSString *wordOfRest = [rest substringToIndex:whereToCut.location];
pageText = [NSString stringWithFormat:@"%@%@", pageText, wordOfRest];
rest = [rest substringFromIndex:whereToCut.location];;
CGSize size = [pageText sizeWithFont:font
constrainedToSize:CGSizeMake(768., 10000)
lineBreakMode:UILineBreakModeWordWrap];
height = size.height;
}
if(height>1024.)
{
//TODO cut the last word of pageText and prepend to the eest
}
[content addObject:pageText];
if([rest length] > 0)
{
[self cutInPages:rest];
}
}
- (void)dealloc
{
[editableBook release];
[content release];
[super dealloc];
}
@end
