I have a very very long text, so instead of using UITextView, I want to truncate the text to small chunks that can fit to a label with width and height 300, 400, and based on number of chunks, I want to create UILabel dynamically and populate them with these chunks.
I have written a method but it seems doesn't return the actual strings that can fit. it returns shorter strings.
am I missing something? is there anyway I can do this?
- (NSArray *)truncate:(NSString *)text
{
NSMutableArray *textChunks = [[NSMutableArray alloc] init];
NSString *chunk = [[NSString alloc] init];
CTFramesetterRef frameSetter;
UIFont *uiFont = [UIFont systemFontOfSize:17.0f];
CTFontRef ctFont = CTFontCreateWithName((__bridge CFStringRef)uiFont.fontName, uiFont.pointSize, NULL);
NSDictionary *attr = [NSDictionary dictionaryWithObject:(__bridge id)ctFont forKey:(id)kCTFontAttributeName];
NSMutableAttributedString *attrString = [[NSMutableAttributedString alloc] initWithString:text attributes:attr];
CFRange fitRange;
while (attrString.length>0) {
frameSetter = CTFramesetterCreateWithAttributedString ((__bridge CFAttributedStringRef) attrString);
CGSize framSize = CTFramesetterSuggestFrameSizeWithConstraints(frameSetter, CFRangeMake(0,0), NULL, CGSizeMake(myLabel.frame.size.width, myLabel.frame.size.height), &fitRange);
NSLog(@"height: %f", framSize.height);
CFRelease(frameSetter);
chunk = [[attrString attributedSubstringFromRange:NSMakeRange(0, fitRange.length)] string];
[textChunks addObject:chunk];
[attrString setAttributedString: [attrString attributedSubstringFromRange:NSMakeRange(fitRange.length, attrString.string.length-fitRange.length)]];
}
return textChunks;
}
