我遇到了核心文字框架的问题。我的目标是在 UIView 中显示多列。在纵向模式中，我想显示3列和横向模式，我想要显示4列。所以一切都很好。 当它改变方向需要时间来重绘自定义视图。 在我的自定义视图中，我使用核心文本类做了一些事情，之后我的方向受到了打击。
在我的视图控制器
中override func viewWillLayoutSubviews() {
self.rotated()
}
func rotated() {
let orientation: UIInterfaceOrientation = UIApplication.shared.statusBarOrientation
if orientation.isLandscape {
if self.multiPageTextView.text != nil {
self.view.layoutIfNeeded()
self.multiPageTextView.columnCount = 4
}
}else{
if self.multiPageTextView.text != nil {
self.multiPageTextView.columnCount = 3
self.multiPageTextView .setNeedsDisplay()
self.multiPageTextView.layoutIfNeeded()
}
}
}
我的 customview drawrect 方法
- (void)drawRect:(CGRect)rect
{
self.headlineLabel = [[UILabel alloc]init];
self.headlineLabel.frame = CGRectMake(10, 0, self.frame.size.width - 20, 25);
self.abstractLabel = [[UILabel alloc]init];
self.abstractLabel.frame = CGRectMake(10, 0, self.frame.size.width - 20, 25);
[self.pages makeObjectsPerformSelector:@selector(removeFromSuperview)];
[self.pages removeAllObjects];
CGRect pageControlFrame = CGRectMake(0.0, self.frame.size.height - 20.0, self.frame.size.width, 20.0);
self.pageControl.frame = pageControlFrame;
self.headlineLabel.numberOfLines = 0;
self.headlineLabel.lineBreakMode = NSLineBreakByWordWrapping;
UIFont *titleFont = [UIFont fontWithName:@"TAUN_Elango_Abirami" size:self.titleFontSize];
self.headlineLabel.font = titleFont;
// self.headlineLabel.backgroundColor = [UIColor greenColor];
self.headlineLabel.text = _titleText;
CGRect headLineLbleFrame = CGRectMake(10, 0, self.frame.size.width - 20.0, [self getLabelHeight:self.headlineLabel]);
self.headlineLabel.frame = headLineLbleFrame;
self.abstractLabel.numberOfLines = 0;
self.abstractLabel.lineBreakMode = NSLineBreakByWordWrapping;
UIFont *abstractFont = [UIFont fontWithName:@"TAUN_Elango_Abirami" size:self.abstractFontSize];
self.abstractLabel.font =abstractFont;
self.abstractLabel.text = _abstractText;
CGRect abstractLbleFrame = CGRectMake(10, headLineLbleFrame.size.height + 5, self.frame.size.width - 20, [self getLabelHeight:self.abstractLabel]);
self.abstractLabel.frame = abstractLbleFrame;
NSInteger currentPosition = 0;
NSInteger iteration = 0;
CGFloat contentSizeX = 0;
CGFloat contentSizeY = 0;
BOOL moreTextAvailable = YES;
do
{
CGRect currentFrame = CGRectOffset(self.scrollView.frame, self.scrollView.frame.size.width * iteration, 0.0);
AKOMultiColumnTextView *view = [[AKOMultiColumnTextView alloc] initWithFrame:currentFrame];
[view setPage:iteration];
view.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
if (iteration == 0) {
[view addSubview:self.headlineLabel];
[view addSubview:self.abstractLabel];
}
view.startingPoint = self.headlineLabel.frame.size.height + self.abstractLabel.frame.size.height + 10;
view.columnCount = self.columnCount;
view.startIndex = currentPosition;
view.fontSize = self.fontSize;
view.text = self.text;
view.font = self.font;
view.color = self.color;
view.backgroundColor = self.backgroundColor;
// set the properties
view.lineBreakMode = _lineBreakMode;
view.textAlignment = _textAlignment;
view.firstLineHeadIndent = _firstLineHeadIndent;
view.spacing = _spacing;
view.topSpacing = _topSpacing;
view.lineSpacing = _lineSpacing;
view.columnInset = _columnInset;
view.dataSource = self.dataSource;
[self.pages addObject:view];
[self.scrollView addSubview:view];
currentPosition = view.finalIndex;
iteration += 1;
view.scrollView = self.scrollView;
contentSizeX = currentFrame.size.width * iteration;
contentSizeY = currentFrame.size.height;
moreTextAvailable = view.moreTextAvailable;
// self.pageControl.currentPage = 0;
}
while (moreTextAvailable);
self.pageControl.numberOfPages = iteration;
if(iteration == self.pages.count){
if ([self.dataSource respondsToSelector:@selector(stopLoading:)]){
[self.dataSource stopLoading:111];
}
if ([self.dataSource respondsToSelector:@selector(getTotalPage:)]){
[self.dataSource getTotalPage:iteration];
}
}
if (self.columnText == nil || self.columnText.length == 0 || [self.columnText isEqualToString:@""]){
self.columnText = @"0";
}
NSInteger tempInt = [self.columnText integerValue];
self.pageControl.currentPage = tempInt;
if (isSwipedEnd) {
[self.scrollView setContentOffset:CGPointMake(0, 0)];
self.scrollView.contentSize = CGSizeMake(contentSizeX + 5, contentSizeY);
}else{
lastXvalue = self.frame.size.width * tempInt;
CGPoint point = CGPointMake(lastXvalue, 0);
lastXvalue = 0;
self.scrollView.contentSize = CGSizeMake(contentSizeX + 5, contentSizeY);
self.scrollView.contentOffset = point;
}
}
在这里我如何实现任务跟随任务 1.我怎么知道方向已经完成 2.重绘自定义视图的正确方法是什么？
绘制列的源代码 https://github.com/akosma/CoreTextWrapper
我正在使用桥接标头来访问objective-c类文件 在此先感谢!!