iOS 7 UITextView中的换行符打破了Text Kit排除区域换行

Question

我正在使用iOS 7中的Text Kit,我在NSTextContainer禁区附近发现了很多奇怪的东西.

我有两种观点:a UITextView和简单的可拖动UIView; 作为UIView移动,我从UIView框架创建了一条bezier路径(调整到UITextView坐标空间内)并更新了UITextViews NSTextContainer的exclusionPaths数组 - 非常简单.

在第一个屏幕截图中,您可以看到Text Kit很好地将文本包装在矩形排除区域周围:

但是,当用户在其中引入换行符时UITextView,TextKit似乎认为禁区的垂直区域要大得多 - 看起来与换行符创建的空格一样高.bezier路径完全相同,所以这似乎是一个Text Kit问题(除非我做错了).

码:

ViewController.h:

@interface ViewController : UIViewController<UITextViewDelegate>

@property (nonatomic, strong) IBOutlet UITextView *textView;
@property (nonatomic, strong) IBOutlet UIView *dragView;

@end

ViewController.m:

-(void)viewDidLoad
{
    [super viewDidLoad];

    UIPanGestureRecognizer *panRecognizer = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(move:)];
    [panRecognizer setMinimumNumberOfTouches:1];
    [panRecognizer setMaximumNumberOfTouches:1];
    [self.dragView addGestureRecognizer:panRecognizer];

    [self updateExclusionZone];
}

-(void)move:(UIPanGestureRecognizer *)pan
{
    [self.view bringSubviewToFront:[pan view]];

    if ([pan state] == UIGestureRecognizerStateBegan) {
        NSLog(@"pan began");
    }

    self.dragView.center = [pan locationInView:self.view];
    [self updateExclusionZone];

    if ([pan state] == UIGestureRecognizerStateEnded) {
        NSLog(@"pan ended");
    }
}

-(void)updateExclusionZone
{
    CGRect dragViewFrame = self.dragView.frame;
    CGRect exclusionRect = [self.view convertRect:dragViewFrame toView:self.textView];

    UIBezierPath *exclusion = [UIBezierPath bezierPathWithRect:exclusionRect];

    self.textView.textContainer.exclusionPaths = @[exclusion];
}

有什么想法吗？

Answer 1

我今天遇到了同样的问题.

如果你同时设置editable,这个错误似乎就出现selectable了.如果仅选择一个或否,则按预期呈现.两者都默认选中.

如果您需要两个选项,只需在代码中设置它们即可.

_textView.textContainer.exclusionPaths = exclusionPaths;
_textView.attributedText = attrString;
_textView.editable = YES;
_textView.selectable = YES;