objective-c – iOS 7中的换行符UITextView打破Text Kit禁用区域换行

我在iOS 7中使用Text Kit,我发现NSTextContainer排除区域有很多奇怪之处.

@L_874_0@两个视图：一个UITextView和一个简单的可拖动的UIView;当UIView移动时,我从UIView的框架创建了一条bezier路径(调整到UITextView的坐标空间内),我更新了UITextView的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UITextView中引入换行符时,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？

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