在发布CGPath对象时，我遇到了一个让我完全陷入困境的崩溃。 - (void)drawInContext:(CGContextRef)ctx bounds:(CGRect)bounds类JSCoreTextView方法末尾的CoreTextHyperlinkView库中发生了崩溃。
基本上它使用Core Graphics / Text绘制带下划线的文本。它创建一个路径，绘制它，然后释放它。
以下是相关的堆栈跟踪：
Thread 0 Crashed:
0 CoreFoundation 0x319058b6 _CFArrayGetValueAtIndex + 2
1 MyApp 0x00300891 -[JSCoreTextView drawInContext:bounds:] (JSCoreTextView.m:678)
2 MyApp 0x00300c5f -[JSCoreTextView drawRect:] (JSCoreTextView.m:709)
3 UIKit 0x337ded61 -[UIView(CALayerDelegate) drawLayer:inContext:] + 365
4 QuartzCore 0x3358f315 -[CALayer drawInContext:] + 113
5 QuartzCore 0x3358e8c3 CABackingStoreUpdate_ + 1779
6 QuartzCore 0x3358e037 CA::Layer::display_() + 975
7 QuartzCore 0x335850b7 CA::Layer::display_if_needed(CA::Transaction*) + 203
8 QuartzCore 0x33584fe1 CA::Layer::layout_and_display_if_needed(CA::Transaction*) + 25
9 QuartzCore 0x335849c3 CA::Context::commit_transaction(CA::Transaction*) + 239
10 QuartzCore 0x335847d5 CA::Transaction::commit() + 317
11 QuartzCore 0x33584639 CA::Transaction::observer_callback(__CFRunLoopObserver*, unsigned long, void*) + 61
12 CoreFoundation 0x3199b941 __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 21
13 CoreFoundation 0x31999c39 __CFRunLoopDoObservers + 277
14 CoreFoundation 0x31999f93 __CFRunLoopRun + 747
15 CoreFoundation 0x3190d23d _CFRunLoopRunSpecific + 357
16 CoreFoundation 0x3190d0c9 _CFRunLoopRunInMode + 105
17 GraphicsServices 0x354ec33b _GSEventRunModal + 75
18 UIKit 0x338292b9 _UIApplicationMain + 1121
19 MyApp 0x0003fad7 main (main.m:13)
似乎CGPath内部的一些数组引起了问题。这可能只是iOS中的核心文本或核心图形错误吗？由于我无法查看iOS SDK的源代码，因此我不知道如何进一步调查。
我们只在修改后的BlockAlertView中使用此视图，如下例所示。我们从英语或阿拉伯语中获取JSON API中的文本，其中可能包含要强调和链接的电子邮件地址或URL。
JSCoreTextView *coreTextView = [[JSCoreTextView alloc] initWithFrame:CGRectMake(kAlertViewBorder, _height, frame.size.width-kAlertViewBorder*2, size.height)];
coreTextView.autoresizingMask = UIViewAutoresizingFlexibleWidth;
coreTextView.delegate = self;
coreTextView.text = message;
coreTextView.textColor = _messageColor;
coreTextView.textAlignment = kCTCenterTextAlignment;
coreTextView.fontName = _messageFont.fontName;
coreTextView.fontSize = _messageFont.pointSize;
coreTextView.linkColor = _messageColor;
coreTextView.highlightedLinkColor = _messageLinkColor;
coreTextView.highlightColor = _messageColor;
coreTextView.backgroundColor = UIColor.clearColor;
coreTextView.underlined = YES;
[_view addSubview:coreTextView];