public void paintComponent(Graphics g) {
super.paintComponent(g);
我写了一个ListView组件，每行包含一个图像，Image使用uri来获取源代码，但是当我获取错误的图像源时，整个应用程序崩溃了！这很奇怪，因为我使用了＃abcdeee＆＃39;替换item.image.it仍然工作，没有崩溃。 我的代码是
2016-01-06 20:07:21.905 AwsomeProject_17[871:54535] *** Terminating app due to uncaught exception 'NSRangeException', reason: '*** -[__NSCFString substringFromIndex:]: Index 187 out of bounds; string length 186'
*** First throw call stack:
(
0 CoreFoundation 0x000000010936ee65 __exceptionPreprocess + 165
1 libobjc.A.dylib 0x0000000108572deb objc_exception_throw + 48
2 CoreFoundation 0x000000010936ed9d +[NSException raise:format:] + 205
3 Foundation 0x000000010811a11d -[NSString substringFromIndex:] + 126
4 AwsomeProject_17 0x0000000107ea4205 RCTBundlePathForURL + 293
5 AwsomeProject_17 0x0000000107ea428d RCTIsXCAssetURL + 45
6 AwsomeProject_17 0x0000000107ef62e0 -[RCTXCAssetImageLoader canLoadImageURL:] + 48
7 AwsomeProject_17 0x0000000107eed887 -[RCTImageLoader imageURLLoaderForURL:] + 615
8 AwsomeProject_17 0x0000000107eeec80 __87-[RCTImageLoader loadImageWithTag:size:scale:resizeMode:progressBlock:completionBlock:]_block_invoke_2125 + 368
9 libdispatch.dylib 0x000000010c8f1e5d _dispatch_call_block_and_release + 12
10 libdispatch.dylib 0x000000010c91249b _dispatch_client_callout + 8
11 libdispatch.dylib 0x000000010c8f88ec _dispatch_queue_drain + 2215
12 libdispatch.dylib 0x000000010c8f7e0d _dispatch_queue_invoke + 601
13 libdispatch.dylib 0x000000010c8faa56 _dispatch_root_queue_drain + 1420
14 libdispatch.dylib 0x000000010c8fa4c5 _dispatch_worker_thread3 + 111
15 libsystem_pthread.dylib 0x000000010cc4a68f _pthread_wqthread + 1129
16 libsystem_pthread.dylib 0x000000010cc48365 start_wqthread + 13
)
libc++abi.dylib: terminating with uncaught exception of type NSException
(lldb)