在 Instruments 中运行的 iPhone 应用程序因无法识别的选择器而失败
我有一个应用程序，在正常使用中似乎运行没有问题。 Clang Static Analyzer 也没有报告任何问题。 当我尝试在 Instruments 中运行它时，它失败并出现无法识别的选择器异常。
有问题的行是一个简单的属性设置器，其形式为：
self.bar = baz;
为了弄清楚发生了什么，我在其上方添加了一个 NSLog() 调用：
NSLog(@"class = %@ responds = %d", [self class], [self respondsToSelector:@selector(setBar:)]);
self.bar = baz;
在模拟器（没有仪器）和设备上，这准确地显示了我所期望的内容:
class = Foo responds = 1
在 Instruments 下运行时，我得到：
class = Foo responds = 0
我很困惑什么会导致这种情况。 当仪器环境中时，是否可能会占用不同的内存位置？ 谁能建议我如何调试这个？
I have an app that appears to run without problems in normal use. The Clang Static Analyzer reports no problems either. When I try to run it in Instruments, it fails with an unrecognized selector exception.
The offending line is a simple property setter of the form:
self.bar = baz;
To figure out what's going on, I added an NSLog() call immediately above it:
NSLog(@"class = %@ responds = %d", [self class], [self respondsToSelector:@selector(setBar:)]);
self.bar = baz;
On the emulator (without Instruments) and on a device, this shows exactly what I'd expect:
class = Foo responds = 1
When running under Instruments, I get:
class = Foo responds = 0
I'm stumped as to what could cause this. Perhaps a different memory location is getting tromped on when it's in the Instruments environment? Can anyone suggest how I might debug this?
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如果 bar 属于 self，你不能这样做
bar=baz;吗？If bar belongs to self, can't you do
bar=baz;?检查你的财产。
也许你需要巴兹的演员阵容？
Check your properties.
Perhaps to you need a cast on baz?
这里没有足够的信息来了解发生了什么，但是，如果您知道要提供哪些信息，您可能已经修复了它。 所以。 有几件事需要检查：
setBar:方法，您还会收到错误吗？There's not enough information here to know what's going on, but then, if you knew what information to provide you'd probably have already fixed it. So. A few things to check:
selfat various points just for sanity's sakesetBar:method, do you still get the error?