当我尝试访问uibutton的titleLabel属性时出现奇怪的崩溃（xcode 4.5和IOS sdk 6.0） [英] Strange crash when I try to access to uibutton's titleLabel property (xcode 4.5 and IOS sdk 6.0)

问题描述

当我运行以下代码时，我发现xcode 4.5和sdk 6.0：
的另一个令人讨厌的错误：

I found another annoying bug with xcode 4.5 and sdk 6.0 : when I run the following code :

UIColor *newcolor = [UIColor colorWithCIColor:[CIColor colorWithString:@"1 1 1 1"]];
[button setTitleColor:newcolor forState:UIControlStateNormal];
UILabel *lbl = selectedbutton.titleLabel;

它总是失败并出现错误：

It always fail with the error :

-[UICIColor colorSpaceName]: unrecognized selector sent to instance 0xa9864f0
*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[UICIColor colorSpaceName]: unrecognized selector sent to instance 0xa9864f0'
*** First throw call stack: [...] 
libc++abi.dylib: terminate called throwing an exception

推荐答案

我在使用colorWithCIColor之前找到了一个解决方法：
，我用它复制了它： / p>

I found a workaround : before using my colorWithCIColor, I made a copy of it with :

newcolor = [UIColor colorWithCGColor:newcolor.CGColor];

它解决了崩溃问题。
奇怪，无论如何

and it solves the crash. Strange, anyway

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