问题描述
嘿.我正在从文件中读取字符串,并尝试使用结果字符串使用KVC方法-setValue:forKeyPath:
在对象上设置BOOL属性.但是,这会中断,但例外:-[NSCFString charValue]: unrecognized selector sent to instance 0x7fff711023b0
.我猜这是因为BOOL是从char类型定义的.有没有解决的办法?谢谢!
Hey. I am reading in a string from a file and attempting to use the resulting string to set a BOOL property on an object using the KVC method -setValue:forKeyPath:
. However, this breaks with an exception: -[NSCFString charValue]: unrecognized selector sent to instance 0x7fff711023b0
. I'm guessing this is because BOOL is typedef'd from char. Is there a way around this? Thanks!
推荐答案
我正在捕获异常,检查它的名称,然后在需要时使用包装的值重试.这是代码:
I am catching the exception, checking it's name, and then retrying with a wrapped value when needed. Here is the code:
@try
{
[(NSObject*)retObj setValue:[[obj keyValuePairs] objectForKey:key]
forKeyPath:key];
}
@catch (NSException * e)
{
if ([[e name] isEqualToString:NSInvalidArgumentException])
{
NSNumber* boolVal = [NSNumber numberWithBool:[[[obj keyValuePairs] objectForKey:key] boolValue]];
[(NSObject*)retObj setValue:boolVal
forKeyPath:key];
}
}
还是谢谢!
这篇关于KVC字符串转换不适用于BOOL值的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!