写一个NSString类的实现

“`”

<pre><code class=""language-objective-c"" lang=""objective-c""> + (id)initWithCString:(c*****t char *)nullTerminatedCString encoding:(NSStringEncoding)encoding;**

+ (id) stringWithCString: (c*****t char*)nullTerminatedCString

encoding: (NSStringEncoding)encoding

{

NSString *obj;

obj = [self allocWithZone: NSDefaultMallocZone()];

obj = [obj initWithCString: nullTerminatedCString encoding: encoding];

return AUTORELEASE(obj);

}
</code></pre>

<pre><code> "“`