iOS cStringUsingEncoding内存管理问题
浏览数：34 /
时间：2015年06月11日
Hey, I am trying to convert NSString to a C string using cStringUsingEncoding but I have a memory leak. My understanding is that cStringUsingEncoding returns a pointer to a character array that is only guaranteed to exist for the duration of the NSString object. As such you should copy its contents to another string. Here‘s where my problem lies...
I have a function that accepts an NSString and turns it into a C-string copy. Just for testing I ran 1,000 iterations of the following method (to ensure no leaks).
-(void)test{
NSString *test = [[NSString alloc] initWithString:@"Hello world!"];
for(int i=0; i<1000; i++)
{
char *tmp = [self returnCopiedCString:test];
//free memory
free(tmp);
}
[test release];
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