我正在尝试回答另一个关于==操作符的问题,我创建了这段代码:
NSString *aString = @"Hello";
NSString *bString = aString;
NSString *cString = @"Hello";
if (aString == bString)
NSLog(@"CHECK 1");
if (bString == cString)
NSLog(@"CHECK 2");
if ([aString isEqual:bString])
NSLog(@"CHECK 3");
if ([aString isEqual:cString])
NSLog(@"CHECK 4");
NSLog(@"%i", aString);
NSLog(@"%i", bString);
NSLog(@"%i", cString);
但是结果让我感到惊讶:
Equal[6599:10b] CHECK 1
Equal[6599:10b] CHECK 2
Equal[6599:10b] CHECK 3
Equal[6599:10b] CHECK 4
Equal[6599:10b] 8240
Equal[6599:10b] 8240
Equal[6599:10b] 8240
这里是否有一些编译器的技巧?