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2017-01-24 本文已影响0人
樊玺
```
NSMutableString* mt1 = [NSMutableStringstringWithString:@"tttt"];
NSMutableString* mt2 = @"hhhh";
NSLog(@"%p",mt1);
NSLog(@"%@", mt1.class);
NSLog(@"%@", mt2.class);
[mt1 appendString:@"fff"];
[mt2 appendString:@"fff"];
NSLog(@"%p",mt1);
NSLog(@"%p",mt2);
```
