iOS中的对象等同性 Jan 06, 2016 in 编程语言 使用 == 比较 iOS 中的对象时,比较的是对象的指针。例如有如下比较时: 123456789NSString *str = @"origin1";NSString *strCopy = [str copy];NSString *str1 = [NSString stringWithFormat:@"origin%@", @1]; BOOL equalA = (str == strCopy);BOOL equalB = (str == str1);BOOL equalC = [str isEqualToString:str1]; /**< equalC is YES */BOOL equalD = [str isEqual:str1]; /**< equalD is YES */ Continue reading