People *p = [[People alloc] init];
[self test:p];
//[self test1:<#(People *__autoreleasing *)#>]
//&p取p的地址。&对象名字
//双指针一般情况下当做参数用
[self test1:&p];
}
-(void)test:(People *)aPeople {
aPeople.name=@"pointer";
}
-(void)test1:(People **)aPeople {
* aPeople = [[People alloc] init];
}
