#import "ViewController.h"
@interface ViewController ()
@end
@implementation ViewController
void func(__strong NSString ** str1, __strong NSString ** str2){
NSString * strNew = @"新的内容1";
NSString * strNew2 = @"新的内容2";
*str1 = strNew;
*str2 = strNew2;
};
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
NSString * str1 = @"str1";
NSString * str2 = @"str2";
// 核心:传入对象引用的指针.
func(&str1, &str2);
NSLog(@"str1 = %@ \n str2 = %@", str1, str2);
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
@end
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