据说下面两个问题都能答对的不到1%

最新推荐文章于 2024-09-17 18:56:53 发布

Sodaslay

最新推荐文章于 2024-09-17 18:56:53 发布

阅读量623

点赞数 1

CC 4.0 BY-SA版权

分类专栏： Objective-C iOSX Dev Cocoa框架

本文链接：https://blog.youkuaiyun.com/sodaslay/article/details/50913397

iOSX Dev 同时被 3 个专栏收录

387 篇文章

订阅专栏

Objective-C

271 篇文章

订阅专栏

Cocoa框架

61 篇文章

订阅专栏

本文深入探讨了Objective-C与Swift两种编程语言在iOS开发领域的应用，包括其历史背景、语法特点、优缺点及实际项目案例分析。

Question1:

@interface Rectangle : NSObject

@property (nonatomic, copy) NSMutableString *name;

@end

@implementation Rectangle

- (void)setName:(NSMutableString *)name {
_name = name;
}

@end

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
Rectangle *object = [[Rectangle alloc] init];
NSMutableString *mStr = [NSMutableString stringWithFormat:@"Hello, world"];
object.name = mStr;
NSLog (@"mStr: %p object.name: %p", mStr, object.name);

return YES;
}

请问上面代码打印的两个对象地址是否相同？

Question2:

@interface Rectangle : NSObject

@property (nonatomic, copy) NSString *name;

@end

@implementation Rectangle

- (void)setName:(NSString *)name {
_name = [name copy]
}

@end

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
Rectangle *object = [[Rectangle alloc] init];
NSString *mStr = [NSString stringWithFormat:@"Hello, world"];
object.name = mStr;
NSLog (@"mStr: %p object.name: %p", mStr, object.name);

return YES;
}