objective-c - Objective-C 中的指定初始化器

Question

只是为了确认在 Objective-C 中创建指定初始化程序的正确方法吗？

这是初始化 ivar 的正确方法吗？

你能建议我改进什么吗？

人.h

@interface Person : NSObject 


@property (nonatomic, retain) NSString *name;
@property (nonatomic, assign) int age;
@property (nonatomic, assign) NSString *sex;
@property (nonatomic, assign) int weight;

-(id)initWithName:(NSString *)name;
-(id)initWithName:(NSString *)name age:(int)age;
-(id)initWithName:(NSString *)name age:(int)age sex:(NSString *)s;
-(id)initWithName:(NSString *)name age:(int)age sex:(NSString *)s andWeight:(float)w;


@end

人.m

@implementation Person

@synthesize name = _name;
@synthesize sex = _sex;
@synthesize age = _age;
@synthesize weight = _weight;

-(id)initWithName:(NSString *)name age:(int)age sex:(NSString *)s andWeight:(float)w
{
    if(self = [super init])
    {
        [self setName:name];
        [self setAge:age];
        [self setSex:s];
        [self setWeight:w];
    }
    return self;
}

-(id)initWithName:(NSString *)name age:(int)age sex:(NSString *)s
{
    return [self initWithName:name age:age sex:s andWeight:0];
}

-(id)initWithName:(NSString *)name age:(int)age
{
    return [self initWithName:name age:age sex:0];
}

-(id)initWithName:(NSString *)name
{
    return [self initWithName:name age:0];
}

-(id)init
{
    return [self initWithName:nil];
}

提前致谢!

Answer 1

我认为是正确的。您可以通过从任何其他方法调用 main init 方法来提高效率，这样您就不会进行链式调用，但我认为没有太大区别。