在方法中使用参数会改变方法的功能吗？
我尝试在谷歌和这个网站上搜索我的问题，但没有找到答案。
我是 Obj-C 的初学者，希望回答这个问题。
在我的方法中使用参数有什么好处？
例如..
-(id)initWithName:(NSString *)newName atFrequency:(double)newFreq {
self = [super init];
if (self != nil) {
name = newName;
frequency = newFrequency;
}
return self;
}
与
-(void)myMethod {
self = [super init];
if (self != nil) {
name = newName;
frequency = newFrequency;
}
return self;
}
我理解 -(void) 意味着该方法没有返回类型，而 -(id) 意味着第一个方法具有“id”作为返回类型，而“id”是通用的... ？
谁能帮忙解释一下吗 我希望我的问题是有道理的，谢谢大家的帮助。
I've tried searching google and this site regarding my question but found no answer.
I'm a beginner with Obj-C and would like this question answered.
What is the benefit of using parameters in my methods.
for example..
-(id)initWithName:(NSString *)newName atFrequency:(double)newFreq {
self = [super init];
if (self != nil) {
name = newName;
frequency = newFrequency;
}
return self;
}
versus
-(void)myMethod {
self = [super init];
if (self != nil) {
name = newName;
frequency = newFrequency;
}
return self;
}
I understand that the -(void) means the method has no return type, and the -(id) means that the first method has 'id' as a return type, and 'id' is generic....
can anyone help explain? I hope my question makes sense, thank you all for your help.
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参数是方法的输入，就像任何语言中的函数/方法参数一样。在第二个示例中，在
Frequency = newFrequency;行上，newFrequency应该来自哪里？在其他语言中，您可能会遇到类似的情况
在 Obj-C 中，等效项是
不同之处在于，在 Obj-C 中，每个参数都有一个额外的方法名称（例如
atFrequency) — 在本例中，方法名称为initWithName:atFrequency:，而不仅仅是initWithName:。（这实际上是可选的，每个参数只需要有一个
:。从技术上讲，initWithName::仍然是一个有效的方法名称，但这在 Obj 中不被认为是好的做法-C.)另请参阅：
Parameters are inputs to a method, just like function/method parameters in any language. In your second example, on the line
frequency = newFrequency;, where isnewFrequencysupposed to come from?In other languages, where you might have something like
In Obj-C the equivalent is
The difference is that in Obj-C, there is an extra piece of the method name for each parameter (like the
atFrequency) — in this case, the method name isinitWithName:atFrequency:, not justinitWithName:.(This is actually optional, you only have to have a
:for each parameter. TechnicallyinitWithName::is still a valid method name, but that's not considered good practice in Obj-C.)See also: