在目标c中声明浮动 [英] Declaring floats in objective c

问题描述

我是 Objective-C 的新手，而我在整个非原子时遇到了问题，强，弱等等。我想知道使用核心数据是否会出现任何问题带 float 定义如下的值：

I'm new to Objective-C and I'm having trouble with the whole nonatomic, strong, weak, etc. I'm wondering if I will have any issues using Core Data with float values which are defined like so:

@property (nonatomic) float * rating;
@property (nonatomic) float * mRating;

我应该以不同方式声明吗？

Should I declare the differently?

推荐答案

是的，你应该声明它们没有星号：

Yes, you should declare them without asterisks:

@property (nonatomic) float rating;
@property (nonatomic) float mRating;

星号表示指针。所有Objective C类都用星号声明，因为实例是通过指针引用的。诸如 float s， int s等原语被定义为 values ，即没有星号。对于typedef-ed类型也是如此，例如 CGFloat 和 NSInteger ：这些类型的标量字段应该没有星号来定义。

Asterisks indicate pointers. All Objective C classes are declared with asterisks, because instances are referred to through pointers. Primitives such as floats, ints, etc. are defined as values, i.e. without asterisks. Same goes for typedef-ed types such as CGFloat and NSInteger: scalar fields of these types should be defined without an asterisk.

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