XCode 警告：初始化使指针从整数而不进行强制转换（尝试为 NSNumber 赋值时）
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XCode warning : Initialization makes pointer from integer without a cast (while trying to assign a value to a NSNumber)
提问by NSSec
I'm stuck with a warning in Xcode while trying to develop a small iPhone App. I've got this piece of code in Xcode :
我在尝试开发一个小型 iPhone 应用程序时遇到了 Xcode 中的警告。我在 Xcode 中有这段代码：
NSNumber *randomNumber = arc4random() % [array count];
NSNumber *randomNumber = arc4random() % [数组计数];
If I NSLog randomNumber, everything seems to work but Xcode keeps warning me, saying :
如果我 NSLog randomNumber，一切似乎都正常，但 Xcode 不断警告我，说：
Initialization makes pointer from integer without a cast
初始化使指针从整数而不进行强制转换
There must be something I didn't understand. Thanks in advance for helping me out :)
一定有什么我不明白的地方。在此先感谢您帮助我:)
回答by NSSec
NSNumber is an objc object, while an int or float isn't. You're now assigning an int/float to a pointer, which isn't quite right.
NSNumber 是一个 objc 对象，而 int 或 float 不是。您现在将一个 int/float 分配给一个指针，这不太正确。
Try:
尝试：
// if the result is an int:
NSNumber *randomNumber = [NSNumber numberWithInt: (arc4random() % [array count])];
// if the result is a float:
NSNumber *randomNumber = [NSNumber numberWithFloat: (arc4random() % [array count])];
