自iOS 4起，您可以编写

since iOS 4, you can write

@interface MyInterface : NSObject {
}

@property(assign) NSInteger myVariable; 

@implementation MyInterface
@synthesize myVariable;
@end

这意味着您可以在接口声明中省略NSInteger myVaribale，只要在.m中进行合成即可(合成将创建setter，getter和instance变量)

Meaning you can omit the NSInteger myVaribale in your interface declaration as long as you synthesize it in the .m (the synthesize will create setter, getter and instance variable)

缺点是您不会在Xcode的调试器中看到myVariable的值.

A drawback is that you won't see the value of myVariable in Xcode's debugger.