The lighting of both over / underexposure arrows in the finder indicates correct exposure 在取景器中可观察到曝光过/欠的箭头符号。
3.
Static properties cannot be accessed through the object using the arrow operator - > . calling non - static methods statically generates an e _ strict level warning 静态成员不能被类的对象通过箭头符号- >来调用。静态的调用一个非静态方法会导致一个e _ strict级别的警告。
