iOS 属性传值要注意的几个问题

从firstViewController 传值到 secondViewController，注意以下几点：

1.该属性比如：text ，要在 secondViewController中声明，并且是在.h中声明，在.m中声明是不可见的

2.在firstViewController 要 #import"secondViewController.h"

3.在firstViewController 中，要在实例化secondViewController之后，紧接着赋值，比如secondViewController.text = XXX；

```

#import "ViewController.h"

#import "Person.h"

#import "Lawyer.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {

    Person* laowang = [Personnew];

    Lawyer* lawyer = [Lawyernew];

    laowang.person_delegate= lawyer;

    if([lawyerrespondsToSelector:@selector(getMoney:value:)]) {

        [laowangwantMoneyBack];

    }

}

@end

```