Question

我有一个必须发送到另一个viewcontroller的字符串数据 - 在我的例子中是一个tabbarcontroller。我在发送时收到了空数据。以下是代码段：

ViewController.h

#import <UIKit/UIKit.h>
@class ViewController2;

@interface ViewController1 : UIViewController{

@private
ViewController2 *suiteNo;

}

@property(nonatomic,retain) ViewController2 *viewController2;


-(IBAction)suiteNumber:(UIButton *)sender;
@end

我已在.m文件中声明如下

ViewController1.m

@synthesize viewController2;

//data accessed
self.viewController2.suiteNum = [[sender titleLabel] text];

ViewController2.h

#import <UIKit/UIKit.h>



@interface ViewController2 : UIViewController{

NSString *suiteNum;

  }

 @property(nonatomic,copy)NSString *suiteNum;
 @end

ViewController2.m

@synthesize suiteNum;

//the passed string is used here
NSString *firstURL = [segmentOneURL stringByAppendingString:suiteNum];

我有错误的地方吗？如果我错了请纠正我。谢谢。

Answer 1

不是在viewcontroller2中创建suiteNum属性，而是在appdelegate中声明suiteNum并将字符串值从viewcontroller1复制到suiteNum

像这样：= AppDelegate * appdelegate1 =（AppDelegate *）[[UIApplication sharedApplication] delegate];

appdelegate1.suiteNum = [[sender titleLabel] text];

当viewcontroller2出现时覆盖它的viewwillappear委托为

AppDelegate * appdelegate1 =（AppDelegate *）[[UIApplication sharedApplication] delegate];

NSString * firstURL = appdelegate1.suiteNum;

将字符串从一个viewcontroller传递到另一个Tabbarcontroller

1 个答案: