将 nsmutablearray 从一个视图控制器传递到另一个视图控制器答案

【问题标题】：Pass nsmutablearray from one viewcontroller to another view controller将 nsmutablearray 从一个视图控制器传递到另一个视图控制器
【发布时间】：2013-05-15 09:59:09
【问题描述】：

在这里，我将值添加到 firstviewcontroller 中的 nsmutablearray。当我单击 UIButton 时，我想将此数组传递给另一个视图控制器。

AppointmentClass *appObj = [[AppointmentClass alloc]init];
appObj.subject = [key objectForKey:@"Subject"];
appObj.location = [key objectForKey:@"Location"];
appObj.scheduledStart = [key objectForKey:@"ScheduledStart"];
appObj.scheduledEnd = [key objectForKey:@"ScheduledEnd"];
[firstNameArray addObject:appObj];            
[appObj release];
appObj=nil;

当我将 firstnamearray 值传递给约会数据数组时。

secondviewcontroller *appointmentViewObject = [[secondviewcontroller alloc]initWithNibName:@"secondviewcontroller" bundle:nil];
[appointmentViewObject setAppointmentDataArray:firstNameArray];

从上面的约会数据数组返回一个空值。

[self presentModalViewController:appointmentViewObject animated:YES];
[appointmentViewObject release];

【问题讨论】：

检查 firstNameArray alloc 与否？
是 firstNameArray 是 alloc
问题是什么？
跳过presentModalViewController。并且一旦尝试 [self.navigationcontroller pushviewController:animated:];方法

标签： iphone ios

【解决方案1】：

你分配了数组吗？

NSMutableArray* firstNameArray = [NSMutableArray array];

【讨论】：

secondViewController 上的 AppointmentDataArray 是什么类型的属性？它应该是强大的或保留的。

【解决方案2】：

你可以尝试一件事：在secondviewcontroller.m添加如下方法：

-(id) initwithnibName:(NSString*)_nib withArray:(NSMutableArray*)_array{

  self = [super initWithNibName:_nib bundle:nil];

if (self) {
    self.array =_array;
}
return self;

}

并将-(id) initwithnibName:(NSString*)_nib withArray:(NSMutableArray*)_array; 添加到secondviewcontroller.h。

现在替换secondviewcontroller *appointmentViewObject = [[secondviewcontroller alloc]initWithNibName:@"secondviewcontroller" bundle:nil]; [appointmentViewObject setAppointmentDataArray:firstNameArray];

secondviewcontroller *appointmentViewObject = [[secondviewcontroller alloc]initwithnibName:@"secondviewcontroller" withArray:firstNameArray];

希望这会有所帮助。

【讨论】：

【解决方案3】：

尝试修改语句：

  [appointmentViewObject setAppointmentDataArray:firstNameArray];

有了这个：

  [appointmentViewObject setAppointmentDataArray:[NSArray arrayWithArray:firstNameArray]];

【讨论】：

【解决方案4】：

使用这个：

secondviewcontroller.h 文件

 NSMutableArray* AppointmentDataArray;

 @property(nonatomic,retain) NSMutableArray* AppointmentDataArray;
 -(void)setMyArray:(NSMutableArray *)arr;

secondviewcontroller.m 文件

 @synthesize AppointmentDataArray;

 - (id)initWithNibName:(NSString *)nibNameOrNil 
            bundle:(NSBundle *)nibBundleOrNil
 {
      if ((self = [super initWithNibName:nibNameOrNil 
                            bundle:nibBundleOrNil])) {
         // Custom initialization.
           AppointmentDataArray = [[NSMutableArray alloc] init];
       }
    return self;
  }

   -(void)setMyArray:(NSMutableArray *)arr{
          AppointmentDataArray=arr;
    }

///////当你按下时

   secondviewcontroller *appointmentViewObject = [[secondviewcontroller alloc]initWithNibName:@"secondviewcontroller" bundle:nil];
   [appointmentViewObject setMyArray:firstNameArray];
   [self presentModalViewController:appointmentViewObject animated:YES];

【讨论】：