Autosynthesized property 警告

[tigercoco]

之前在另外一个viewcontroll实现相同的功能都没有警告，也是相同的声明。但在这个viewcontroller却有这个警告，请问怎修改才能去掉警告。
warning:
Autosynthesized property 'myVar' will use synthesized instance variable '_myVar', not existing instance variable 'myVar'.
我所有在@synthesize 里的变量或者说在@property里面的变量都有这个警告。
我的.h file

#import <UIKit/UIKit.h>

@interface NavigationTripViewController : UIViewController <UIPickerViewDelegate, UIPickerViewDataSource>{
    NSArray *questionTitleTrip;
    NSArray *questionDescTrip;
    NSMutableArray *answerTrip;
    NSMutableArray *pickerChoices;
    int questionInt;
    int totalInt;
    IBOutlet UILabel *questionNum;
    IBOutlet UILabel *questionTotalNum;
    IBOutlet UILabel *recordType;
    IBOutlet UITextView *questionDes;
    IBOutlet UIView *answerView;
    IBOutlet UIButton *preButton;
    IBOutlet UIButton *nextButton;
    UITextField *text;
    UIPickerView *picker;








}
@property (retain, nonatomic) NSArray *questionTitleTrip;
@property (retain, nonatomic) NSArray *questionDescTrip;
@property (retain, nonatomic) NSMutableArray *answerTrip;
@property (retain, nonatomic) NSMutableArray *pickerChoices;
@property (retain, nonatomic) IBOutlet UILabel *questionNum;
@property (retain, nonatomic) IBOutlet UILabel *questionTotalNum;
@property (retain, nonatomic) IBOutlet UILabel *recordType;
@property (retain, nonatomic) IBOutlet UITextView *questionDes;
@property (retain, nonatomic) IBOutlet UIView *answerView;
@property (retain, nonatomic) IBOutlet UIButton *preButton;
@property (retain, nonatomic) IBOutlet UIButton *nextButton;
@property (retain, nonatomic) UITextField *text;
@property (retain, nonatomic) UIPickerView *picker;
-(IBAction)clickPre;
-(IBAction)clickNext;
@end

我的.m file：

#import "NavigationTripViewController.h"
#import <QuartzCore/QuartzCore.h>

@interface NavigationTripViewController ()

@end

@implementation NavigationTripViewController

@synthesize questionTitleTrip,questionDescTrip,answerTripl,pickerChoices,questionNum,questionTotalNum,recordType,questionDes,answerView,preButton,nextButton,text,picker;

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

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view from its nib.
    questionInt = 1 ;
    questionTitleTrip = [[NSArray alloc] initWithObjects:
                         @"",
                         @"Record TYPE 4- Trip Information",

也许有警告的缘故questionInt，questionTitleTrip, NsArray没有显示相关的字体颜色，只是显示黑色的。这个view是一个navigation中得一个view, 需要在编辑的时候把UIview类换成自己本身的类吗，NavigationTripViewController？谢谢

[baozhifei]

@property (retain, nonatomic) NSArray *questionTitleTrip; 在头文件中这样写，默认会生成一个_questionTitleTrip变量。 所以，在实现文件中最好这样写。 @synthesize questionTitleTrip ＝ _questionTitleTrip

[小杨在玩iOS]

接着楼上的说,使用@property定义变量ivar无非三种情况 1）没有合成@synthesized ，则系统会通过Autosynthesized合成一个_ivar 2）如果使用@synthesized ivar；则声称的变量为ivar 3）如果使用@synthesized ivar = _ivar；则声明的变量为_ivar。 如果使用self.ivar则三种定义方法都可以，因为self.ivar是调用的getter方法。 最后，目前Apple推荐的定义方法是第3）种。而且无需在@interface里面再定义变量，如果需要定义私有变量的话，可以在.m中用@property定义。要说的就这么多

[tigercoco]

自己顶下吧....哎...