我对iOS平台相当陌生,并且在内存管理方面遇到了一些问题。我通过一个自定义的UIViewController类的初始化程序传入一个对象(试用版),当UIViewController最终收到它时,该对象为零。我希望有人能够指引我走向正确的方向。我已经在下面列出了一些源代码。iOS初始化参数为零
Trial.h
@interface Trial : NSObject {
NSString *IRBNumber;
NSString *PI;
NSString *Sponsor;
NSString *ContactName;
NSString *ContactPhone;
NSString *ContactEmail;
NSString *Location;
NSString *Objective;
NSString *Eligibility;
NSString *Name;
NSString *DiseaseGroup;
NSString *Age;
}
@property (retain, nonatomic) NSString *IRBNumber;
@property (retain, nonatomic) NSString *PI;
@property (retain, nonatomic) NSString *Sponsor;
@property (retain, nonatomic) NSString *ContactName;
@property (retain, nonatomic) NSString *ContactEmail;
@property (retain, nonatomic) NSString *ContactPhone;
@property (retain, nonatomic) NSString *Location;
@property (retain, nonatomic) NSString *Objective;
@property (retain, nonatomic) NSString *Eligibility;
@property (retain, nonatomic) NSString *Name;
@property (retain, nonatomic) NSString *DiseaseGroup;
@property (retain, nonatomic) NSString *Age;
@end
DiseaseControllersViewController.m
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
Trial *trial = (Trial *)[dataArray objectAtIndex:indexPath.row];
TrialDetailController *detailViewController = [[TrialDetailController alloc] initWithNibNameAndTrial:@"TrialDetailController" bundle:nil trial:trial];
[self.navigationController pushViewController:detailViewController animated:YES];
[detailViewController release];
[trial release];
}
这里的初始化
-(id)initWithNibNameAndTrial: (NSString*)NibNameOrNil bundle:(NSBundle*)nibBundlerOrNil trial:(Trial *)inTrial {
self = [super initWithNibName:NibNameOrNil bundle:nibBundlerOrNil];
if(self) {
self.trial = inTrial;
}
return self;
}
TrialDetailController.h
#import "Trial.h"
@interface TrialDetailController : UITabBarController {
Trial *trial;
}
@property (nonatomic, retain) Trial *trial;
-(id)initWithNibNameAndTrial: (NSString*)NibNameOrNil bundle:(NSBundle*)nibBundlerOrNil trial:(Trial *)inTrial;
-(IBAction)objectiveTabItemClick:(id)sender;
-(IBAction)detailsTabItemClick:(id)sender;
@end
的定义
你可以发布TrialDetailController的init-Method的代码吗? – samsam
你明白了。我刚刚发布了它。 – Hopdizzle
你试过调试过吗?您可以在gdb调试器(控制台窗口)中设置断点并查看变量/属性值。请参阅[XCode4中的Objective-C调试技巧?](http://stackoverflow.com/a/7650979/590956)。只是想知道'po dataArray'会在调试器中显示什么。你在哪里添加值到这个数组中,并且在你尝试向它添加对象之前初始化数组? – Sam