Question

我将一个UISearchBar拖到我的xib上，将它连接到我的文件所有者的委托和searchBar作为插座。当我用搜索栏切换到视图时，我遇到了崩溃。我不知道我做错了什么，我是否需要在停止崩溃之前实现搜索栏委托方法？

#import <UIKit/UIKit.h>

@interface ThirdViewController : UIViewController {
 @private UISearchBar *searchBar_;
}
@property (nonatomic, retain) IBOutlet UISearchBar *searchBar;

@end

#import "ThirdViewController.h"

@implementation ThirdViewController
 @synthesize
  searchBar = searchBar_;

 - (void)viewDidLoad
 {
   [super viewDidLoad];
 }

- (void)didReceiveMemoryWarning {
  // Releases the view if it doesn't have a superview.
  [super didReceiveMemoryWarning];

  // Release any cached data, images, etc. that aren't in use.
}

- (void)viewDidUnload {
  [super viewDidUnload];

  // Release any retained subviews of the main view.
  // e.g. self.myOutlet = nil;
}

- (void)dealloc {
  [searchBar_ release], searchBar_ = nil;
  [super dealloc];
}

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
  [self.searchBar resignFirstResponder];
}

@end

Answer 1

它实际上是一个问题，它是如何连接到xib文件中的，与.h / .m文件无关。

Answer 2

这是dealloc的问题。你已经发布了searchBar。你没有分配它。所以不要发布它。

Answer 3

为什么你发布了你的searchBar，你从来没有为它分配任何内存，因此你无法释放它。

尝试实现UISearchBar时，程序因NSException而崩溃

3 个答案: