当用于从plist文件读取字典文件时崩溃iPhone程序

Question

我正在学习使用Beginning iPhone 4编程为iPhone编程。今天，我决定创建一个我自己的程序，用一个数字字典和他们的法语版本阅读。应用程序应该在表格视图中显示数字，并且点击时应在alertview中显示法语版本。我还没有实现法语翻译的显示，因为我无法使表格视图正常工作。它显示数字，然后当我尝试向上或向下滚动时，它会崩溃。我不知道什么是错的。这里是plist文件：

<?xml version="1.0" encoding="UTF-8"?> 
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList- 1.0.dtd"> 
<plist version="1.0"> 
<dict> 
<key>1</key> 
<string>un</string> 
<key>2</key> 
<string>deux</string> 
<key>3</key> 
<string>trois</string> 
<key>4</key> 
<string>quatre</string> 
<key>5</key> 
<string>cinq</string> 
<key>6</key> 
<string>six</string> 
<key>7</key> 
<string>sept</string> 
<key>8</key> 
<string>huit</string> 
<key>9</key> 
<string>neuf</string> 
<key>10</key> 
<string>dix</string> 
<key>11</key> 
<string>onze</string> 
<key>12</key> 
<string>dooz</string> 
<key>13</key> 
<string>treize</string> 
<key>14</key> 
<string>quatorze</string> 
<key>15</key> 
<string>quinze</string> 
<key>16</key> 
<string>seize</string> 
<key>17</key> 
<string>dix-sept</string> 
<key>18</key> 
<string>dix-huit</string> 
<key>19</key> 
<string>dix-neuf</string> 
<key>20</key> 
<string>vingt</string> 
<key>21</key> 
<string>vingt et un</string> 
<key>22</key> 
<string>vingt-deux</string> 
<key>23</key> 
<string>vingt trois</string> 
<key>24</key> 
<string>vingt-quatre</string> 
<key>25</key> 
<string>vingt-cinq</string> 
<key>30</key> 
<string>trent</string> 
<key>32</key> 
<string>trent-deux</string> 
<key>40</key> 
<string>quarante</string> 
<key>43</key> 
<string>quarante trois</string> 
<key>50</key> 
<string>cinquante</string> 
<key>54</key> 
<string>cinquante quatre</string> 
<key>60</key> 
<string>soixante</string> 
<key>65</key> 
<string>soixante-cinq</string> 
<key>67</key> 
<string>soixante-sept</string> 
<key>70</key> 
<string>soixante-dix</string> 
<key>71</key> 
<string>soixante et onze</string> 
<key>72</key> 
<string>soixante-douze</string> 
<key>73</key> 
<string>soixante-treize</string> 
<key>74</key> 
<string>soixante-quatorze</string> 
<key>75</key> 
<string>soixante-quinze</string> 
<key>76</key> 
<string>soixante-seize</string> 
<key>77</key> 
<string>soixante-dix-sept</string> 
<key>78</key> 
<string>soixante-dix-huit</string> 
<key>79</key> 
<string>soixante-dix-neuf</string> 
<key>80</key> 
<string>quatre-vingts</string> 
<key>81</key> 
<string>quatre-vingt-et-un</string> 
<key>82</key> 
<string>quatre-vingt-deux</string> 
<key>83</key> 
<string>quatre-vingt-trois</string> 
<key>84</key> 
<string>quatre-vingt-quatre</string> 
<key>85</key> 
<string>quatre-vingt-cinq</string> 
<key>86</key> 
<string>quatre-vingt-six</string> 
<key>87</key> 
<string>quatre-vingt-sept</string> 
<key>88</key> 
<string>quatre-vingt-huit</string> 
<key>89</key> 
<string>quatre-vingt-neuf</string> 
<key>90</key> 
<string>quatre-vingt-dix</string> 
<key>91</key> 
<string>quatre-vingt-onze</string> 
<key>92</key> 
<string>quatre-vingt-douze</string> 
<key>93</key> 
<string>quatre-vingt-treize</string> 
<key>94</key> 
<string>quatre-vinigt-quatorze</string> 
<key>95</key> 
<string>quatre-vingt-quinze</string> 
<key>96</key> 
<string>quatre-vingt-seize</string> 
<key>97</key> 
<string>quatre-vingt-dix-sept</string> 
<key>98</key> 
<string>quatre-viingt-dix-huit</string> 
<key>99</key> 
<string>quatre-vingt-dix-neuf</string> 
<key>100</key> 
<string>cent</string> 
<key>200</key> 
<string>deux-cent</string> 
<key>300</key> 
<string>trois-cent</string> 
<key>900</key> 
<string>neuf-cent</string> 

我已加载plist文件到项目的资源文件夹中。我有一个创建tableview的NIB文件。然后在下面的代码，我读的plist文件的内容：

- (void)viewDidLoad { 
NSBundle *bundle = [NSBundle mainBundle]; 
NSString *plistPath = [bundle pathForResource:@"frenchNumbers" ofType:@"plist"]; 
NSDictionary *dictionary = [[NSDictionary alloc]initWithContentsOfFile:plistPath]; 
self.numberDictionary = dictionary; 
[dictionary release]; 

NSArray *keysInDictionary = [self.numberDictionary allKeys]; 
self.numerals = keysInDictionary; 
[keysInDictionary release]; 
    [super viewDidLoad]; 

这里是的TableView的数据源方法的代码：

-(NSInteger)tableView:(UITableView *) tableView numberOfRowsInSection:(NSInteger) section{ 
return [self.numerals count]; 
} 

-(UITableViewCell *) tableView:(UITableView *) tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { 
static NSString *FrenchNumbersIdentifier = @"FrenchNumbersIdentifier"; 

UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:FrenchNumbersIdentifier]; 

if (cell == nil) { 
    cell = [[[UITableViewCell alloc]initWithStyle:UITableViewCellStyleDefault 
            reuseIdentifier:FrenchNumbersIdentifier]autorelease]; 
} 

NSUInteger row = [indexPath row]; 
cell.textLabel.text = [numerals objectAtIndex:row]; 
NSLog(@"Value to be printed: %@",[numerals objectAtIndex:row]); 
return cell; 

}

-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath { 
NSUInteger row = [indexPath row]; 
NSString *rowValue = [numerals objectAtIndex:row]; 

NSString *message = [[NSString alloc] initWithFormat:@"You selected: %@",rowValue]; 

UIAlertView *alert = [[UIAlertView alloc]initWithTitle:@"Row Selected" 
               message:message delegate:nil 
            cancelButtonTitle:@"OK" 
            otherButtonTitles:nil]; 
[alert show]; 

[message release]; 
[alert release]; 
[tableView deselectRowAtIndexPath:indexPath animated:YES]; 
} 

如果我更换我的plist文件有一个简单的硬编码数组并加载到tableview中，代码工作得很好，我可以选择行并显示alertview。我的猜测是我的字典或字典加载方法有问题。我无法弄清楚什么。你能帮忙吗？！

Answer 1

NSArray *keysInDictionary = [self.numberDictionary allKeys]; 
self.numerals = keysInDictionary; 
[keysInDictionary release]; // <- remove this line 

不要发布keysInDictionary。你已经用一个返回一个自动释放对象的便捷方法创建它。而当你（应该）知道它是只允许释放你自己的对象（即对象发送一个alloc，retain，new或copy消息）

也许你应该重新读取Memory Management Programming Guide。了解内存管理至关重要。