無法保存plist ios

Question

我能夠保存plist文件在模擬器中，但我無法將Plist文件保存在設備中。任何建議。

我爲使用

NSString* dictPath = [[NSBundle mainBundle] pathForResource:@"Dictionary" ofType:@"plist"]; 
NSDictionary * dict = [[NSDictionary alloc] initWithContentsOfFile:dictPath]; 

讀取文件

和

[dict writeToFile:dictPath atomically: YES]; 

寫入文件。

Answer 1

通常，您可以根據文件將這些文件存儲在〜/文檔或〜/庫中。問題What is the documents directory (NSDocumentDirectory)?包含您需要理解的文檔鏈接和示例代碼。

Answer 2

您需要保存的plist文件中的目錄

寫

NSString *mainBundlePath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0]; 
NSString *dictPath = [mainBundlePath stringByAppendingPathComponent:@"Dictionary"]; 
NSDictionary * dict = ...; //Construct your dictionary 
[dict writeToFile:dictPath atomically: YES]; 

閱讀

NSDictionary * dict = [[NSDictionary alloc] initWithContentsOfFile:dictPath]; 

Answer 3

你不能寫主束。你只能從主包中讀取。如果你想寫一個文件，你需要把它放在你的應用程序的文檔目錄中。

NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); 
NSString *documentsDirectory = [paths objectAtIndex:0]; 
NSString *path = [documentsDirectory stringByAppendingPathComponent:[NSString stringWithFormat:@"%@.plist",plistName]]; 

如果您需要主包中的plist，您可以先將其複製到文檔目錄中，然後對其進行修改。建議進行檢查以確保只複製一次。

NSError *error; 
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); 
NSString *documentsDirectory = [paths objectAtIndex:0]; 
NSString *path = [documentsDirectory stringByAppendingPathComponent:[NSString stringWithFormat:@"%@.plist",plistName]]; 

NSFileManager *fileManager = [NSFileManager defaultManager]; 

if (![fileManager fileExistsAtPath: path]){ 
    NSLog(@"File don't exists at path %@", path); 

    NSString *plistPathBundle = [[NSBundle mainBundle] pathForResource:plistName ofType:@"plist"]; 

    [fileManager copyItemAtPath:plistPathBundle toPath: path error:&error]; 
}else{ 
    NSLog(@"File exists at path:%@", path); 
}