无法将数据写入plist文件 [英] Failed to write data into plist file
问题描述
我已经在互联网上检查了方法,但是那无法更新数据.
I have check the method on the internet, but thats fail to update the data.
在pickerView:didSelectRow:inComponent方法中,我测试了cameraCode,在pickerView中选择不同的行后,数组的键已更改,但是该值尚未写入我的plist文件(名为MultiSetting.plist),即使我写了这样的语句:
In the pickerView:didSelectRow:inComponent method, I tested cameraCode, the key of the array has been changed after I choose different row in pickerView, but the value has not write in my plist file, which is named MultiSetting.plist, even though I write the statement:
path = [[NSBundle mainBundle] pathForResource:@"MultiSetting" ofType:@"plist"];
[settingInfo writeToFile:path atomically:YES];
有什么可以帮助我提高自己的技能的吗?
Is there any can help me to improve my skill?
这是我的代码:
MultiSettingViewController.h
MultiSettingViewController.h
#import <UIKit/UIKit.h>
@interface MultiSettingViewController : UIViewController
@property (nonatomic) NSInteger *camNum;
@property (nonatomic, retain) IBOutlet UIPickerView *picker;
@property (strong, nonatomic) IBOutlet UITextField *textField;
@property (nonatomic,retain) IBOutlet UISegmentedControl *segmentedControl;
@property (retain, nonatomic) IBOutlet UILabel *regionLabel;
@property (retain, nonatomic) IBOutlet UILabel *placeLabel;
@property (nonatomic, retain) NSArray *placeArray;
@property (strong, nonatomic) NSMutableArray *settingArray;
@property (strong, nonatomic) UIToolbar *doneToolbar;
@property (strong, nonatomic) NSBundle *bundle;
@property (strong, nonatomic) NSString *path;
@property (strong, nonatomic) NSBundle *bundle1;
@property (strong, nonatomic) NSString *path1;
- (IBAction)segmentedControlIndexChanged;
- (void)doneBtn_OnClick:(id)sender;
- (IBAction)textfield_OnClick:(id)sender;
@end
MultiSettingViewController.m
MultiSettingViewController.m
#import "MultiSettingViewController.h"
@implementation MultiSettingViewController
@synthesize camNum, picker, placeArray, settingArray, textField, doneToolbar, segmentedControl, bundle, path, bundle1, path1, regionLabel, placeLabel;
- (void)viewDidLoad{
[super viewDidLoad];
//NSLog(@"%i", camNum);
bundle = [NSBundle mainBundle];
path = [bundle pathForResource:@"HK" ofType:@"plist"]; placeArray = [[NSArray alloc] initWithContentsOfFile:path];
bundle = [NSBundle mainBundle];
path = [bundle pathForResource:@"MultiSetting" ofType:@"plist"]; settingArray = [[NSMutableArray alloc] initWithContentsOfFile:path];
if (self.segmentedControl.selectedSegmentIndex == 0){
NSInteger selectedRow = [self.picker selectedRowInComponent:0];
NSDictionary *placeInfo = [placeArray objectAtIndex:selectedRow];
[regionLabel setText:[placeInfo objectForKey:@"name"]];
}
if(self.doneToolbar == nil){
self.doneToolbar = [[UIToolbar alloc] initWithFrame: CGRectMake(0, 0, 320, 40)];
UIBarButtonItem *doneBtn = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemDone
target:self
action:@selector(doneBtn_OnClick:)];
[self.doneToolbar setItems: [NSArray arrayWithObject:doneBtn]];
}
self.textField.inputView = self.picker;
self.textField.inputAccessoryView = self.doneToolbar;
self.textField.delegate = self;
self.picker.delegate = self;
self.picker.dataSource = self;
self.picker.hidden = YES;
self.doneToolbar.barStyle = UIBarStyleBlackTranslucent;
self.doneToolbar.hidden = YES; }
-(IBAction) segmentedControlIndexChanged{
switch (self.segmentedControl.selectedSegmentIndex){
case 0:
bundle = [NSBundle mainBundle];
path = [bundle pathForResource:@"HK" ofType:@"plist"];
placeArray = [[NSArray alloc] initWithContentsOfFile:path];
[self.picker reloadAllComponents];
NSInteger selectedRow = [self.picker selectedRowInComponent:0];
NSDictionary *placeInfo = [placeArray objectAtIndex:selectedRow];
[regionLabel setText:[placeInfo objectForKey:@"name"]];
break;
case 1:
bundle = [NSBundle mainBundle];
path = [bundle pathForResource:@"KW" ofType:@"plist"];
placeArray = [[NSArray alloc] initWithContentsOfFile:path];
[self.picker reloadAllComponents];
selectedRow = [self.picker selectedRowInComponent:0];
placeInfo = [placeArray objectAtIndex:selectedRow];
[regionLabel setText:[placeInfo objectForKey:@"name"]];
break;
case 2:
bundle = [NSBundle mainBundle];
path = [bundle pathForResource:@"TW" ofType:@"plist"];
placeArray = [[NSArray alloc] initWithContentsOfFile:path];
[self.picker reloadAllComponents];
selectedRow = [self.picker selectedRowInComponent:0];
placeInfo = [placeArray objectAtIndex:selectedRow];
[regionLabel setText:[placeInfo objectForKey:@"name"]];
break;
case 3:
bundle = [NSBundle mainBundle];
path = [bundle pathForResource:@"TM" ofType:@"plist"];
placeArray = [[NSArray alloc] initWithContentsOfFile:path];
[self.picker reloadAllComponents];
selectedRow = [self.picker selectedRowInComponent:0];
placeInfo = [placeArray objectAtIndex:selectedRow];
[regionLabel setText:[placeInfo objectForKey:@"name"]];
break;
case 4:
bundle = [NSBundle mainBundle];
path = [bundle pathForResource:@"TP" ofType:@"plist"];
placeArray = [[NSArray alloc] initWithContentsOfFile:path];
[self.picker reloadAllComponents];
selectedRow = [self.picker selectedRowInComponent:0];
placeInfo = [placeArray objectAtIndex:selectedRow];
[regionLabel setText:[placeInfo objectForKey:@"name"]];
break;
case 5:
bundle = [NSBundle mainBundle];
path = [bundle pathForResource:@"ST" ofType:@"plist"];
placeArray = [[NSArray alloc] initWithContentsOfFile:path];
[self.picker reloadAllComponents];
selectedRow = [self.picker selectedRowInComponent:0];
placeInfo = [placeArray objectAtIndex:selectedRow];
[regionLabel setText:[placeInfo objectForKey:@"name"]];
break;
case 6:
bundle = [NSBundle mainBundle];
path = [bundle pathForResource:@"LT" ofType:@"plist"];
placeArray = [[NSArray alloc] initWithContentsOfFile:path];
[self.picker reloadAllComponents];
selectedRow = [self.picker selectedRowInComponent:0];
placeInfo = [placeArray objectAtIndex:selectedRow];
[regionLabel setText:[placeInfo objectForKey:@"name"]];
break;
default:
break;
} }
#pragma mark -
#pragma mark UIPickerViewDataSource methods
- (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView { return 1; }
- (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component { return [placeArray count]; }
#pragma mark -
#pragma mark UIPickerViewDelegate methods
- (NSString *)pickerView:(UIPickerView *)pickerView
titleForRow:(NSInteger)row forComponent:(NSInteger)component { NSDictionary *placeInfo = [placeArray objectAtIndex:row]; return [placeInfo objectForKey:@"name"]; }
- (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row
inComponent:(NSInteger)component { NSDictionary *placeInfo = [placeArray objectAtIndex:row]; NSString *name = [placeInfo objectForKey:@"name"];
self.placeLabel.text = name;
NSString *code = [placeInfo objectForKey:@"cameraCode"];
NSMutableDictionary *settingInfo = [settingArray objectAtIndex:(NSInteger)camNum];
NSLog(@"%@", [settingInfo objectForKey:@"cameraCode"]);
[settingInfo setObject:code forKey:@"cameraCode"];
NSLog(@"%@", [settingInfo objectForKey:@"cameraCode"]);
path = [[NSBundle mainBundle] pathForResource:@"MultiSetting" ofType:@"plist"];
[settingInfo writeToFile:path atomically:YES];
//[self obtainPic:cameraCode];
/*aTimer = [NSTimer scheduledTimerWithTimeInterval:60.0
target:self
selector:@selector(timerFired:)
userInfo:nil
repeats:YES];
*/ }
- (void)doneBtn_OnClick:(id)sender{
[self.textField endEditing:YES];
self.picker.hidden = YES;
self.doneToolbar.hidden = YES; }
- (IBAction)textfield_OnClick:(id)sender{
self.picker.hidden = NO;
self.doneToolbar.hidden = NO; }
- (void)didReceiveMemoryWarning{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated. }
@end
非常感谢您的真诚帮助!
Really thanks for your sincerely help!
推荐答案
主捆绑包中的所有内容均为只读;因此,您的日志中可能会出现Cocoa错误513(无法完成操作.不允许执行操作" ).
Everything included in the main bundle is read-only; thus, you might have a Cocoa Error 513 ("The operation couldn’t be completed. Operation not permitted") in your log.
您还有其他三个用于读取/写入数据的文件夹:Temp
,Cache
和Documents
You have three others folders for data storage which are read/write : Temp
, Cache
and Documents
您可以在运行时在文档文件夹中创建文件MultiSetting.plist
,然后将其写入.
You might create your file MultiSetting.plist
in the Document folder at runtime, then write into it.
您可以像这样检索文档目录的路径:
You can retrieve the path to the document directory like this :
NSArray * documentPath = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString * documentDirectory = [documentPath objectAtIndex:0];
编辑
然后,您可以在其中复制pList(请注意,如前所述,它是只读的,因此您将无法将其移动或从包中删除它).为此,请使用NSFileManagers的函数 -copyItemAtPath :
Edit
Then, you can copy your pList in there (note that as stated before, it is read-only, so you won't be able to move it nor delete it from your bundle). For this, use NSFileManagers's function -copyItemAtPath :
- (BOOL)copyItemAtPath:(NSString *)srcPath toPath:(NSString *)dstPath error:(NSError **)error
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