I have a JSON request which returns different parameters, name for example. I would like to cache a variable for the name parameter, which I can view in the app later.
我有一个JSON请求,返回不同的参数,例如名称。我想为name参数缓存一个变量,稍后我可以在app中查看。
For example: name from JSON request = david. the variable is called firstname. firstname should equal "david". firstname should be stored so I can view it in all parts of my apps.
例如:来自JSON request = david的名称。该变量称为firstname。 firstname应该等于“david”。应存储名字,以便我可以在我的应用程序的所有部分中查看它。
I saw another similar question were one solution was:
我看到另一个类似的问题是一个解决方案是:
NSString *valueToSave = @"someValue";
[[NSUserDefaults standardUserDefaults]
setObject:valueToSave forKey:@"preferenceName"];
and to get it back later:
并在以后取回它:
NSString *savedValue = [[NSUserDefaults standardUserDefaults]
stringForKey:@"preferenceName"];
How can I use this method when I'm parsing a JSON file like this?:
在解析像这样的JSON文件时,如何使用此方法?:
@implementation Videos
@synthesize tableView = _tableView, activityIndicatorView = _activityIndicatorView, movies = _movies;
- (void)viewDidLoad
{
[super viewDidLoad];
self.title = @"Title";
self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"Menu"
style:UIBarButtonItemStylePlain
target:(DEMONavigationController *)self.navigationController
action:@selector(showMenu)];
NSString *valueToSave = @"TitleString";
[[NSUserDefaults standardUserDefaults]
setObject:valueToSave forKey:@"title"];
self.tableView.separatorColor = [UIColor clearColor];
// Setting Up Activity Indicator View
self.activityIndicatorView = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleGray];
self.activityIndicatorView.hidesWhenStopped = YES;
self.activityIndicatorView.center = self.view.center;
[self.view addSubview:self.activityIndicatorView];
[self.activityIndicatorView startAnimating];
self.tableView.separatorColor = [UIColor clearColor];
// Initializing Data Source
self.movies = [[NSArray alloc] init];
NSURL *url = [[NSURL alloc] initWithString:@"http://link-to-json.php?name=Name"];
NSURLRequest *request = [[NSURLRequest alloc] initWithURL:url];
AFJSONRequestOperation *operation = [AFJSONRequestOperation JSONRequestOperationWithRequest:request success:^(NSURLRequest *request, NSHTTPURLResponse *response, id JSON) {
self.movies = JSON;
[self.activityIndicatorView stopAnimating];
[self.tableView reloadData];
} failure:^(NSURLRequest *request, NSHTTPURLResponse *response, NSError *error, id JSON) {
NSLog(@"Request Failed with Error: %@, %@", error, error.userInfo);
}];
[operation start];
}
// Table View Data Source Methods
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
if (self.movies && self.movies.count) {
return self.movies.count;
} else {
return 0;
}
}
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
return 374;
}
- (void)tableView:(UITableView *)tableView
willDisplayCell:(UITableViewCell *)cell
forRowAtIndexPath:(NSIndexPath *)indexPath
{
[cell setBackgroundColor:[UIColor clearColor]];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *simpleTableIdentifier = @"VideosObject";
VideosObject *cell = (VideosObject *)[tableView dequeueReusableCellWithIdentifier:simpleTableIdentifier];
if (cell == nil)
{
NSArray *nib = [[NSBundle mainBundle] loadNibNamed:@"VideosObject" owner:self options:nil];
cell = [nib objectAtIndex:0];
cell.selectionStyle = UITableViewCellSelectionStyleNone;
UIImageView *imageView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"Purple Sunrise Pattern iPhone 5 Wallpaper.png"]];
self.tableView.backgroundView = imageView;
}
NSDictionary *movie = [self.movies objectAtIndex:indexPath.row];
cell.title.text = [movie objectForKey:@"title"];
NSURL *url = [[NSURL alloc] initWithString:[movie objectForKey:@"link"]];
[cell.pic setImageWithURL:url placeholderImage:[UIImage imageNamed:@"placeholder"]];
return cell;
}
@end
4 个解决方案
#1
7
You can save the dictionary that you get after parsing the JSON:
您可以保存解析JSON后获得的字典:
NSDictionary *result = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers error:&error];
[[NSUserDefaults standardUserDefaults] setObject:result forKey:@"myJSONParsed"];
And to get it back:
并把它拿回来:
NSDictionary *myJSON = [[NSUserDefaults standardUserDefaults] objectforKey:@"myJSONParsed"];
#2
0
try this code for storing parsed json in nsuserdefaults
尝试使用此代码在nsuserdefaults中存储已解析的json
NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:@"link"]];
AFJSONRequestOperation *operation = [AFJSONRequestOperation JSONRequestOperationWithRequest:request
success:^(NSURLRequest *request, NSHTTPURLResponse *response, id JSON) {
NSDictionary *jsonDict = (NSDictionary *) JSON;
self.movies = [jsonDict objectForKey:@"putYourKey"];
//here is the way to add parsed array to NSUserDefaults
[NSUserDefaults standardUserDefaults] setObject:self.movies forKey:@"moviesArray"];
[[NSUserDefaults standartUserDefaults] synchronize];
} failure:^(NSURLRequest *request, NSHTTPURLResponse *response,
NSError *error, id JSON) {
NSLog(@"Request Failure Because %@",[error userInfo]);
}
];
[operation start];
#3
0
After setting value to NSUserDefaults you should to synchronize it:
将值设置为NSUserDefaults后,您应该同步它:
[[NSUserDefaults standardUserDefaults] setObject:someObject forKey:@"someKey"];
[[NSUserDefaults standardUserDefaults] synchronize];
And when you need to access to saved data just get it from defaults for your key:
当您需要访问已保存的数据时,只需从密钥的默认值中获取:
[[NSUserDefaults standardUserDefaults] objectForKey:@"someKey"];
#4
0
Write this code from where you are getting url data
从您获取网址数据的位置编写此代码
NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
username = [[response valueForKey:@"Login"]valueForKey:@"name"];
[defaults setObject:username forKey:@"name"];
In this method retrieve the data:
在此方法中检索数据:
- (void)viewDidLoad
{
defaults = [NSUserDefaults standardUserDefaults];
Musrname = [defaults objectForKey:@"name"];
}
#1
7
You can save the dictionary that you get after parsing the JSON:
您可以保存解析JSON后获得的字典:
NSDictionary *result = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers error:&error];
[[NSUserDefaults standardUserDefaults] setObject:result forKey:@"myJSONParsed"];
And to get it back:
并把它拿回来:
NSDictionary *myJSON = [[NSUserDefaults standardUserDefaults] objectforKey:@"myJSONParsed"];
#2
0
try this code for storing parsed json in nsuserdefaults
尝试使用此代码在nsuserdefaults中存储已解析的json
NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:@"link"]];
AFJSONRequestOperation *operation = [AFJSONRequestOperation JSONRequestOperationWithRequest:request
success:^(NSURLRequest *request, NSHTTPURLResponse *response, id JSON) {
NSDictionary *jsonDict = (NSDictionary *) JSON;
self.movies = [jsonDict objectForKey:@"putYourKey"];
//here is the way to add parsed array to NSUserDefaults
[NSUserDefaults standardUserDefaults] setObject:self.movies forKey:@"moviesArray"];
[[NSUserDefaults standartUserDefaults] synchronize];
} failure:^(NSURLRequest *request, NSHTTPURLResponse *response,
NSError *error, id JSON) {
NSLog(@"Request Failure Because %@",[error userInfo]);
}
];
[operation start];
#3
0
After setting value to NSUserDefaults you should to synchronize it:
将值设置为NSUserDefaults后,您应该同步它:
[[NSUserDefaults standardUserDefaults] setObject:someObject forKey:@"someKey"];
[[NSUserDefaults standardUserDefaults] synchronize];
And when you need to access to saved data just get it from defaults for your key:
当您需要访问已保存的数据时,只需从密钥的默认值中获取:
[[NSUserDefaults standardUserDefaults] objectForKey:@"someKey"];
#4
0
Write this code from where you are getting url data
从您获取网址数据的位置编写此代码
NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
username = [[response valueForKey:@"Login"]valueForKey:@"name"];
[defaults setObject:username forKey:@"name"];
In this method retrieve the data:
在此方法中检索数据:
- (void)viewDidLoad
{
defaults = [NSUserDefaults standardUserDefaults];
Musrname = [defaults objectForKey:@"name"];
}