如何从NSDocumentDirectory获取属性列表的数据？

Question

这是一个 tutorial 如何从

NSDictionary *dictRoot = [NSDictionary dictionaryWithContentsOfFile:[[NSBundle mainBundle]pathForResource:@"TestPlist" ofType:@"plist"]];

文档中读取文件？

NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);

完整代码：

#import "ViewController.h"

@interface ViewController () {
    NSMutableArray *subjectList;
    NSMutableArray *contentList;
}

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    
    subjectList = [[NSMutableArray alloc]init];
    contentList = [[NSMutableArray alloc]init];
    
    NSDictionary *dictRoot = [NSDictionary dictionaryWithContentsOfFile:[[NSBundle mainBundle]pathForResource:@"TestPlist" ofType:@"plist"]];
    NSArray *arrayList = [NSArray arrayWithArray:[dictRoot objectForKey:@"Data"]];
    [arrayList enumerateObjectsUsingBlock:^(id obj, NSUInteger index, BOOL *stop) {
             [subjectList addObject:[obj valueForKey:@"Title"]];
             [contentList addObject:[obj valueForKey:@"Content"]];
        }];
}


- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
    return [subjectList count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
    static NSString *simpleTableIdentifier = @"SimpleTableItem";
    
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:simpleTableIdentifier];
    
    if(cell == nil) {
        cell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:simpleTableIdentifier];
    }
    
    cell.textLabel.text = [subjectList objectAtIndex:indexPath.row];
    cell.detailTextLabel.text = [contentList objectAtIndex:indexPath.row];
    
    return cell;
    
}
@end

我该怎么做？预先感谢:(

Answer 1

已解决

解决方案后的完整代码：

#import "ViewController.h"

@interface ViewController () {
    NSMutableArray *subjectList;
    NSMutableArray *contentList;
}

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    
    subjectList = [[NSMutableArray alloc]init];
    contentList = [[NSMutableArray alloc]init];
    
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *documentsDirectory = [paths firstObject];
    NSString *path = [documentsDirectory stringByAppendingPathComponent:@"TestPlist.plist"];
    
    NSURL *aUrl=[NSURL fileURLWithPath:path];
    NSDictionary *aDict=[[NSDictionary alloc] initWithContentsOfURL:aUrl];
    
    NSLog(@"%@", path);
    
        NSArray *arrayList = [NSArray arrayWithArray:[aDict objectForKey:@"Data"]];
    [arrayList enumerateObjectsUsingBlock:^(id obj, NSUInteger index, BOOL *stop) {
             [subjectList addObject:[obj valueForKey:@"Title"]];
             [contentList addObject:[obj valueForKey:@"Content"]];
   
        }];
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
    return [subjectList count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
    static NSString *simpleTableIdentifier = @"SimpleTableItem";
    
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:simpleTableIdentifier];
    
    if(cell == nil) {
        cell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:simpleTableIdentifier];
    }
    
    cell.textLabel.text = [subjectList objectAtIndex:indexPath.row];
    cell.detailTextLabel.text = [contentList objectAtIndex:indexPath.row];
    
    return cell;
    
}
@end