2014-12-07 85 views
0

我正在构建一个应用程序(UITabBar),我在那里存储自定义对象的NSMutableArray。我的自定义对象叫做DayModelUITableViewController没有正确刷新

我DayModel.h文件:

#import <Foundation/Foundation.h> 

@interface DayModel : NSObject 

@property (nonatomic, retain) NSDate *mydate; 
@property (nonatomic) float myFloat; 

@end 

我DayModel.m文件:

#import "DayModel.h" 

@implementation DayModel 

@synthesize myDate, myFloat; 

-(id)init { 
// Init self 
self = [super init]; 
if (self) { 
    // Setup 
} 
return self; 
} 

- (void)encodeWithCoder:(NSCoder *)coder; 
{ 
[coder encodeObject:self.myDate forKey:@"myDate"]; 
[coder encodeObject:self.myFloat forKey:@"myFloat"]; 
} 

- (id)initWithCoder:(NSCoder *)coder; 
{ 
self = [[DayModel alloc] init]; 
if (self != nil) 
{ 
    self.myDate = [coder decodeObjectForKey:@"myDate"]; 
    self.myFloat = [coder decodeFloatForKey:@"myFloat"]; 
} 
return self; 
} 

@end 

“主” 视图控制器,节省了新的对象:

// Add data to the DayModel class 
DayModel *currentDay = [[DayModel alloc] init]; 
currentDay.myDate = myDate; 
currentDay.myFloat = myFloat; 

// Add currentDay to the _objects NSMutableArray 
[_objects insertObject:currentDay atIndex:0]; 

// Save this array using NSKeyedArchiver 
[[NSUserDefaults standardUserDefaults] setObject:[NSKeyedArchiver archivedDataWithRootObject:_objects] forKey:@"objects"]; 

我的UITableViewController显示此:

viewWillAppear中

// Load the _objects array 
NSData *objectsData = [defaults objectForKey:@"objects"]; 
if (objectsData != nil) 
{ 
    NSArray *oldArray = [NSKeyedUnarchiver unarchiveObjectWithData:objectsData]; 
    if (oldArray != nil) 
    { 
     _objects = [[NSMutableArray alloc] initWithArray:oldArray]; 
    } else 
    { 
     _objects = [[NSMutableArray alloc] init]; 
    } 
} else 
{ 
    _objects = [[NSMutableArray alloc] init]; 
} 

其它方法:

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView { 
// Return the number of sections. 
return 1; 
} 

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section { 
// Return the number of rows in the section. 
return [_objects count]; 
} 

加载数据:

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { 
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"cell" forIndexPath:indexPath]; 

// Get the DayModel 
DayModel *currentModel = [[DayModel alloc] init]; 
currentModel = _objects[indexPath.row]; 

// Get the UILabels 
UILabel *dateLabel = (UILabel *)[cell viewWithTag:10]; 
UILabel *floatLabel = (UILabel *)[cell viewWithTag:20]; 

// Create the DateFormatter 
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init]; 
[dateFormatter setDateFormat:@"dd-MM-yyyy"]; 

// Set the text 
dateLabel.text = [dateFormatter stringFromDate:currentModel.myDate]; 
floatLabel.text = [NSString stringWithFormat:@"%.02f", currentModel.myFloat]; 

return cell; 
} 

再现该问题:

  • 甲dd item from tab nr 1
  • 转到第2个标签(表格)。数据显示正确
  • 转到标签页1并添加新对象
  • 转到标签页2(表格)。新项目会显示来自预览项目的数据,而不是新数据。

当应用程序重新加载时,表格显示正确。

编辑

什么情况是,该新项目将在索引0加入到出现在列表的顶部,而实现代码如下类GET是从时,它应该得到它的最后一排新的信息从一开始。我怎样才能“扭转”这一点?

谢谢! Erik

回答

0

我通过重新加载整个列表来修复它,不仅添加了新项目。这段代码正在从NSUserDefaults(viewWillAppear)加载列表中。

// Reload the UITableView completely 
[self.tableView reloadData]; 

请告诉我,如果有一个更好的解决办法:)