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UITextField *textField;
UISwitch *someSwitch;
NSManagedObject *editedObject;
NSString *editedFieldKey;
NSString *editedFieldName;
NSString *z=[NSString stringWithFormat:@"%@",[editedObject valueForKey:editedFieldKey]];
NSString *y=[NSString stringWithFormat:@"b"];
if(z==y){
[someSwitch setOn:YES animated:YES];
}
else{[someSwitch setOn:NO animated:YES];}
-(IBAction) toggleButtonPressed{
NSString *a=[NSString stringWithFormat:@"a"];
NSString *b=[NSString stringWithFormat:@"b"];
if(someSwitch.on){
[editedObject setValue:b forKey:editedFieldKey];
}
else{
[editedObject setValue:a forKey:editedFieldKey];
}
}
-(IBAction)save {
NSUndoManager * undoManager = [[editedObject managedObjectContext] undoManager];
[undoManager setActionName:[NSString stringWithFormat:@"%@", editedFieldName]];
if (editingName){
[editedObject setValue:textField.text forKey:editedFieldKey];
}else{
[self toggleButtonPressed];
}
[self.navigationController popViewControllerAnimated:YES];
}
我无法让UISwitch在核心数据和详细视图控制器的上下文中工作。当你在核心数据中创建一个BOOL,然后在xcode中创建相应的类时,它会生成一个NSNumber。这很好,但是当数据被保存和调用时,它不会产生“0”和“1”,而会产生非常大的整数(7-8位)。我上面做的是将信息存储为二进制字符串,使用“a”或“b”作为字符串存储。这个效果不好,主要是因为我无法使用UISwitch加载之前存储的值(打开或关闭)。我确信之前已经处理过这个问题,但我在网上找不到很多文档。如果有任何想法或建议,相对于上面的代码,请告诉我。谢谢。UISwitch核心数据
2011-12-06 15:49:41.042 sampNav[820:207] 101783056
2011-12-06 15:49:41.043 sampNav[820:207] 80887600
- (IBAction)save {
NSUndoManager * undoManager = [[editedObject managedObjectContext] undoManager];
[undoManager setActionName:[NSString stringWithFormat:@"%@", editedFieldName]];
if (editingName){
[editedObject setValue:textField.text forKey:editedFieldKey];
}else{
[self toggleButtonPressed];
}
[self.navigationController popViewControllerAnimated:YES];
}
-(IBAction) toggleButtonPressed{
if (someSwitch.on==YES)
{
[editedObject setValue:[NSNumber numberWithInt:1] forKey:editedFieldKey];
NSLog(@"%d",[editedObject valueForKey:editedFieldKey]);
}
else [editedObject setValue:[NSNumber numberWithInt:0] forKey:editedFieldKey];
NSLog(@"%d",[editedObject valueForKey:editedFieldKey]);
}
问题是,当这些值被存储为对象的NSNumber的值是大的整数。 NSLog被列在最顶端。任何人都可以解释吗?