我有一个模块，可以根据文本字段中的用户输入保存数据，并将其添加到Parse中保存的数组中。使用预先填充的数据进行测试，模块工作正常。但是，如果我去添加以前没有任何数据的数据，它会导致应用程序一起忽略保存元素。将新数组添加到Parse的最佳方法是什么，以前没有数据存在？这是现有的代码：
- (IBAction)saveButton:(id)sender
{
[getData showGlobalProgressHUDWithTitle:@"Saving Test"];
PFQuery *tankQuery = [PFQuery queryWithClassName:@"WaterTests"];
[tankQuery whereKey:@"tankObjectId" equalTo:_passedValue];
[tankQuery findObjectsInBackgroundWithBlock:^(NSArray *objects, NSError *error) {
if (!error)
{
for (PFObject *object in objects)
{
calciumArray = [object valueForKey:@"calciumArray"];
nitrateArray = [object valueForKey:@"nitrateArray"];
phosArray = [object valueForKey:@"phosphateArray"];
salinityArray = [object valueForKey:@"salinityArray"];
alkArray = [object valueForKey:@"alkArray"];
phArray = [object valueForKey:@"phArray"];
tempArray = [object valueForKey:@"tempArray"];
[calciumArray addObject: addCalcium.text];
[nitrateArray addObject: addNitrate.text];
[phosArray addObject: addPhosphate.text];
[salinityArray addObject: addSalinity.text];
[alkArray addObject: addAlk.text];
[phArray addObject: addPH.text];
[tempArray addObject: addTemp.text];
[object saveInBackgroundWithBlock:^(BOOL succeeded, NSError *error) {
if (!error)
{
NSLog(@"Something happened");
[getData dismissGlobalHUD];
[self hideTestView];
}
else
{
NSLog(@"Nothing happened: %@", error);
}
[self resignFirstResponder];
[_chartView reloadData];
}];
}
}
}];
}
我知道我已经关闭，但不太明白为什么它没有解雇保存代码。我相信它是因为我试图先找回空的物体，但我可能错了。有人对此有任何建议吗？
UPDATE 这是ViewDidLoad代码，因为它与检索数据有关。
- (void)viewDidLoad
{
self.title = @"Water Quality";
statQuery = [PFQuery queryWithClassName:@"WaterTests"];
[statQuery whereKey:@"tankObjectId" equalTo:_passedValue];
[statQuery findObjectsInBackgroundWithBlock:^(NSArray *objects, NSError *error)
{
if (!error)
{
for (PFObject *object in objects)
{
[statQuery whereKey:@"tankObjectId" equalTo:_passedValue];
calciumArray = [object valueForKey:@"calciumArray"];
_footerView.sectionCount = calciumArray.count;
NSLog(@"CALCIUM ARRAY: %@", calciumArray);
nitrateArray = [object valueForKey:@"nitrateArray"];
NSLog(@"NITRATE ARRAY: %@", nitrateArray);
phosArray = [object valueForKey:@"phosphateArray"];
NSLog(@"PHOSPHATE ARRAY: %@", phosArray);
salinityArray = [object valueForKey:@"salinityArray"];
NSLog(@"SALINITY ARRAY: %@", salinityArray);
alkArray = [object valueForKey:@"alkArray"];
NSLog(@"ALKALINITY ARRAY: %@", alkArray);
phArray = [object valueForKey:@"phArray"];
NSLog(@"PH ARRAY: %@", phArray);
tempArray = [object valueForKey:@"tempArray"];
NSLog(@"TEMPERATURE ARRAY: %@", tempArray);
}
}
if (calciumArray == nil || [calciumArray count] == 0)
{
NSLog(@"You should probably fire off the new test function here.");
[_chartView setUserInteractionEnabled:NO];
[self newTest:self];
NSLog(@"Error: %@", error);
}
}];
这是视图中唯一提及数据的时间。我在其他地方分配和初始化阵列，但我不认为考虑到现有阵列拉动并保存得很好的问题。
答案 0 :(得分：0)
(PFObject *object in objects)
{
calciumArray = [object valueForKey:@"calciumArray"];
.
.
. //Other object for array
[arrayMu] [calciumArray addObject: addCalcium.text]; //Add in NSMutableArray
.
.
.
[objects save]; //Instead of saveinbackground.
}
试一试。也请及时回复，因为经过很长一段时间后，我必须再次阅读您的所有查询，而不是与之联系。
... UPADTE
-(IBAction)updateButton:(id)sender
{
PFQuery *query = [PFQuery queryWithClassName:@"UserDetail"];
NSString *str =self.nameTextField.text;
[query whereKey:@"name" containsString:str];
[query getFirstObjectInBackgroundWithBlock:^(PFObject *object, NSError *error)
{
if (!error)
{
NSLog(@"Successfully retrieved: %@", [object objectId]); //I retrieve the object succesfully
object[@"job"] = self.jobTextField.text; //Made changes to it.
object[@"hobby"] = self.hobbyTextField.text;
[object saveInBackground]; //Again saved it in background
}
else
{
NSLog(@"Error: %@", [error localizedDescription]);
} }];
}
然后我检查了我的解析数据库，我的数据被修改了。
答案 1 :(得分：0)
如果没有其他可用的东西可以通过向Parse明显添加新对象，我能够从单个对象中正确添加一个新数组：
- (IBAction)saveButton:(id)sender
{
[getData showGlobalProgressHUDWithTitle:@"Saving Test"];
PFQuery *tankQuery = [PFQuery queryWithClassName:@"WaterTests"];
[tankQuery whereKey:@"tankObjectId" equalTo:_passedValue];
PFObject *testObject = [[PFObject alloc] initWithClassName:@"WaterTests"];
[tankQuery findObjectsInBackgroundWithBlock:^(NSArray *objects, NSError *error) {
if (objects.count == 0)
{
[testObject setObject:_passedValue forKey:@"tankObjectId"];
[testObject addObject:addCalcium.text forKey:@"calciumArray"];
[testObject addObject:addNitrate.text forKey:@"nitrateArray"];
[testObject addObject:addPhosphate.text forKey:@"phosphateArray"];
[testObject addObject:addSalinity.text forKey:@"salinityArray"];
[testObject addObject:addAlk.text forKey:@"alkArray"];
[testObject addObject:addPH.text forKey:@"phArray"];
[testObject addObject:addTemp.text forKey:@"tempArray"];
[testObject saveInBackgroundWithBlock:^(BOOL succeeded, NSError *error) {
if (!error)
{
[getData dismissGlobalHUD];
[self hideTestView];
NSLog(@"Something, somewhere, saved.");
}
else
{
NSLog(@"HOORAY ERROR: %@", error);
}
[_chartView reloadData];
}];
}
但是，我还必须检查是否有任何对象开始。如果没有，只需将它们添加到新的中即可。如果有的话，我必须运行代码来查询数据库，并为使用给定条件找到的每个对象添加for循环：
else if (objects.count != 0)
{
for (PFObject *object in objects)
{
[object addObject:addCalcium.text forKey:@"calciumArray"];
[object addObject:addNitrate.text forKey:@"nitrateArray"];
[object addObject:addPhosphate.text forKey:@"phosphateArray"];
[object addObject:addSalinity.text forKey:@"salinityArray"];
[object addObject:addAlk.text forKey:@"alkArray"];
[object addObject:addPH.text forKey:@"phArray"];
[object addObject:addTemp.text forKey:@"tempArray"];
[object saveInBackgroundWithBlock:^(BOOL succeeded, NSError *error)
{
if (!error)
{
[getData dismissGlobalHUD];
[self hideTestView];
[_chartView reloadData];
NSLog(@"Here we go again");
}
}];
}
}
}];
}
我将此作为我自己的答案提交给社区维基，以帮助其他人解决类似的问题。问题：已解决！