Calling ViewDidAppear from numerous methods to update NSMutableDictionary data entries - ios

Question

I am fairly new to Objective C and am attempting to develop an app using Xcode5.
I am storing strings (either composed of numbers 1-9 or N/A) in a NSMutableDictionary.
When users get to the "Review your inputed results page" I want them to be able to manually go into a text field, delete the value present and retype their new value if necessary. However, I don't know how to reload this information into the system so that the new values will carry over into the email client, which basically sends the results to whatever email address the user wishes.
Currently, the values are being loaded using ViewDidAppear upon entering the UIView, but I think I need to call it again if, for example, textField1 is updated.
I have methods for all the textFields that are textField(insert correct number here)IsUpdated and inside those I want to store the new value to the NSMutableDictionary (which I believe I can already do).
The issue is I cannot figure out how to get the current version of the dictionary that was loaded upon entering the UIView to update so that the information in ViewDidAppear updates for the email.
Hope that made sense.
As I said, definitely new to Objective C.
Below is the viewDidAppear method.
-(void)viewDidAppear:(BOOL)animated
{
[super viewDidAppear:(BOOL)animated];
AppDelegate *app = (AppDelegate *) [[UIApplication sharedApplication] delegate];
NSMutableDictionary *results = [app results];
NSString *firstResult = [results valueForKey:#"first"];
NSString *secondResult = [results valueForKey:#"second"];
NSString *thirdResult = [results valueForKey:#"third"];
if ([firstResult isEqual: #"N/A"]) {
self.Result1.text = results[#"first"];
} else {
int firstResultInt = [firstResult intValue]; firstResultInt++;
[_Result1 setText:[NSString stringWithFormat:#"%i", firstResultInt]];
}
if ([secondResult isEqual: #"N/A"]) {
self.Result2.text = results[#"second"];
} else {
int secondResultInt = [secondResult intValue]; secondResultInt++;
[_Result2 setText:[NSString stringWithFormat:#"%i", secondResultInt]];
}
if ([thirdResult isEqual: #"N/A"]) {
self.Result3.text = results[#"third"];
} else {
int thirdResultInt = [thirdResult intValue]; thirdResultInt++;
[_Result3 setText:[NSString stringWithFormat:#"%i", thirdResultInt]];
}
self.diningResult.text = results[#"dining"];
self.basementResult.text = results[#"basement"];
self.atticResult.text = results[#"attic"];
self.carResult.text = results[#"car"];
self.hallwayResult.text = results[#"hallway"];
self.garageResult.text = results[#"garage"];
self.other1Result.text = results[#"other"];
self.other2Result.text = results[#"other1"];
self.other1Name.text = results[#"other1name"];
self.other2Name.text = results[#"other2name"];
NSMutableString * str = [NSMutableString new];
[str appendString:#"Bedroom: "];
if ([firstResult isEqual: #"N/A"]) {
[str appendString: firstResult];
} else {
int firstResultInt = [firstResult intValue]; firstResultInt++;
NSString *firstResultString = [NSString stringWithFormat:#"%d",firstResultInt];
[str appendString: firstResultString];
}
[str appendString:#"\n"];
[str appendString:#"Living Room: "];
if ([secondResult isEqual: #"N/A"]) {
[str appendString: secondResult];
} else {
int secondResultInt = [secondResult intValue]; secondResultInt++;
NSString *secondResultString = [NSString stringWithFormat:#"%d",secondResultInt];
[str appendString: secondResultString];
}
[str appendString:#"\n"];
[str appendString:#"Kitchen: "];
if ([thirdResult isEqual: #"N/A"]) {
[str appendString: thirdResult];
} else {
int thirdResultInt = [thirdResult intValue]; thirdResultInt++;
NSString *thirdResultString = [NSString stringWithFormat:#"%d",thirdResultInt];
[str appendString: thirdResultString];
}
[str appendString:#"\n"];
[str appendString:#"Dining:"];
[str appendString:self.diningResult.text];
[str appendString:#"\n"];
//Code goes on to do the same with all other fields. all strings led by "str" get transferred over to the email
self.emailString = [NSString stringWithString:str];
}

Answer 1

The code should not call viewDidAppear, it's the responsibility of the framework to call viewDidAppear at the appropriate times. Instead, you should make a separate methods, e.g. UpdateMailContents and UpdateTextFields. Then call those methods from viewDidAppear, and call UpdateMailContents from the textFieldDidEndEditing method of the UITextFieldDelegate protocol.