I have four separate UITextFields and I want to add the numerical value of them all and then display the content within a UILabel, below is current code:
- (void)updateString {
self.string1 = textField1.text;
self.string2 = textField2.text;
self.string3 = textField3.text;
self.string4 = textField4.text;
self.string5 = textField5.text;
label.text = self.total; // total is an NSString and label is a UILabel
}
I am unable to add together the numerical values within each textField1/2/3... and store the value within total and then update the label. Any suggestions?
NSString has a method on it -intValue. That is what you want to use.
Check the section "Getting Numeric Values" in the NSString documentation
int totalValue = [textField1.text intValue] + [textField2.text intValue]...;
label.text = [NSString stringWithFormat:#"The total value is %d", totalValue];
Related
I want to change a UILabel with strings based on an array. Here is what I have so far:
- (IBAction) sliderValueChanged:(UISlider *)sender {
scanLabel.text = [NSString stringWithFormat:#" %.f", [sender value]];
NSString *wholeText = #"Very Bad";
self.scanLabel.text = wholeText;
}
Instead of just "Very Bad," I want different values to show "very Bad, Bad, Okay, Good, Very Good."
Where do I declare the NSMutableArray, and how do I implement it with the slider?
Update: Thank you all for your help! (I love stackoverflow)
This is not compiler checked...but you may get some idea.
NSArray *texts=[NSArray arrayWithObjects:#"very Bad", #"Bad", #"Okay", #"Good", #"Very Good",nil];
NSInteger sliderValue=[sender value]; //make the slider value in given range integer one.
self.scanLabel.text=[texts objectAtIndex:sliderValue];
You declare it in the same class as the above method.
Let's say it's called wholeTexts.
The code will look like this:
- (IBAction) sliderValueChanged:(UISlider *)sender {
scanLabel.text = [NSString stringWithFormat:#" %.f", [sender value]];
NSString *wholeText = [wholeTexts objectAtIndex:(wholeTexts.count - 1) * (int)(sender.value - sender.minimumValue)/(sender.maximumValue - sender.minimumValue)];
self.scanLabel.text = wholeText;
}
Put your text values into an array
NSArray* array = #[#"very Bad", #"Bad", #"Okay", #"Good", #"Very Good"];
set your slider to have a min value of 0 and maximum value of 4
turn your [sender value] into an int, eg floor([sender value])
pick an item from the array using your int, eg
NSString* result = [array objectAtIndex:myInt];
You can implement the array anywhere you want, as long as it's created before you need to use the slider. Sliders can only have a value between 0 and 1 in iOS, so you'll need to multiply the value by something to get numbers as high as the number of items in your array (minus 1), and you'll need to convert them to an integer, so you can use that value as the index into the array. Something like this:
- (IBAction) sliderValueChanged:(UISlider *)sender {
scanLabel.text = [myArray objectAtIndex:(int)(sender.value * 10)];
}
I am building a UITabledetail view, which contains a stepper and a UILabel.
The uilabel will show the number of stepper pressed.
My problem comes when i used core data to save the value of the uilabel. e.g. the final value of the uilabel is 30.
When i load back the data, the uilabel showed 30 but, when i press the stepper again, the uilabel reset to 1 again.
Is there any way to make the stepper continue to count based on my saved value?
Below is my code.
- (IBAction)stepperValueChanged:(id)sender
{
double stepperValue = ourStepper.value;
self.label.text = [NSString stringWithFormat:#"%.f", stepperValue];
}
- (IBAction)stepperValueChanged:(id)sender
{
NSString *tempString = [NSString stringWithFormat:#"30"];// you can pass here whatever data(stepper value) that you retrieve from core data...
double steppervalue = [tempString doubleValue];
double stepperValue = ourStepper.value+steppervalue;
self.label.text = [NSString stringWithFormat:#"%.f", stepperValue];
}
Hope, this will help you..
I have an UIView containing two UILabels, in order to display a string.
The first UILabel has a fixed size, and if the string is too long and can't hold in this UILabel, I want to display the maximum characters I can in the first UILabel, and display the rest of the string in the second UILabel.
But to make this, I must know the exact part of the string displayed in the first UILabel, which is not easy because of the randomness of the string and the linebreaks.
So, is there a way to get just the text displayed in the first UILabel, without the truncated part of the string?
if ([_infoMedia.description length] > 270) {
NSRange labelLimit = [_infoMedia.description rangeOfString:#" " options:NSCaseInsensitiveSearch range:NSMakeRange(270, (_infoMedia.description.length - 270))];
_descTop.text = [_infoMedia.description substringToIndex:labelLimit.location];
_descBottom.text = [_infoMedia.description substringFromIndex:(labelLimit.location+1)];
} else {
_descTop.text = _infoMedia.description;
_descBottom.text = #"";
}
Okay that's a late answer but maybe it could help someone. The code above is approximatively the solution I used in my app.
_descTop is my first label and _descBottom is the second label. 270 is a constant equivalent to a little less than the average maximum number of characters displayed in my first label, _descTop. I calculated it by hand, trying with many different strings, maybe there's a better way to do that but this worked not bad.
If the string I want to display (_infoMedia.description) is larger than 270 characters, I isolate the first 270 characters plus the end of the next word in the string (by searching the next space), in the case where the 270 characters limit would cut the string in the middle of a word. Then I put the first part of the string in my first label, and the second part in the second label.
If not, I only put the globality of the string in the first label.
I know that's a crappy solution, but it worked and I didn't found any better way to do that.
Following code might help you in getting what you want!!
//If you want the string displayed in any given rect, use the following code..
#implementation NSString (displayedString)
//font- font of the text to be displayed
//size - Size in which we are displaying the text
-(NSString *) displayedString:(CGSize)size font:(UIFont *)font
{
NSString *written = #"";
int i = 0;
int currentWidth = 0;
NSString *nextSetOfString = #"";
while (1)
{
NSRange range;
range.location = i;
range.length = 1;
NSString *nextChar = [self substringWithRange:range];
nextSetOfString = [nextSetOfString stringByAppendingString:nextChar];
CGSize requiredSize = [nextSetOfString sizeWithFont:font constrainedToSize:CGSizeMake(NSIntegerMax, NSIntegerMax)];
currentWidth = requiredSize.width;
if(size.width >= currentWidth && size.height >= requiredSize.height)
{
written = [written stringByAppendingString:nextChar];
}
else
{
break;
}
i++;
}
return written;
}
#end
I am relatively new to Objective C and need some array help.
I have a plist which contains a Dictionary and an NSNumber Array, with more arrays to
be added later on.
NSMutableDictionary *mainArray = [[NSMutableDictionary alloc]initWithContentsOfFile:filePath];
NSArray *scoresArray = [mainArray objectForKey:#"scores"];
I need to retrieve all the values from the array and connect them to 10 UILabels which
I've set up in interface builder. I've done the following to cast the NSNumber to a String.
NSNumber *numberOne = [scoresArray objectAtIndex:0];
NSUInteger intOne = [numberOne intValue];
NSString *stringOne = [NSString stringWithFormat:#"%d",intOne];
scoreLabel1.text = stringOne;
This seems a very long winded approach, I'd have to repeat the 4 lines above ten times to retrieve all the array values. Could I use a for loop to iterate through the array with all of the values converted to Strings at the output?
Any info would be greatly appreciated.
// create NSMutableArray* of score UILabel items, called "scoreLabels"
NSMutableArray *scoreLabels = [NSMutableArray arrayWithCapacity:10];
[scoreLabels addObject:scoreLabel1];
[scoreLabels addObject:scoreLabel2];
// ...
NSUInteger _index = 0;
for (NSNumber *_number in scoresArray) {
UILabel *_label = [scoreLabels objectAtIndex:_index];
_label.text = [NSString stringWithFormat:#"%d", [_number intValue]];
_index++;
}
EDIT
I'm not sure why you'd want to comment out _index++. I haven't tested this code, so maybe I'm missing something somewhere. But I don't see anything wrong with _index++ — that's a pretty standard way to increment a counter.
As an alternative to creating the scoreLabels array, you could indeed retrieve the tag property of the subviews of the view controller (in this case, UILabel instances that you add a tag value to in Interface Builder).
Assuming that the tag value is predictable — e.g., each UILabel from scoreLabel1 through scoreLabel10 is labeled with a tag equal to the values of _index that we use in the for loop (0 through 9) — then you could reference the UILabel directly:
// no need to create the NSMutableArray* scoreLabels here
NSUInteger _index = 0;
for (NSNumber *_number in scoresArray) {
UILabel *_label = (UILabel *)[self.view viewWithTag:_index];
_label.text = [NSString stringWithFormat:#"%d", [_number intValue]];
_index++;
}
The key to making that work is that the tag value has to be unique for the UILabel and must be something you can reference with -viewWithTag:.
The code above very simply assumes that the tag values are the same as the _index values, but that isn't required. (It also assumes the UILabel instances are subviews of the view controller's view property, which will depend on how you set up your interface in Interface Builder.)
Some people write functions that add 1000 or some other integer that allows you group types of subviews together — UILabel instances get 1000, 1001, and so on, and UIButton instances would get 2000, 2001, etc.
try using stringValue...
scoreLabel1.text = [(NSNumber *)[scoresArray objectAtIndex:0] stringValue];
Ok I have 8 labels and I want to loop through them but am having no luck.
This is what I have tried.
for (int i; i = 0; i < 10; i++)
{
double va = [varible1.text doubleValue] + i;
int j = 0 + I
label(j).text= [[NSString alloc]initWithFormat:#"%2.1f", va];
}
This errors out. My labels are named like this label0, label1, label2
Any help would be appreciated.
label(j) is NOT equivalent to label0, label1, etc.
You should create an NSArray of labels, then you can access them with [arrayOfLabels objectAtIndex:j]. If you're not sure what this means, please read the documentation about NSArray...
You should maybe add all your labels to a C array, probably in -viewDidLoad
UILabel* labels[] = { label0, label1, label2, ... };
(not entirely sure about the syntax)
and then access them like
labels[i].text = ...
By the way, I think you're leaking memory here:
labels[i].text = [[NSString alloc]initWithFormat:#"%2.1f", va];
initWithFormat: will return a string with a retain count of 1. labels[i].text will retain that value again. You should release the string after setting the label's text. I'd probably just autorelease it here:
labels[i].text = [[[NSString alloc]initWithFormat:#"%2.1f", va] autorelease];
or use stringWithFormat (which returns an autoreleased string):
labels[i].text = [NSString stringWithFormat:#"%2.1f", va];
for (UILabel *lbl in self.view.subviews)
{
[lbl setFont:[UIFont fontWithName:#"AppleGothic" size:22]];
}
it will change all the labels in your ViewController by just giving tags to labels.
If you cannot or do not want to put your labels in an array, you could iterate through the UIViews using the tag field as an index. You store the index numbers in them (either through IB or programatically) and then get each label using: (UIView *)viewWithTag:(NSInteger)tag.
See below (set theView to the view your labels reside in):
for (int i; i = 0; i < 10; i++)
{
double va = [varible1.text doubleValue] + i;
UILabel * label = [theView viewWithTag: i];
label.text= [[NSString alloc]initWithFormat:#"%2.1f", va];
}