How do I make the following script repeat the text input into it?
self.textView.text = self.userTextInput
The above script was written as a text input from a ViewController but I want it to loop 10 times in its text viewer, how do I write that?
thanks.
Use following code to get your desired result.
NSMutableString *teststring = [NSMutableString string];
for(int i = 0; i<10;i++)
{
[teststring appendString:self.userTextInput];
}
self.textView.text = teststring;
Related
Here's my program so far. My intention is to have it so the if statement compares the letter in the string letterGuessed to a character in the string userInputPhraseString. Here's what I have. While coding in xCode, I get an "expected '['"error. I have no idea why.
NSString *letterGuessed = userInputGuessedLetter.text;
NSString *userInputPhraseString = userInputPhraseString.text;
int loopCounter = 0;
int stringLength = userInputPhraseString.length;
while (loopCounter < stringLength){
if (guessedLetter isEqualToString:[userInputPhraseString characterAtIndex:loopIndexTwo])
{
//if statement true
}
loopCounter++;
}
You are missing enclosing square brackets on this line:
if (guessedLetter isEqualToString:[userInputPhraseString characterAtIndex:loopIndexTwo])
It should be:
if ([guessedLetter isEqualToString:[userInputPhraseString characterAtIndex:loopIndexTwo]])
Edit that won’t fix your problem, though, because characterAtIndex: returns a unichar, not an NSString.
It's not clear what you are trying to do.. But I suppose that letterGuessed has one character... And that userInputPhraseString has many characters. So you want to know if letterGuessed is inside userInputPhraseString correct?
This is one solution without loops involved.. I replaced the input with fixed values for testing and tested the code.. It works.
NSString *letterGuessed = #"A"; //Change to your inputs
NSString *userInputPhraseString = #"BBBA"; //Since it has A it will be true in the test
NSCharacterSet *cset = [NSCharacterSet characterSetWithCharactersInString:letterGuessed];
NSRange range = [userInputPhraseString rangeOfCharacterFromSet:cset];
if (range.location != NSNotFound) { //Does letterGuessed is in UserInputPhraseString?
NSLog(#"YES"); //userInput Does contain A...
} else {
NSLog(#"NO");
}
In regards to your code... I fixed a couple of errors, first you are trying to get a UniChar (Integer) value for the character and want to compare it to a NSString which is an Object. Also fixed a couple of issues with syntax you had and used the right approach which is to return a range of characters. Again for doing what you want to accomplish the example above is the best approach I know, but for the sake of learning, here is your code fixed.
NSString *letterGuessed = #"A"; //Change to your inputs
NSString *userInputPhraseString = #"BBBA"; //Since it has A it will be true in the test
NSInteger loopCounter = 0; //Use NSInteger instead of int.
NSInteger stringLength = userInputPhraseString.length;
BOOL foundChar = NO; //Just for the sake of returning NOT FOUND in NSLOG
while (loopCounter < stringLength){
//Here we will get a letter for each iteration.
NSString *scannedLetter = [userInputPhraseString substringWithRange:NSMakeRange(loopCounter, 1)]; // Removed loopCounterTwo
if ([scannedLetter isEqualToString:letterGuessed])
{
NSLog(#"FOUND CHARACTER");
foundChar = YES;
}
loopCounter++;
}
if (!foundChar) NSLog(#"NOT FOUND");
NSRange holds the position, length.. So we move to a new position on every iteration and then get 1 character.
Also if this approach is what you want, I would strongly suggest a for-loop.
I'm trying to make a game with 2 views, the first view has buttons which segues to another view. Depending on the segue identifier, it loads an image which the player has to guess.
I also have a an array which lists hints for the 4 images.
With the array, i made a button which shows the hints on the view, but the problem I have right now is that I don't know how to set the correct array to the image/puzzle.
A code that works right now is this:
if ([self.thePuzzle.name isEqual: #"lion"])
{
NSArray *hints = [lines[0] componentsSeparatedByString:#" "];
self.hintLabel.text = hints[0];
}
But after adding another line for the second image/puzzle, the app crashes.
2nd UPDATE: code that crashes
After entering this code
if ([self.thePuzzle.name isEqual: #"penguin"])
{
NSArray *hints = [lines[1] componentsSeparatedByString:#" "];
self.hintLabel.text = hints[1];
}
The hint button works for the 1st code, which has the lion picture, while the second part of the code, for the penguin pic, crashes when the Hint button is pressed.
3rd Update: Additional information
I made xcode access a file from the internet which contained the words for my array.
This is how i coded it.
[super viewDidLoad];
// Do any additional setup after loading the view.
self.imageView.image = [UIImage imageNamed:self.thePuzzle.imgFileName];
NSString *urlString = #"http://m.uploadedit.com/b032/1395295852132.txt";
NSString *contents = [TextFileManager readStringFromURL:urlString];
//parse contents
lines = [contents componentsSeparatedByString:#"\n"];
for( int i = 0; i < lines.count; i++)
{
NSString *line = lines[i];
NSLog(#"%d: %#", i, line);
}
I'm fooling around in XCode, trying to learn a little about the iOS SDK and Objective-C.
I have this for loop below, and it should print out several values to the screen (depending on the amount of months chosen), but instead, it's only printing out the final value.
Can anybody point out why?
Thanks a bunch, in advance!
for (int i = 1; i <= myMonthsDouble; i++)
{
myPaymentAmount = (myBalanceDouble/10) + myInterestDouble;
myBalanceDouble -= myPaymentAmount;
//convert myPaymentAmount double into string named myPaymentAmountString
NSString *myPaymentAmountString = [NSString stringWithFormat:#"%f", myPaymentAmount];
NSString *paymentInformation = [[NSString alloc] initWithFormat:#"%# months, %# per month.", monthsString, myPaymentAmountString];
myInterestDouble = (myBalanceDouble * (myInterestDouble/100))/12;
self.label.text = paymentInformation;
}
It is only printing the last value to the screen because you only have one label. Each time you get to the end of the loop, you are setting that label's text which is overriding the last value. If you want to print all of them to the screen, you will need to have either multiple labels or you will have to append the strings together and put them in either a label or a UITextView that is formatted so that they can all be seen (most likely a text view but it can be done with a label.)
One example of doing this would be:
label.text = [label.text stringByAppendingString:newString];
numLines++; //this starts at 0;
and then at the end:
label.numberOfLines = numLines;
I have two textFields where the user types into some words.
Then, when pressing a button, i want the words to randomize and then the user displays the randomized result.
I have this code:
-(IBAction) randomInp{
NSString *first = firstField.text;
NSString *second = secondField.text;
NSString *result = //here it should randomize the words
//Display randomized word
textview.text = //should display result
}
where firstField and secondField are respectively the first and the second UITextFields. Then i don't know how to proceed!
I was thinking of set a switch condition. If it's 0 then returns *first, if it's 1 then returns *second. Am i right?
Any help appreciated
EDIT
Solved!
If anyone needs:
-(IBAction) randomInp{
NSString *first = firstField.text;
NSString *second = secondField.text;
int text = rand() % 2;
switch (text) {
case 0:
textview.text = first;
break;
case 1:
textview.text = second;
break;
default:
break;
}
}
EDIT 2
The answer that SSteve gave works great, too! For anyone who needs:
NSString *result = random() & 1 ? first : second;
To choose between two values you can use random() and check the value of a bit:
NSString *result = random() & 1 ? first : second;
Put a call to srandomdev() somewhere in your initialization code to avoid having the same sequence of values every time your program runs. You may also need #include <stdlib.h>
I have a variable name referencing question for the Objective C gurus out there.
Lets say I have 6 UILabels on a form, the are setup with properties naming them myLabel1 - myLabel6
I would like to go through a for loop and populate these with something depending on the loop but im unsure how to specifiy the for loops variable and make it part of the labels name.
Here is what I would like to do:
for (int LP = 0; i <5)
{
labelLP.text = [NSString stringWithFormat:#"My label number:%d", LP};
}
What im not sure of is how to reference the label and append the LP int and use it in my loop. I'm sure there is a way to do this just not sure how.. Anyone??
you can always take advantage of the dynamic runtime of objective-c:
id var = object_getIvar(self,class_getInstanceVariable([self class], [[NSString stringWithFormat:#"label%d",LP] UTF8String]));
http://developer.apple.com/library/mac/#documentation/Cocoa/Reference/ObjCRuntimeRef/Reference/reference.html
Whether one likes this approach is a question of style, but here's a way that should work:
for (int LP = 1; i <=6)
{
NSString *labelName = [NSString stringWithFormat: #"label%d", i];
UILabel *labelLP = (UILabel*)[self valueForKey: labelName];
labelLP.text = [NSString stringWithFormat:#"My label number:%d", LP};
}
I don't think you can create variable names on the fly, at least not trivially.
You could always use a switch case inside your loop:
for (int i=0; i<5; i++) {
switch(i) {
case 1:
myLabel1.text = [NSString stringWithFormat:#"My label number: %d", i];
break;
case 2:
myLabel2.text = [NSString stringWithFormat:#"My label number: %d", i];
break;
...
...
}
}
You could also store your labels in an array, and loop through that array.
The important point is not to get fixated about the variable names, but to think about why you need your objects and how to get them.