ObjectiveC Parse Integer from String

Question

I m trying to extract a string  which contains an integer  from an array and then use it as an int in a function  I m trying to convert it to a int using intValue   Here s the code I ve been trying     NSArray   returnedArguments    serverOutput componentsSeparatedByString            appDelegate loggedIn usernameField text passwordField text  int    returnedArguments objectAtIndex 2  intValue      I get this error      passing argument 3 of  loggedIn     makes pointer from integer   without a cast   What s wrong

User · Answer

NSArray   returnedArguments    serverOutput componentsSeparatedByString           returnedArguments is an array of NSStrings which the UITextField text property is expecting  No need to convert    Syntax error     appDelegate loggedIn usernameField text passwordField text  int    returnedArguments objectAtIndex 2  intValue      If your  appDelegate has a passwordField property  then you can set the text using the following     appDelegate passwordField  setText   returnedArguments objectAtIndex 2

User · Answer

You can just convert the string like that  str intValue  or  str integerValue   integerValue Returns the NSInteger value of the receiver   s text     NSInteger integerValue Return Value The NSInteger value of the receiver   s text  assuming a decimal representation and skipping whitespace at the beginning of the string  Returns 0 if the receiver doesn   t begin with a valid decimal text representation of a number    for more information refer here

User · Answer

Basically  the third parameter in loggedIn should not be an integer  it should be an object of some kind  but we can t know for sure because you did not name the parameters in the method call  Provide the method signature so we can see for sure  Perhaps it takes an NSNumber or something

User · Answer

I really don t know what was so hard about this question  but I managed to do it this way    myStringContainingInt intValue    It should be noted that you can also do   myStringContainingInt intValue

User · Answer

Keep in mind that international users may be using a decimal separator other than   in which case values can get mixed up or just become nil when using intValue on a string  For example  in the UK 1 23 is written 1 23  so the number 1 777 would be input by user as 1 777  which  as  intValue  will be 1777 not 1  truncated    I ve made a macro that will convert input text to an NSNumber based on a locale argument which can be nil  if nil it uses device current locale    define stringToNumber   string    nullable locale       NSNumber   void    NSLocale    locale     nullable locale   if     locale       locale    NSLocale currentLocale       NSString    string copy      string stringByReplacingOccurrencesOfString   locale groupingSeparator withString   quot  quot       string copy      string copy stringByReplacingOccurrencesOfString   locale decimalSeparator withString   quot   quot     return      string copy doubleValue

User · Answer

If I understood you correctly  you need to convert your NSString to int  Try this peace of code   NSString  stringWithNumberInside     returnedArguments objectAtIndex 2   int number  sscanf  stringWithNumberInside UTF8String     x    amp flags

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