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?
This question is related to
iphone
objective-c
string
int
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]];
You can just convert the string like that [str intValue] or [str integerValue]
integerValue Returns the NSInteger value of the receiver’s text.
for more information refer here
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.
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:@""];\
__string_copy = [__string_copy stringByReplacingOccurrencesOfString:__locale.decimalSeparator withString:@"."];\
return @([__string_copy doubleValue]);\
})()\
)
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", &flags);
Source: Stackoverflow.com