iosxcodensuinteger

%lu and %u both give me warnings....

Hi I get this warning when using %lu:

"format specifies type unsigned long but the argument has type unsigned int."

then when i replace to %u: the warning changes to:

"format specifies type unsigned int but the argument has type unsigned long."

here is my code:

NSString *viewName_ = [NSString stringWithFormat:@"myGreatView%lu", currentTagLoadedOnView-99];

where currentTagLoadedOnView: 

NSUInteger currentTagLoadedOnView;

any help greatly appreciated....

Solution

  • Try any one of the below

    1) Use both as unsigned int

    NSString *viewName_ = [NSString stringWithFormat:@"myGreatView%u", currentTagLoadedOnView-99];

    and declare currentTagLoadedOnView as NSUInteger currentTagLoadedOnView;

    2) type cast to unsigned long

    NSString *viewName_ = [NSString stringWithFormat:@"myGreatView%lu", (unsigned long) currentTagLoadedOnView-99];

    and declare currentTagLoadedOnView as NSUInteger currentTagLoadedOnView;

    3) Defined unsinged long as both

    NSString *viewName_ = [NSString stringWithFormat:@"myGreatView%lu", (unsigned long) currentTagLoadedOnView-99];

    and declare currentTagLoadedOnView as unsigned long currentTagLoadedOnView;

    Note: Your warning will disappear if you use 64-bit architecture only(make changes to consistent data type) or 32-bit only(no change). If you use Standard architecture(including 64-bit), it will give this warning.