iOS Small Demo The judge whether the string has spaces and removes the spaces in the string

To determine whether a string has spaces

-(BOOL) ishaveemptystring: (NSString *) string {

Nsrange range = [str rangeofstring:@ "];

if (range.location!= nsnotfound) {

return YES;

}

else {

return NO;

}

}

To determine whether a string is a full space

-(BOOL) isemptystring: (NSString *) string {

if (!string)

{

Returntrue;

} else

{

Nscharacterset *set = [Nscharacterset whitespaceandnewlinecharacterset];

NSString *isstring = [string Stringbytrimmingcharactersinset:set];

if ([isstring length] = = 0)

{

Returntrue;

} else

{

Returnfalse;

}

}

}

Replace a space in a string

NSString *string= [oldstring stringbyreplacingoccurrencesofstring:@ "" withstring:@ "];