iOS determines whether a string is a phone number, iOS determines whether a string is a string, and iOS determines whether a string is a purely numeric

#pragma regular match phone number

+ (BOOL) Isphonenumber: (NSString *) str

{

if ([str length] = = 0) {

uialertview* alert = [[Uialertview alloc] initwithtitle:@ "Prompt" message:@ "Please enter mobile number" Delegate:nil cancelbuttontitle:@ "OK" Otherbuttontitles:nil, nil];

[Alert show];

return NO;

}

NSString *regex = @ "^ ((13[0-9]) | ( 147) | (15[^4,\\d]) | (18[0,5-9])) \\d{8}$ ";

Nspredicate *pred = [Nspredicate predicatewithformat:@ "Self MATCHES%@", regex];

BOOL IsMatch = [pred evaluatewithobject:str];

if (!ismatch) {

uialertview* alert = [[Uialertview alloc] initwithtitle:@ "Prompt" message:@ "Please enter the correct mobile number" Delegate:nil cancelbuttontitle:@ " Determine "otherbuttontitles:nil, nil";

[Alert show];

return NO;

}

return YES;

}

is a string

+ (BOOL) isblankstring: (NSString *) string {

if (string = = Nil | | string = NULL | | [String isequal: @ "<null>]) {

return YES;

}

if ([String Iskindofclass:[nsnull class]]) {

return YES;

}

if ([[[String Stringbytrimmingcharactersinset:[nscharacterset Whitespacecharacterset]] length]==0) {

return YES;

}

return NO;

}

Whether the string is a purely numeric

+ (BOOL) ispurenumandcharacters: (NSString *) string

{

string = [string Stringbytrimmingcharactersinset:[nscharacterset decimaldigitcharacterset]];

if (String.Length > 0)

{

return NO;

}

return YES;

}

iOS determines whether a string is a phone number, iOS determines whether a string is a string, and iOS determines whether a string is a purely numeric