Determine if a string is a cell phone number

Determine if the phone number is correct

-(BOOL) Checktel: (NSString *) str

{

if ([str length] = = 0) {

uialertview* alert = [[Uialertview alloc] initwithtitle:@ "Prompt" message:@ "phone number cannot be empty" 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;

}

Determine if a string is a cell phone number