IOS 验证输入的是否为数字。

• (BOOL)validateNumber:(NSString*)number {

BOOL res = YES;

NSCharacterSet* tmpSet = [NSCharacterSetcharacterSetWithCharactersInString:@”0123456789”];

int i = 0;

while (i < number.length) {

NSString * string = [number substringWithRange:NSMakeRange(i, 1)];

NSRange range = [string rangeOfCharacterFromSet:tmpSet];

if (range.length == 0) {

res = NO;

break;

}

i++;

}

return res;

}