限制输入框 只能输入数字
#define NUMBERS @"0123456789"
- (BOOL)textField:(UITextField*)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString*)string
{
NSCharacterSet *cs;
cs = [[NSCharacterSet characterSetWithCharactersInString:NUMBERS] invertedSet];
NSString *filtered = [[string componentsSeparatedByCharactersInSet:cs] componentsJoinedByString:@""];
BOOL basicTest = [string isEqualToString:filtered];
if(!basicTest) {
NSLog(@"提示：只能输入数字！");
return NO;
}
return YES;
}
