- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string
{
NSMutableString * futureString = [NSMutableString stringWithString:textField.text];
[futureString? insertString:string atIndex:range.location];
NSInteger flag=0;
const NSInteger limited = 2;//小數(shù)點后需要限制的個數(shù)
for (int i = futureString.length - 1; i>=0; i--) {
if ([futureString characterAtIndex:i] == '.') {
if (flag > limited) {
return NO;
}
break;
}
flag++;
}
return YES;
}
