iOS输入框限制只能输入数字
输入框只能输入数字
- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string {
return [self validateNumber:string];
}
- (BOOL)validateNumber:(NSString*)number {
BOOL res = YES;
NSCharacterSet* tmpSet = [NSCharacterSet characterSetWithCharactersInString:@"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;
}
本文标题：iOS输入框限制只能输入数字
本文链接：https://www.haomeiwen.com/subject/xhyklttx.html
网友评论
NSString *compStr = @"0123456789";
int i = 0;
while (i < str.length) {
NSString *number = [str substringWithRange:NSMakeRange(i, 1)];
if (![compStr containsString:number]) {
return NO;
}
i++;
}
return YES;
}