iOS 金額欄位加千位分隔符的方法以及銀行卡卡號4位一空格的方法
1.金額欄位加千位分隔符方法
- (NSString *)separatedDigitStringWithStr:(NSString *)digitString
{
if (digitString.length <= 3) {
return digitString;
} else {
NSMutableString *processString = [NSMutableString stringWithString:digitString];
NSInteger location = processString.length
NSMutableArray *processArray = [NSMutableArray array];
while (location >= 0) {
NSString *temp = [processString substringWithRange:NSMakeRange(location, 3)];
[processArray addObject:temp];
if (location < 3 && location > 0
{
NSString *t = [processString substringWithRange:NSMakeRange(0, location)];
[processArray addObject:t];
}
location -= 3;
}
NSMutableArray *resultsArray = [NSMutableArray array];
int k = 0;
for
{
k++;
NSMutableString *tmp = [NSMutableStringstringWithString:str];
if (str.length > 2 && k < processArray.count )
{
[tmp insertString:@"," atIndex:0];
[resultsArray addObject:tmp];
} else {
[resultsArray addObject:tmp];
}
}
NSMutableString *resultString = [NSMutableStringstring];
for (NSInteger i = resultsArray.count - 1 ; i >= 0; i--)
{
NSString *tmp = [resultsArray objectAtIndex:i];
[resultString appendString:tmp];
}
return resultString;
}
}
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2.銀行卡卡號4位一空格方法
//檢測是否為純數字
- (BOOL)isPureInt:(NSString *)string{
NSScanner* scan = [NSScanner scannerWithString:string];
int val;
return [scan scanInt:&val] && [scan isAtEnd];
}
//在UITextField的代理方法中- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string {
NSString * toBeString = [textField.text stringByReplacingCharactersInRange:range withString:string]; //得到輸入框的內容
//檢測是否為純數字
if ([self isPureInt:string]) {
//新增空格，每4位之後，4組之後不加空格，格式為xxxx xxxx xxxx xxxx xxxxxxxxxxxxxx
if (textField.text.length % 5 == 4 && textField.text.length < 22) {
textField.text = [NSString stringWithFormat:@"%@ ", textField.text];
}
//只要30位數字
if ([toBeString length] >= 19+4+11)
{
toBeString = [toBeString substringToIndex:19+4+11];
textField.text = toBeString;
[textField resignFirstResponder];
return NO;
}
}
else if ([string isEqualToString:@""]) { // 刪除字元
if ((textField.text.length - 2) % 5 == 4 && textField.text.length < 22) {
textField.text = [textField.text substringToIndex:textField.text.length - 1];
}
return YES;
}
else{
return NO;
}
return YES;
}