blocks|key|436394|text|这里发生的事情是，您正在添加一个观察者，它告诉我们用户何时完成编辑。一旦发生这种情况，我们的formatCurrency方法就会完成更新textfield外观的工作。一旦数字字段放弃其第一个响应状态，这些更改就会完全生效。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|436395|-+(void)viewDidLoad
{
++++[super+viewDidLoad];
++++[[NSNotificationCenter+defaultCenter]+addObserver:self
+++++++++++++++++++++++++++++++++++++++++++++selector:@selector(formatCurrency)
+++++++++++++++++++++++++++++++++++++++++++++name:UITextFieldTextDidEndEditingNotification
+++++++++++++++++++++++++++++++++++++++++++++++object:self.numberField];
}

-(void)touchesBegan:(NSSet+*)touches+withEvent:(UIEvent+*)event
{
++++[self.numberField+resignFirstResponder];
}

-(void)formatCurrency+{
++++NSString+*currentValue+=+self.numberField.text;
++++long+long+cur+=+[currentValue+longLongValue];
++++NSNumber+*curNum+=+@(cur);
++++NSNumberFormatter+*formatter+=+[[NSNumberFormatter+alloc]+init];
++++[formatter+setNumberStyle:NSNumberFormatterCurrencyStyle];

++++self.numberField.text+=+[NSNumberFormatter+localizedStringFromNumber:curNum
++++++++++++++++++++++++++++++++++++++++++numberStyle:NSNumberFormatterCurrencyStyle];
}|code-block|syntax|javascript|436396|entityMap^0|1A|E|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|P|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|Q|8|@]|D|@]|E|$]]]|L|$]]

Whats happening here is you're adding an observer that tells us when the user is finished editing. Once that happens our <code>formatCurrency</code> method does the work of updating the look of the textfield. The changes take full affect once the number field resigns its first responder status.

<pre><code>- (void)viewDidLoad
{
 [super viewDidLoad];
 [[NSNotificationCenter defaultCenter] addObserver:self
 selector:@selector(formatCurrency)
 name:UITextFieldTextDidEndEditingNotification
 object:self.numberField];
}

-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
 [self.numberField resignFirstResponder];
}

-(void)formatCurrency {
 NSString *currentValue = self.numberField.text;
 long long cur = [currentValue longLongValue];
 NSNumber *curNum = @(cur);
 NSNumberFormatter *formatter = [[NSNumberFormatter alloc] init];
 [formatter setNumberStyle:NSNumberFormatterCurrencyStyle];

 self.numberField.text = [NSNumberFormatter localizedStringFromNumber:curNum
 numberStyle:NSNumberFormatterCurrencyStyle];
}
</code></pre>

blocks|key|1574553|text|我编写了一个UITextField子类来处理货币格式，如下所示：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1574554|https://github.com/TomSwift/TSCurrencyTextField|1574555|它将货币金额格式化为用户类型，ATM风格.用户不得输入除数字以外的任何内容。控件使用NSNumberFormatter+(货币样式！)在内部和你可以调整，如果你愿意，调整货币符号($)，小数位，等等。|1574556|entityMap|0|LINK|mutability|MUTABLE|url^0|6|B|0|0|1B|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@$9|R|A|S|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|T|8|@]|D|@$9|U|A|V|1|W]]|E|$]]|$1|H|3|I|5|6|7|X|8|@]|D|@]|E|$]]|$1|J|3|-4|5|6|7|Y|8|@]|D|@]|E|$]]]|K|$L|$5|M|N|O|E|$P|G]]]]

I wrote a <code>UITextField</code> subclass to handle currency formatting, available here:

<a href="https://github.com/TomSwift/TSCurrencyTextField" rel="nofollow">https://github.com/TomSwift/TSCurrencyTextField</a>

It formats the currency amount as the user types, ATM-style. The user is restricted from entering anything but digits. The control uses a NSNumberFormatter (currency-style!) internally and you can tweak that if you like, to adjust the currency symbol ($), decimal places, etc.

I have two UITextFields in my app and the app has to do with currency. I am attempting to have it formatted correctly with the $ at the beginning and the decimal where it should. Like I said. I have been unable to find a noob answer to my question.

Formatting Currency Correctly for two UITextFields

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我的应用程序中有两个UITextFields，这个应用程序与货币有关。我试图让它的格式正确的$在开头和小数点的地方，它应该。就像我说的。我一直找不到答案来回答我的问题。

问正确格式化两个UITextFields的货币
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