debug - UITextField 输入完跳入下一field，按钮变化

textField

.h 里创建对象

@interface ***Controller : UIViewController

{

UITextField *phoneNumber;

UITextField *verification;

}

.m 里编写逻辑及其相关的方法

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:nil];
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:nil];
}
cell.selectionStyle = UITableViewCellSelectionStyleNone;

if (indexPath.row == 0) {
phoneNumber = [[UITextField alloc] initWithFrame:CGRectMake(20, 0, 200, 44)];
phoneNumber.placeholder = @"手机号";
phoneNumber.font = [UIFont systemFontOfSize:14.0f];
phoneNumber.contentVerticalAlignment = UIControlContentVerticalAlignmentCenter;
phoneNumber.keyboardType = UIKeyboardTypePhonePad;

//

phoneNumber.returnKeyType = UIReturnKeyDone;
phoneNumber.delegate = self;

[cell.contentView addSubview:phoneNumber];
}
if (indexPath.row == 1) {
verification = [[UITextField alloc] initWithFrame:CGRectMake(20, 0, 200, 44)];
verification.placeholder = @"验证码";
verification.font = [UIFont systemFontOfSize:14.0f];
verification.contentVerticalAlignment = UIControlContentVerticalAlignmentCenter;
[cell.contentView addSubview:verification];

sendBtn = [UIButton buttonWithType:UIButtonTypeCustom];
//
sendBtn.enabled = YES;

[sendBtn setFrame:CGRectMake(CGRectGetWidth(tableView.frame) - 90, 10, 80, 22)];
[sendBtn setTitle:@"发送验证码" forState:UIControlStateNormal];
[sendBtn.titleLabel setFont:[UIFont systemFontOfSize:13.0]];
[sendBtn setBackgroundColor:COLOR(238, 238, 238, 1)];
[sendBtn.layer setCornerRadius:10.0f];
[sendBtn addTarget:self action:@selector(sendButtonClick:) forControlEvents:UIControlEventTouchUpInside];

[cell.contentView addSubview:sendBtn];
}

return cell;
}
phoneNumber.returnKeyType = UIReturnKeyDone;
phoneNumber.delegate = self;

[cell.contentView addSubview:phoneNumber];
}
if (indexPath.row == 1) {
verification = [[UITextField alloc] initWithFrame:CGRectMake(20, 0, 200, 44)];
verification.placeholder = @"验证码";
verification.font = [UIFont systemFontOfSize:14.0f];
verification.contentVerticalAlignment = UIControlContentVerticalAlignmentCenter;
[cell.contentView addSubview:verification];

sendBtn = [UIButton buttonWithType:UIButtonTypeCustom];
//
sendBtn.enabled = YES;

[sendBtn setFrame:CGRectMake(CGRectGetWidth(tableView.frame) - 90, 10, 80, 22)];
[sendBtn setTitle:@"发送验证码" forState:UIControlStateNormal];
[sendBtn.titleLabel setFont:[UIFont systemFontOfSize:13.0]];
[sendBtn setBackgroundColor:COLOR(238, 238, 238, 1)];
[sendBtn.layer setCornerRadius:10.0f];
[sendBtn addTarget:self action:@selector(sendButtonClick:) forControlEvents:UIControlEventTouchUpInside];

[cell.contentView addSubview:sendBtn];
}

return cell;
}

// 此方法的唯一缺陷是，判断的延迟，当输入完成后，才判断字符串长度
- (BOOL) textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string
{
// 当输入的数字长度为11时，自动跳入验证码输入框
if (phoneNumber.text.length == 11) {

// 验证码框成为第一响应者，即当输入窗口完成时，自动跳到验证码窗口，“发送验证码”按钮亮起
[verification becomeFirstResponder];

// 发送按钮可点击，NO：不可点击
sendBtn.enabled = YES;

[sendBtn setBackgroundColor:[UIColor grayColor]];
return NO;
} else { [sendBtn setBackgroundColor:COLOR(238, 238, 238, 1)]; }
return YES;
}

// 在当前框内开始编辑时，触发此方法
- (void)textFieldDidBeginEditing:(UITextField *)textField
{
sendBtn.enabled = YES;
[sendBtn setBackgroundColor:COLOR(238, 238, 238, 1)];

}

另外，有关UITextField的方法还有- (BOOL)textFieldShouldReturn:(UITextField *)textField

// 该方法 键盘弹出的时候 点return键盘隐藏
- (BOOL)textFieldShouldReturn:(UITextField *)textField
{
if ([NameStr isEqualToString:textField.text]) {
return [NameTF resignFirstResponder];
}else
{
if (textField.text.length > 0 && textField.text.length <= 15) {
NameStr = NameTF.text;

[self updateNickName];
}else
{
[Dialog simpleToast:@"请输入昵称并确保不超过20位"];
}
}

return [nickNameTF resignFirstResponder];
}