iOS7 UITextField

####iOS7 Programming Cookbook 第一章学习笔记 UITextField

#####Accepting User Text Input with UITextField

   
   - (void)viewDidLoad{
   [super viewDidLoad];
   
   //初始化坐标
   CGRect textFieldFrame = CGRectMake(38.0f,
                                      30.0f,
                                      240.0f,
                                      31.0f);
//初始化myTextField
   self.myTextField = [[UITextField alloc]
                       initWithFrame:textFieldFrame];
   
   //初始化myTextField 键盘类型为带小数点的数字键盘
   self.myTextField.keyboardType = UIKeyboardTypeDecimalPad;
   
   //显示一个rounded-style边框的文本字段
   self.myTextField.borderStyle = UITextBorderStyleRoundedRect;
   
   //内容垂直对齐
   self.myTextField.contentVerticalAlignment = UIControlContentVerticalAlignmentCenter;
   
   //沿着左边缘对齐文本
   self.myTextField.textAlignment = NSTextAlignmentLeft;
   
   //占位符
   self.myTextField.placeholder = @"Enter amount here.";
   
   //添加到view中
   [self.view addSubview:self.myTextField];
   
   //货币标签label 初始化
   UILabel *currencyLabel = [[UILabel alloc] initWithFrame:CGRectZero];
   //货币符号
   currencyLabel.text = [[[NSNumberFormatter alloc] init] currencySymbol];
   
   //适应字体大小
   currencyLabel.font = self.myTextField.font;
   
   //调整边界为当前视图大小
   [currencyLabel sizeToFit];
   
   //左边试图显示 货币符号
   self.myTextField.leftView = currencyLabel;
   
   //默认为UITextFieldViewModeNever，设置左视图显示
   self.myTextField.leftViewMode = UITextFieldViewModeAlways;
   }

Reference

• O’Reilly Shop iOS 7 Programming Cookbook