UITextField.png
#pragma mark ----- UITextField -----
//1 创建UITextField
UITextField * nameTextField = [[UITextField alloc] initWithFrame:CGRectMake(100, 300, 233, 50)];
//2 设置UITextField的属性
//设置背景颜色
nameTextField.backgroundColor =[UIColor cyanColor];
//设置文字(一般不使用)
nameTextField.text = @"请输入姓名";
//设置提示文字(常用)
nameTextField.placeholder = @"请输入姓名";
//设置文字对齐方式
nameTextField.textAlignment = NSTextAlignmentCenter;
//设置文字颜色
nameTextField.textColor = [UIColor redColor];
//设置字体
nameTextField.font = [UIFont systemFontOfSize:20];
//设置控件边框样式
nameTextField.borderStyle = UITextBorderStyleRoundedRect;
//设置密文显示
nameTextField.secureTextEntry = YES;
//显示清除按钮
nameTextField.clearButtonMode = UITextFieldViewModeAlways;
//指定再次编辑时, 清除输入框中内容(默认 == 0)
nameTextField.clearsOnBeginEditing = YES;
//编辑textField边框样式
nameTextField.layer.borderColor = [UIColor grayColor].CGColor;
nameTextField.layer.borderWidth = 1;
nameTextField.layer.cornerRadius = 8;
//设置左右视图
//1 新建视图
UIView *leftview = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 50, 50)];// x, y 值没有意义,他是根据textfield的位置来设置的
leftview.backgroundColor = [UIColor orangeColor];
//2 添加到textfield上
nameTextField.leftView = leftview;
nameTextField.leftViewMode = UITextFieldViewModeAlways;
//设置键盘样式
nameTextField.keyboardType = UIKeyboardTypeNamePhonePad;
//3 添加到视图上
[self.view addSubview:nameTextField];```