TextField的文字距左边框的距离偏移

默认状况下,当向textField输入文字时,文字会紧贴在textField左边框上.

咱们能够经过设置textField的leftView,设置一个只有宽度的leftView.

这样还不够,由于默认leftView是不显示的.还须要将leftViewMode设置为 UITextFieldViewModeAlways.这样就完成了.

(小技巧:经过查询UITextField的头文件能够看出leftView和leftViewMode这两个属性写在了一组,与其余属性之间是分开的,说明这两个属性的关系很紧密)

 

　UITextField *textField = [[UITextField alloc]init];
    textField.frame = CGRectMake(10, 30, 300, 30);
    textField.placeholder = @"测试";
    textField.borderStyle = UITextBorderStyleLine;
    [self.view addSubview:textField];

    textField.leftView = [[UIView alloc]initWithFrame:CGRectMake(0, 0, 20, 0)];
    //设置显示模式为永远显示(默认不显示)
    textField.leftViewMode = UITextFieldViewModeAlways;