iOS - 为 UITextField 实现一个类 [英] iOS - Implementing a Class for UITextField

问题描述

我有一个 UIView，有很多 UITexfields，

I have a UIView, with lots of UITexfields,

UITextField *field1 = [[UITextField alloc] initWithFrame:CGRectMake(135, 292, 50, 20)];
field1.backgroundColor = [UIColor clearColor];
field1.borderStyle = UITextBorderStyleNone;
field1.returnKeyType = UIReturnKeyNext;
field1.contentVerticalAlignment = UIControlContentVerticalAlignmentBottom;
field1.font = [UIFont fontWithName:inputFont size:fontSize];
field1.placeholder = @"size";
[self addSubview:field1];

我可以创建一个 UITextField 类并使用这些参数预设创建此类的实例吗?- 以减少代码:(如果我有很多字段，代码会变得很长且重复?-

Can I create a UITextField Class and create an instance of this class with these parameters preset? -so as to reduce the code: (If I have lots of fields the code gets very long and repetitive? -

我能得到一些关于如何设置这个类的帮助吗！-谢谢

Can i get some help on how about to set up this class! -thank you

推荐答案

Yes You Can do this by make a BaseUITextFeild .h 和 .m文件，如下图所示.

Yes You Can do this by making a BaseUITextFeild .h and .m file as shown in the following image.

然后只需在 BaseUITextFeild.m 文件中添加有关您的设计的以下代码

And then Just add the following code regarding your design in BaseUITextFeild.m file

- (void)awakeFromNib {

    [self setupUI];
    [self setKeyboardAppearance:UIKeyboardAppearanceAlert];
}

// Function to setup the common UI throught the app.
- (void)setupUI {
    [self setContentHorizontalAlignment:UIControlContentHorizontalAlignmentCenter];
    [self setContentVerticalAlignment:UIControlContentVerticalAlignmentCenter];
    [self setTextAlignment:NSTextAlignmentCenter];
    [self setValue:[UIColor colorWithRed:120.0/225.0 green:120.0/225.0 blue:120.0/225.0 alpha:1.0] forKeyPath:@"_placeholderLabel.textColor"];
    [self setFont:[UIFont boldSystemFontOfSize:15.0f]];
}

以编程方式生成自定义 UITextField
然后只需 import "BaseUITextFeild.h" 在 ViewController 中你想使用它的地方.

Generating a custom UITextField programmatically
And then just import "BaseUITextFeild.h" in the ViewController Where you want to use it.

BaseUITextFeild *field1 = [[BaseUITextFeild alloc] initWithFrame:CGRectMake(135, 292, 50, 20)];
[self addSubview:field1];

从界面生成器(Storyboard/.XIB)生成自定义 UITextField
添加一个 UITextfield，然后将类更改为您的自定义 TextView 类.

Generating a custom UITextField From Interface Builder(Storyboard/.XIB)
Add a UITextfield and then just Change the Class to your Custom TextView Class.

通过应用以下技术，您可以在整个应用程序中使用相同的UITextFeild，只需要import BaseUITextFeild.h.

By Applying Following technique you can use this same UITextFeild through out the Application, Just need to import BaseUITextFeild.h.

你也可以使用这个 UITextFieldCategory

遵循这两个示例 UITextField+withFrame.h 和 UITextField+ColoredPlaceholder.h.您还可以根据需要自定义 UITextField.

Follow this Two Example UITextField+withFrame.h and UITextField+ColoredPlaceholder.h. You can also customize you UITextField as per your need.

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