UI 03 自定義的Label-TextField視圖 --- LTView

LTView 是自寫的繼承於 UIView 的類
這其中創建一個UILabel 和一個 UITextField ;
這樣可以少些一半的代碼.

代碼如下:
LTView.h

#import <UIKit/UIKit.h>

@interface LTView : UIView<UITextFieldDelegate>
// 因爲要在類的外部獲取輸入框的內容,修改Label的標題,所以我們把這兩部分作爲屬性寫在.h這樣在外部可以直接進行修改和設置
@property(nonatomic, retain)UILabel *myLabel;
@property(nonatomic, retain)UITextField *myTextField;

@end

LTView.m
已改爲 MRC !

#import "LTView.h"

@implementation LTView
- (void)dealloc{
    [_myLabel release];
    [_myTextField release];
    [super dealloc];
}
// 重寫默認的初始化方法.
- (instancetype)initWithFrame:(CGRect)frame{
    self = [super initWithFrame:frame];
    if (self) {
    // 模塊化
    [self  createView];
    }
    return self;
}
- (void)createView{
    // 創建兩個子視圖,一個label一個textField
    self.myLabel = [[UILabel alloc] initWithFrame:CGRectMake(20, 25, 70, 30)];
    self.myLabel.backgroundColor = [UIColor cyanColor];
    self.myLabel.alpha = 0.5;
    [self addSubview:self.myLabel];
    [_myLabel release];
    self.myLabel.textAlignment = NSTextAlignmentCenter;

    self.myTextField = [[UITextField alloc] initWithFrame:CGRectMake(150, 20, 200, 40)];
    self.myTextField.backgroundColor = [UIColor cyanColor];
    [self addSubview:self.myTextField];
    [_myTextField release];
    self.myTextField.layer.cornerRadius = 10;
    //設置代理人
    self.myTextField.delegate = self;

}
 //回收鍵盤方法.
- (BOOL)textFieldShouldReturn:(UITextField *)textField{
    [textField resignFirstResponder];
    return YES;
}

最後,再創建這樣一個對象

// 創建一個LTView對象
    LTView *view = [[LTView alloc] initWithFrame:CGRectMake(0, 100, self.window.frame.size.width, self.window.frame.size.height)];
    [self.window addSubview:view]
    ;
    [view release];
    view.myLabel.text = @"姓名";
    view.myTextField.placeholder = @"請填寫姓名";

如此,效果就同照片一樣了.

這樣創建好LTView之後, 再寫登陸頁面或註冊頁面時就會方便許多.