UILTView经典知识点练习

作者：韩俊强   未经允许，请勿转载！

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声明：UILTView 指：UILabel 和 UITextField 的复合

#import "AppDelegate.h"

@interface
AppDelegate
()<</span>UITextFieldDelegate>

@end

@implementation
AppDelegate

- (void)dealloc{

self.window
=
nil;

[super
dealloc];

}

- (BOOL)application:(UIApplication
*)application
didFinishLaunchingWithOptions:(NSDictionary
*)launchOptions
{

   
self.window
=
[[[UIWindow
alloc]
initWithFrame:[[UIScreen
mainScreen]
bounds]]autorelease];

//主视图

   
UIView
*contenView =
[[UIView
alloc]initWithFrame:[UIScreen
mainScreen].bounds];

   
contenView.tag
=
300;

   
contenView.backgroundColor
=
[UIColor
brownColor];

   
[self.window
addSubview:contenView];

[contenView release];

//数据源：是用来提供数据

//label上的数据

NSArray
*texts
= @[@"用户名",@"密码",@"确认密码",@"手机号",@"邮箱"];

//textField上的数据

   
NSArray
*placegolds
= @[@"请输入用户名",@"请输入密码",@"请再次确认密码",@"请输入手机号",@"请输入邮箱"];

———————————————————————————————————————

 
  for循环布局：

   
for
(int
i
= 0;
i <</span> 5;
i ++) {

       
UILabel
*label =
[[UILabel
alloc]initWithFrame:CGRectMake(20,
40
+
50
*i,
60,
30)];

label.backgroundColor
=
[UIColor
greenColor];

label.text
=
texts[i];

       
label.layer.cornerRadius
=
10;//切圆角

label.layer.masksToBounds
=
YES;

label.tag
=
100
+
i;

       
label.font
=
[UIFont
boldSystemFontOfSize:15];

       
label.textAlignment
=
NSTextAlignmentCenter;//居中对齐

       
[contenView addSubview:label];

[label release];

       

 
 
    
UITextField
*field =
[[UITextField
alloc]initWithFrame:CGRectMake(100,
40
+
50
*
i, 200,
30)];

     

       
field.placeholder
= placegolds[i];//输入提示内容

       
field.borderStyle
=
UITextBorderStyleRoundedRect;

field.backgroundColor
=
[UIColor
cyanColor];

field.tag
=
200
+
i;

       
//添加代理

field.delegate
=self;

[contenView addSubview:field];

[field release];

       
if
(1
==
i || 2
== i)
{

           
field.secureTextEntry
=
YES;//加密框显示

       
}

       
if
(3
== i )
{

           
field.keyboardType
=
UIKeyboardTypeNumberPad;//显示数字键盘

       
} 
 
  

   
}

——————————————————————————————————

   
//登录

UIButton
*loginBotton =
[UIButton
buttonWithType:UIButtonTypeSystem];

loginBotton.frame
=
CGRectMake(40,
300,
100,
30);

loginBotton.backgroundColor
=
[UIColor
yellowColor];

[loginBotton setTitle:@"登录"
forState:UIControlStateNormal];

[contenView addSubview:loginBotton];

//注册

UIButton
*signBotton =
[UIButton
buttonWithType:UIButtonTypeSystem];

signBotton.frame
=
CGRectMake(180,
300,
100,
30);

signBotton.backgroundColor
=
[UIColor
yellowColor];

[signBotton setTitle:@"注册"
forState:UIControlStateNormal];

[contenView addSubview:signBotton];

 
  

   
// Override
point for customization after application
launch.

self.window.backgroundColor
=
[UIColor
whiteColor];

[self.window
makeKeyAndVisible];

return
YES;

}

=================================================
//点击空白回收键盘

- (void)touchesEnded:(NSSet
*)touches
withEvent:(UIEvent
*)event{

   
//获取父视图

UIView
*contenView =
[self.window
viewWithTag:300];

for
(int
i
= 0;
i <</span> 5;
i ++ ) {

       
UITextField
*field =
(UITextField
*)[contenView
viewWithTag:200
+
i];

       
[field resignFirstResponder];

}

}

//textField
点return回收键盘

-
(BOOL)textFieldShouldReturn:(UITextField
*)textField;{

[textField resignFirstResponder];

return
YES;

}

最终效果：

例子：对上例题优化

建立LTView子类，继承自UIView

LTView.h

#import

@interface
LTView
: UIView

@property
(nonatomic,retain)UILabel
*label;
@property
(nonatomic,retain)UITextField
*field;

@end

LTView.m

@implementation
LTView
//释放LT

- (void)dealloc{

self.label
=
nil;

self.field
=
nil;

[super
dealloc];

}

//重写父类的初始化方法

- (instancetype)initWithFrame:(CGRect)frame{

if
(self
=
[super
initWithFrame:frame])
{

       
[self
p_setup]; 
//调用封装

   
}

   
return
self;

}

//封装成一个方法建议用_label，因为用seif.容易和后面的CGRectMake（self.）混淆

-
(void)p_setup{

_label
=
[[UILabel
alloc]initWithFrame:CGRectMake(0,
0,
self.frame.size.width
/
2,
self.frame.size.height)];

//   
_label.backgroundColor = [UIColor blueColor];

    [self
addSubview:_label];

[_label
release];

_field
=
[[UITextField
alloc]initWithFrame:CGRectMake(self.frame.size.width
/
2,
0,
self.frame.size.width
/
2,
self.frame.size.height)];

//   
_field.backgroundColor = [UIColor cyanColor];

   
[self
addSubview:_field];

[_field
release];

}

UIView *contenView =
[[UIView
alloc]initWithFrame:[UIScreen
mainScreen].bounds];

   
contenView.tag
=
300;

   
contenView.backgroundColor
=
[UIColor
whiteColor];

   
[self.window
addSubview:contenView];

[contenView release];

  //=============================================

AppDelegate.m

记得引入子类头文件

#import
"LTView.h"

   
//数据源：是用来提供数据

//label上的数据

NSArray
*texts
= @[@"用户名",@"密码",@"确认密码",@"手机号",@"邮箱"];

//textField上的数据

   
NSArray
*placegolds
= @[@"请输入用户名",@"请输入密码",@"请再次确认密码",@"请输入手机号",@"请输入邮箱"];

// {(20,40 +
50*i),(280,30)}

   
//我们管我们自己定义的控件叫做自定义复合视图，因为系统没有为我们提供需要的控件；

for
(int
i
= 0;
i <</span> 5;
i ++) {

       
LTView
*view =
[[LTView
alloc]initWithFrame:CGRectMake(20,
40
+
50
*
i, 280,
30)];

//给label赋值

view.label.text
=texts[i];

//给field赋值

view.field.placeholder
=
placegolds[i];

       
//设置代理

view.field.delegate
=
self;

//给view设置tag值

       
view.tag
=
200
+
i;

 
   

       
view.backgroundColor
=
[UIColor
whiteColor];

[contenView addSubview:view];

[view release];

   
}   
//登录

   
UIButton
*loginBotton =
[UIButton
buttonWithType:UIButtonTypeSystem];

loginBotton.frame
=
CGRectMake(40,
300,
100,
30);

loginBotton.backgroundColor
=
[UIColor
yellowColor];

   
[loginBotton setTitle:@"登录"
forState:UIControlStateNormal];

   
[contenView addSubview:loginBotton];

//注册

UIButton
*signBotton =
[UIButton
buttonWithType:UIButtonTypeSystem];

signBotton.frame
=
CGRectMake(180,
300,
100,
30);

signBotton.backgroundColor
=
[UIColor
yellowColor];

   
[signBotton setTitle:@"注册"
forState:UIControlStateNormal];

   
[contenView addSubview:signBotton];

 ————————————————————————————

//重写点击空白回收键盘

- (void)touchesEnded:(NSSet
*)touches
withEvent:(UIEvent
*)event{

   
//   
//获取父视图

       
UIView
*contenView =
[self.window
viewWithTag:300];

for
(int
i
= 0;
i <</span> 5;
i ++) {

       
//此时contentView
上的控件是我们自定义出来的LTView，所以根据Tag取出控件应该转换为LTView类型

LTView
*view =
(LTView
*)[contenView
viewWithTag:200
+
i];

       
[view.field
resignFirstResponder];

   
}

}

—————————————————————————————

//点击return收回键盘

-
(BOOL)textFieldShouldReturn:(UITextField
*)textField;{

[textField resignFirstResponder];

return
YES;

}

回到本节知识汇总：http://blog.sina.com.cn/s/blog_814ecfa90102vvb0.html

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