ViewController.h文件中:

@interface ViewController : UIViewController

- (IBAction)add:(UIBarButtonItem *)sender;
- (IBAction)remove:(UIBarButtonItem *)sender;
- (IBAction)deleteClick:(UIButton *)btn; @property (weak, nonatomic) IBOutlet UIBarButtonItem *removeItem; @end

ViewController.m文件中:

const int K_ROW_WIDTH = ;
const int K_ROW_HEIGHT = ; #import "ViewController.h"
#include "RowView.h" // 类扩展(class extension),又叫匿名分类
@interface ViewController ()
{
NSArray *_allNames;
}
@end @implementation ViewController - (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
_allNames = @[@"努力", @"奋斗", @"加油", @"动力", @"向上"];
} - (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
} - (IBAction)add:(UIBarButtonItem *)sender {
// 1.取出最后一个子控件
UIView *last = [self.view.subviews lastObject];
CGFloat rowY = last.frame.origin.y + last.frame.size.height + ; // 2.创建一行view
UIView *row = [self createRowView];
row.frame = CGRectMake(, rowY, K_ROW_WIDTH, K_ROW_HEIGHT); // 3.添加一行到控制器的view中
[self.view addSubview:row]; // 4.修改删除Item的状态
_removeItem.enabled = YES; // 5.添加动画
CGRect tempFrm = row.frame;
tempFrm.origin.x = K_ROW_WIDTH;
row.frame = tempFrm;
row.alpha = ; [UIView animateWithDuration:0.6 animations:^{
CGRect tempFrm = row.frame;
tempFrm.origin.x = ;
row.frame = tempFrm;
row.alpha = ;
} completion:^(BOOL finished) {
//
}];
} - (UIView *)createRowView
{
//通过加载lib进行新建
NSString *iconName = [NSString stringWithFormat:@"01%d.png", arc4random_uniform()];
NSString *name = _allNames[arc4random_uniform(_allNames.count)];
UIView *row = [RowView rowViewWithIcon:iconName name:name]; return row; } #pragma mark 点击联系人所在行中的“删除”按钮
- (IBAction)deleteClick:(UIButton *)btn
{ [UIView animateWithDuration:0.6 animations:^{
CGRect tempFrm = btn.superview.frame;
tempFrm.origin.x = K_ROW_WIDTH;
btn.superview.frame = tempFrm; btn.superview.alpha = ;
} completion:^(BOOL finished) {
// 获取即将删除的这行在数组中的位置索引
int startIndex = [self.view.subviews indexOfObject:btn.superview]; [UIView animateWithDuration:0.2 animations:^{
for (int i = startIndex; i < self.view.subviews.count; ++i) {
UIView *child = self.view.subviews[i];
CGRect tempFrm = child.frame;
tempFrm.origin.y -= K_ROW_HEIGHT + ;
child.frame = tempFrm;
}
}]; [btn.superview removeFromSuperview];
_removeItem.enabled = self.view.subviews.count > ;
}]; } - (IBAction)remove:(UIBarButtonItem *)sender {
// 1.取出最后一个子控件
UIView *last = [self.view.subviews lastObject]; // // 判断最后一个子控件是否为toolbar控件
// if ([last isKindOfClass:[UIToolbar class]]) {
// return;
// } // 添加动画
[UIView animateWithDuration:0.6 animations:^{
CGRect tempFrm = last.frame;
tempFrm.origin.x = K_ROW_WIDTH;
last.frame = tempFrm;
last.alpha = ;
} completion:^(BOOL finished) {
// 2.删除
[last removeFromSuperview]; // 3.修改删除Item的状态
_removeItem.enabled = self.view.subviews.count > ;
}]; } @end

RowView.xib RowView.h文件中:

@interface RowView : UIView

+ (id)rowViewWithIcon:(NSString *)icon name:(NSString *)name;
@property (weak, nonatomic) IBOutlet UIButton *iconBtn;
@property (weak, nonatomic) IBOutlet UILabel *nameLabel; @end

RowView.xib RowView.m文件中:

@implementation RowView

+(id)rowViewWithIcon:(NSString *)icon name:(NSString *)name
{
RowView *row = [[NSBundle mainBundle] loadNibNamed:@"RowView" owner:nil options:nil][];
[row.iconBtn setImage:[UIImage imageNamed:icon] forState:UIControlStateNormal];
row.nameLabel.text = name; return row;
} @end

界面效果:

06-联系人管理(xib应用)-LMLPHP

一、类扩展(class extension,匿名分类)

1、格式:

@interface ViewController ()

{

// 成员变量

}

// 方法声明

@end

2、作用

1>写在.m文件中

2>一般用来扩充私有成员变量、@property属性、方法等

二、随机数的生产

1、arc4random() 会生成任意正整数和0

2、arc4random_uniform(100) 会生成0~99的整数(包括0和99)

三、UIView常用方法

1、addSubview:(UIView *)child

添加子控件(最新添加的子控件,

2、NSArray *subviews

通过addSubview:方法添加的子控件都会存在于这个数组中

3、removeFromSuperview

将控件本身从父控件中移除(控件本身也会从父控件的subviews数组中移除)

4、(UIView *)viewWithTag:(int)myTag

* 返回tag值等于mytag的子控件

* 如果有多个子控件的tag一样,只会返回第一个匹配的子控件(在搜索tag匹配的控件时,也包括控件本身)

5、UIView *superview

返回父控件

四、xib的基本使用

1.xib和nib是同义词

2.加载xib文件

[[NSBundle mainBundle] loadNibNamed:@"RowView" owner:nil options:nil]

//返回xib文件中,objects下面的所有控件,按顺序装在数组中返回

3.storyboard和xib的异同

1>区别

*stroyboard:描述软件界面,大范围,重量级,比较适合描述整个软件的所有界面

*xib:描述软件界面,小范围,轻量级,比较适合描述某个小界面(局部界面)

2>相同点:

本质都是转成代码(都是xml文件格式)

4.File‘s Owner的使用步骤:

1>在xib文件中设置File‘s Owner的calss属性(目的:是在xib中能找到Owner 的方法)

2>建立File‘s Owner 跟 控件之间的联系(连线)

3>利用代码加载xib,传递Owner参数(类型一定要匹配)

05-13 10:01