UIToolBar控件:是經常使用的一個工具條控件,雖然在上面可以添加子控件,但是toolbar中只能添加UIBarButtonItem類型的子控件,其他子控件會被包裝成這種類型的,例如UIButton。通過工具欄可以用來對視圖View中內容進行操作。
原理:
可以在toolBar上添加任何子控件。其實它的原理是把你要添加的子控件先加到toolbarItems數組里面,最后再把toolbarItems數組一次性放到toolbar工具欄里面。
雖然可以在toolbar中添加其他任何的視圖控件如UILabel、UITextField、UIImageView等等,但是在xib/storyboard圖形界面設計時,不能它們直接放置到UIToolBar中。若強行將它們拖曳到UIToolBar,會使它們放置在上層容器中,而不是UIToolBar中。所以前提是先必須添加一個視圖UIView控件到toolbar中,它會被包裝成UIBarButtonItem類型,然后再在UIView中添加需要的子視圖控件。
舉例如下:將UILabel加入到toolbar工具欄中,步驟如下:
1. 將UIView拖曳到UIToolBar(UIToolBar中自動增加了一個UIBarButtonItem,其中便是剛才插入的UIView);
2. 將UILabel(或其他控件)拖曳到剛才的UIView中;
3. 將剛才的UIView的Background設為某種顏色(如藍色);
4. 將剛才的UIView的Background設為Default。
對toolbar進行初始化:
-initWithTitle(添加button用這個)
-initWithImage
-initWithBarButtonSystemItem(添加系統自定義的button,形狀跟大小都已經固定了)下面鏈接里面有按鈕圖片樣式
-initWithCustomView(添加除了button以外的View)
一、采用系統默認.xib文件中的UIToolBar,制作的工具欄(刪除和添加圖片)
(1)默認的View視圖布局

代碼如下:需要在代碼中為添加的控件人為設置frame具體坐標x,y、大小width,height
1 #import "ViewController.h"
2 #define CONTACE_VIEW_HEIGHT 50
3 @interface ViewController ()
4 @property (weak, nonatomic) IBOutlet UIToolbar *toolBar;
5 @property (weak, nonatomic) IBOutlet UIBarButtonItem *barButtonitemDelete;
6
7 @end
8
9 @implementation ViewController
10 - (IBAction)addContact:(UIBarButtonItem *)sender
11 {
12
13 //讓刪除按鈕有效
14 [self.barButtonitemDelete setEnabled:YES];
15
16 //在subView中已經有了3個控件
17 NSInteger count = self.view.subviews.count - 3;
18 CGRect lastFrame = self.toolBar.frame;
19
20 UIView *contactView = [[UIView alloc]init];
21 CGFloat gapY = 5;
22 CGFloat x = 0;
23 CGFloat y = lastFrame.origin.y + lastFrame.size.height + (CONTACE_VIEW_HEIGHT+gapY) * count;
24 CGFloat w = self.view.frame.size.width;
25
26 contactView.frame = CGRectMake(x,y,w,CONTACE_VIEW_HEIGHT);
27
28
29 //添加頭像
30 UIImage *image = [UIImage imageNamed:[NSString stringWithFormat:@"%d.png",arc4random_uniform(9)]];
31 UIImageView *face = [[UIImageView alloc]initWithImage:image];
32 face.frame = CGRectMake(10, 0,50,50);
33 [contactView addSubview:face];
34
35 //添加姓名
36 UILabel *labelName = [[UILabel alloc]init];
37 labelName.text = [NSString stringWithFormat:@"name%d",arc4random_uniform(10)];
38 labelName.frame = CGRectMake(10+image.size.width+50, 0, 100, 50);
39 [contactView addSubview:labelName];
40
41
42 contactView.backgroundColor = [UIColor lightGrayColor];
43
44 [self.view addSubview:contactView];
45 }
46 - (IBAction)deleteContact:(UIBarButtonItem *)sender
47 {
48 //刪除視圖
49 UIView *lastView = [self.view.subviews lastObject];
50 [lastView removeFromSuperview];
51
52 //如果沒有了contactView,設置刪除按鈕無效
53 if(self.view.subviews.count == 3)
54 {
55 [self.barButtonitemDelete setEnabled:NO];
56 }
57 }
58
59 - (void)viewDidLoad {
60 [super viewDidLoad];
61 //開始時刪除設置為無效
62 [self.barButtonitemDelete setEnabled:NO];
63 }
64
65 - (void)didReceiveMemoryWarning {
66 [super didReceiveMemoryWarning];
67 // Dispose of any resources that can be recreated.
68 }
二、采用提前自定義布局的.xib文件中的UIToolBar,制作的工具欄(刪除和添加圖片)
(2)自定義的View視圖布局,添加UIImage、UILabel控件

代碼如下:不需要在代碼中再去設置添加控件的frame,在.xib文件中已經布局好了。
1 import "ViewController.h"
2 #define CONTACE_VIEW_HEIGHT 50
3 @interface ViewController ()
4 @property (weak, nonatomic) IBOutlet UIToolbar *toolBar;
5 @property (weak, nonatomic) IBOutlet UIBarButtonItem *barButtonitemDelete;
6
7 @end
8
9 @implementation ViewController
10 - (IBAction)addContact:(UIBarButtonItem *)sender
11 {
12
13 //讓刪除按鈕有效
14 [self.barButtonitemDelete setEnabled:YES];
15
16 //在subView中已經有了3個控件
17 NSInteger count = self.view.subviews.count - 3;
18 CGRect lastFrame = self.toolBar.frame;
19
20 //加載xib文件
21 NSArray *views = [[NSBundle mainBundle]loadNibNamed:@"contactView" owner:nil options:nil];
22
23 //添加contactView
24 UIView *contactView = [views lastObject];
25
26
27 CGFloat gapY = 5;
28 CGFloat x = 0;
29 CGFloat y = lastFrame.origin.y + lastFrame.size.height + (CONTACE_VIEW_HEIGHT+gapY) * count;
30 CGFloat w = self.view.frame.size.width;
31 contactView.frame = CGRectMake(x,y,w,CONTACE_VIEW_HEIGHT);
32
33
34 //添加頭像
35 UIImageView *face = (UIImageView *)[contactView viewWithTag:1];
36 UIImage *image = [UIImage imageNamed:[NSString stringWithFormat:@"%d.png",arc4random_uniform(9)]];
37 [face setImage:image];
38
39
40
41 //添加姓名
42 UILabel *labelName = (UILabel *)[contactView viewWithTag:2];
43 labelName.text = [NSString stringWithFormat:@"name%d",arc4random_uniform(10)];
44
45 [self.view addSubview:contactView];
46 }
47
48 - (IBAction)deleteContact:(UIBarButtonItem *)sender
49 {
50 //刪除視圖
51 UIView *lastView = [self.view.subviews lastObject];
52 [lastView removeFromSuperview];
53
54 //如果沒有了contactView,設置刪除按鈕無效
55 if(self.view.subviews.count == 3)
56 {
57 [self.barButtonitemDelete setEnabled:NO];
58 }
59 }
60
61 - (void)viewDidLoad {
62 [super viewDidLoad];
63 //開始時刪除設置為無效
64 [self.barButtonitemDelete setEnabled:NO];
65 }
66
67 - (void)didReceiveMemoryWarning {
68 [super didReceiveMemoryWarning];
69 // Dispose of any resources that can be recreated.
70 }
71
72 @end

