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UIToolBar控件：是经常使用的一个工具条控件，在它里面可以添加很多其他控件,UILabel、UIButton、UIImage、UIBarButtonItem、UITextField等等、、。可以用来对视图view中控件进行自定义的布局。视图布局完成后,可以直接拿来用，不用再用代码去控制控件的坐标和大小,方便而且准确。
一、采用系统默认.xib文件中的UIToolBar制作的增删条(删除和添加图片)
（1）添加有两个标签Label的系统设置的UIToolBar
代码如下：需要在代码中为添加的控件人为设置frame具体坐标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 //让删除按钮有效 14 [self.barButtonitemDelete setEnabled:YES]; 15 16 //在subView中已经有了3个控件 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 //添加头像 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 //删除视图 49 UIView *lastView = [self.view.subviews lastObject]; 50 [lastView removeFromSuperview]; 51 52 //如果没有了contactView，设置删除按钮无效 53 if(self.view.subviews.count == 3) 54 { 55 [self.barButtonitemDelete setEnabled:NO]; 56 } 57 } 58 59 - (void)viewDidLoad { 60 [super viewDidLoad]; 61 //开始时删除设置为无效 62 [self.barButtonitemDelete setEnabled:NO]; 63 } 64 65 - (void)didReceiveMemoryWarning { 66 [super didReceiveMemoryWarning]; 67 // Dispose of any resources that can be recreated. 68 }
二、采用提前自定义布局的.xib文件中的UIToolBar制作的增删条(删除和添加图片)
（2）添加UIImage、UILabel控件后自定义的UIToolBar
代码如下：不需要在代码中再去设置添加控件的frame,在.xib文件中已经布局好了。
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 //让删除按钮有效 14 [self.barButtonitemDelete setEnabled:YES]; 15 16 //在subView中已经有了3个控件 17 NSInteger count = self.view.subviews.count - 3; 18 CGRect lastFrame = self.toolBar.frame; 19 20 //加载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 //添加头像 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 //删除视图 51 UIView *lastView = [self.view.subviews lastObject]; 52 [lastView removeFromSuperview]; 53 54 //如果没有了contactView，设置删除按钮无效 55 if(self.view.subviews.count == 3) 56 { 57 [self.barButtonitemDelete setEnabled:NO]; 58 } 59 } 60 61 - (void)viewDidLoad { 62 [super viewDidLoad]; 63 //开始时删除设置为无效 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
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原文地址：http://www.cnblogs.com/XYQ-208910/p/4767887.html
