如何在 UIToolBar 中添加条形按钮答案

【问题标题】：How to add bar buttons in a UIToolBar如何在 UIToolBar 中添加条形按钮
【发布时间】：2013-02-05 10:00:28
【问题描述】：

我创建了一个UIToolBar 并想在其中添加三个项目，例如联系人、日期和消息。我试过了，但我做不到。请帮助，因为我是 Objective C 的新手。这是我的"ViewController.m"

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad
{
[super viewDidLoad];
UIToolbar *toolbar = [[UIToolbar alloc] init];
toolbar.frame = CGRectMake(0, 414, self.view.frame.size.width, 44);
UIBarButtonItem *contact = [[UIBarButtonItem alloc]   initWithBarButtonSystemItem:UIBarButtonSystemItemEdit target:self action:nil];
UIBarButtonItem *message = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAction target:self action:nil];

NSMutableArray *items = [[NSMutableArray alloc] initWithObjects:contact,message, nil];
[toolbar setItems:items animated:NO];
[items release];
[self.view addSubview:toolbar];
[toolbar release];
}

- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
}

@end

【问题讨论】：

评论[项目发布]；和[工具栏发布]；并尝试一次。让我知道它是否有效..
评论这些行没有任何区别..

标签： iphone ios objective-c ios6

【解决方案1】：

在下面的代码中，我添加了两个 UIBarButton 和 flexSpace..
您可以根据需要添加 UIBarButton

UIToolbar *Toolbar = [[UIToolbar alloc] initWithFrame:CGRectMake(0, 0, 320, 44)];
    Toolbar.barStyle = UIBarStyleBlackTranslucent;
    [Toolbar sizeToFit];

     NSMutableArray *barItems = [[NSMutableArray alloc] init];
    UIBarButtonItem *flexSpace = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:self action:nil];
    [barItems addObject:flexSpace];
    [flexSpace release];

    UIBarButtonItem *btnCancel = [[UIBarButtonItem alloc] initWithTitle:@"Cancel" style:UIBarButtonItemStyleBordered target:self action:@selector(Cancel)];
    [barItems addObject:btnCancel];

    UIBarButtonItem *btnDone = [[UIBarButtonItem alloc] initWithTitle:@"Done" style:UIBarButtonItemStyleBordered target:self action:@selector(done)];
    [barItems addObject:btnDone];

    [Toolbar setItems:barItems animated:YES];

点击条形按钮时调用以下方法

-(void)Cancel
{
  // Write Code for Cancel Method
}

-(void)done
{
  // Write Code for Done Method
}

【讨论】：

所以用户想要 UIToolbar 上的按钮而不是导航控制器，请正确阅读问题。

【解决方案2】：

试试这个...

UIToolbar *myToolbar = [[UIToolbar alloc] initWithFrame:CGRectMake(0, 0, 300, 44)];
    myToolbar.barStyle = UIBarStyleBlackOpaque;

    UIBarButtonItem *flexibleSpaceLeft = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:nil action:nil];

    UIBarButtonItem *contactBtn = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemDone target:self action:@selector(contact:)];

UIBarButtonItem *flexibleSpace = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:nil action:nil];

 UIBarButtonItem *dateBtn = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemDone target:self action:@selector(date:)];

UIBarButtonItem *flexibleSpaceRight = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:nil action:nil];

 UIBarButtonItem *msgBtn = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemDone target:self action:@selector(message:)];

[myToolbar setItems:[NSArray arrayWithObjects: flexibleSpaceLeft, doneBtn, flexibleSpace, dateBtn, flexibleSpaceRight, msgBtn, nil]];

【讨论】：