圖片toolbar iphone

toolbars are used to present a set of functions to a user. You will see these at the bottom of iPhone apps and generally give you the option to do things like edit files, send email or take a picture. Here is an example of what a toolbar will look like in an iPhone app:

效果類似於圖片庫中的,toolbar上是圖片按鈕,並且可以分部排列.

Using UIToolbar in Your iPhone Apps

Today, I am going to show you how to use UIToolbar in your iPhone apps. Essentially, what you need to do is to create an instance of UIToolbar, add buttons to it and then add the toolbar to your view. Usually, you will also need to assign actions to each toolbar button as well.

Here is video of how to use UIToolbar taken from my own code library that I ship with my ebook:

Source Code for Using UIToolbar

#import "Toolbar.h"@implementation ToolbarUILabel *label;UIToolbar *toolbar;- (void)viewDidLoad {    [super viewDidLoad];//Create labellabel = [[UILabel alloc] init];label.frame = CGRectMake(10, 10, 300, 40);label.textAlignment = UITextAlignmentCenter;label.text = @"Press Button";[self.view addSubview:label];[label release];//create toolbar using newtoolbar = [UIToolbar new];toolbar.barStyle = UIBarStyleDefault;[toolbar sizeToFit];toolbar.frame = CGRectMake(0, 410, 320, 50);//Add buttonsUIBarButtonItem *systemItem1 = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAdd                                                                             target:self                                                                             action:@selector(pressButton1:)];UIBarButtonItem *systemItem2 = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAction                                                                             target:self                                                                             action:@selector(pressButton2:)];UIBarButtonItem *systemItem3 = [[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemCameratarget:self action:@selector(pressButton3:)];//Use this to put space in between your toolbox buttonsUIBarButtonItem *flexItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpacetarget:nilaction:nil];//Add buttons to the arrayNSArray *items = [NSArray arrayWithObjects: systemItem1, flexItem, systemItem2, flexItem, systemItem3, nil];//release buttons[systemItem1 release];[systemItem2 release];[systemItem3 release];[flexItem release];//add array of buttons to toolbar[toolbar setItems:items animated:NO];[self.view addSubview:toolbar];}//Action methods for toolbar buttons:- (void) pressButton1:(id)sender{label.text = @"Add";}- (void) pressButton2:(id)sender{label.text = @"Take Action";}- (void) pressButton3:(id)sender{label.text = @"Camera";}- (void)dealloc {[toolbar release];[label release];    [super dealloc];}@end