ios学习笔记(二)xcode 4.3.2下实现基本交互
想必大家都阅读过iphone4与ipad2开发基础教程吧,这本书的xcode与现在的最新版本有些区别,去掉了view base application,只有比较接近的single view application.
首先我们创建一个single view application,注意这里我们不用自动引用计数。
接着我们点击工程列表中的MainStoryboard_iphone.storyboard 来编辑界面:
我们创建两个按钮和一个用来输出的空白文本:
目录结构与视图结构:
2.接着我们写代码来用来与IB界面编辑器来进行连接:在这里我们可以认为IBOutlet是与IB交互的输出,而IBAction则是IB交互的事件。
先编写ViewContoller.h:
#import <UIKit/UIKit.h>
@inte易做图ce ViewController : UIViewController
{
}
@property (nonatomic,retain) IBOutlet UILabel * statusText;
-(IBAction)buttonPressed:(id)sender;
@end
#import <UIKit/UIKit.h> @inte易做图ce ViewController : UIViewController { } @property (nonatomic,retain) IBOutlet UILabel * statusText; -(IBAction)buttonPressed:(id)sender; @end
接着在ViewContoller.m来实现功能:
#import "ViewController.h"
@implementation ViewController
@synthesize statusText;
-(IBAction)buttonPressed:(id)sender
{
NSString *title = [sender titleForState:UIControlStateNormal];//sender用于获得了不同的button的文字titleForState是根据button状态获取文字的函数
NSString *newText = [[NSString alloc] initWithFormat:@"%@ button pressed.", title];//将title中的文字放入newText中
statusText.text = newText;
}
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
}
- (void)viewDidUnload
{
[super viewDidUnload];
self.statusText = nil;
// Release any retained subviews of the main view.
}
- (BOOL)shouldAutorotateToInte易做图ceOrientation:(UIInte易做图ceOrientation)inte易做图ceOrientation
{
if ([[UIDevice currentDevice] userInte易做图ceIdiom] == UIUserInte易做图ceIdiomPhone) {
return (inte易做图ceOrientation != UIInte易做图ceOrientationPortraitUpsideDown);
} else {
return YES;
}
}
- (void)dealloc
{
[statusText release];
[super dealloc];
}
@end
#import "ViewController.h" @implementation ViewController @synthesize statusText; -(IBAction)buttonPressed:(id)sender { NSString *title = [sender titleForState:UIControlStateNormal];//sender用于获得了不同的button的文字titleForState是根据button状态获取文字的函数NSString *newText = [[NSString alloc] initWithFormat:@"%@ button pressed.", title];//将title中的文字放入newText中statusText.text = newText; } - (void)viewDidLoad { [super viewDidLoad]; // Do any additional setup after loading the view, typically from a nib. } - (void)viewDidUnload { [super viewDidUnload]; self.statusText = nil; // Release any retained subviews of the main view. } - (BOOL)shouldAutorotateToInte易做图ceOrientation:(UIInte易做图ceOrientation)inte易做图ceOrientation { if ([[UIDevice currentDevice] userInte易做图ceIdiom] == UIUserInte易做图ceIdiomPhone) { return (inte易做图ceOrientation != UIInte易做图ceOrientationPortraitUpsideDown); } else { return YES; } } - (void)dealloc { [statusText release]; [super dealloc]; } @end
接着我们把这些代码与IB连接起来:
选择MainStoryboard_iphone.storyboard 右击View Controller Scene中的 Buton,选择Touch down与界面的
bottonPressed相连接:
接着将lable和statusText连接在一块:
最后运行程序,点击botton看看效果:
摘自 亨利摩根的专栏
补充:移动开发 , 其他 ,