iOS 开发总结(7)

来源：未知责任编辑：责任编辑发表时间:2013-12-01 14:19　点击:次

Iphone Android Windows Phone 其他技术

[self.view addSubview:myImage];

[myImage release];

WebView:

CGRect webFrame = CGRectMake(0.0, 0.0, 320.0, 460.0);

UIWebView *webView = [[UIWebView alloc] initWithFrame:webFrame];

[webView setBackgroundColor:[UIColor whiteColor]];

NSString *urlAddress = @"http://www.google.com";

NSURL *url = [NSURL URLWithString:urlAddress];

NSURLRequest *requestObj = [NSURLRequest requestWithURL:url];

[webView loadRequest:requestObj];

[self addSubview:webView];

[webView release];

显示网络活动状态指示符

这是在iPhone左上部的状态栏显示的转动的图标指示有背景发生网络的活动。

UIApplication* app = [UIApplication sharedApplication];

app.networkActivityIndicatorVisible = YES;

动画:一个接一个地显示一系列的图象

NSArray *myImages = [NSArray arrayWithObjects: [UIImage imageNamed:@"myImage1.png"], [UIImage imageNamed:@"myImage2.png"], [UIImage imageNamed:@"myImage3.png"], [UIImage imageNamed:@"myImage4.gif"], nil];

UIImageView *myAnimatedView = [UIImageView alloc];

[myAnimatedView initWithFrame:[self bounds]];

myAnimatedView.animationImages = myImages; //animationImages属性返回一个存放动画图片的数组

myAnimatedView.animationDuration = 0.25; //浏览整个图片一次所用的时间

myAnimatedView.animationRepeatCount = 0; // 0 = loops forever 动画重复次数

[myAnimatedView startAnimating];

[self addSubview:myAnimatedView];

[myAnimatedView release];

动画:显示了something在屏幕上移动。注：这种类型的动画是“开始后不处理” -你不能获取任何有关物体在动画中的信息(如当前的位置) 。如果您需要此信息，您会手动使用定时器去调整动画的X和Y坐标

这个需要导入QuartzCore.framework

CABasicAnimation *theAnimation;

theAnimation=[CABasicAnimation animationWithKeyPath:@"transform.translation.x"];

//Creates and returns an CAPropertyAnimation instance for the specified key path.

//parameter:the key path of the property to be animated

theAnimation.duration=1;

theAnimation.repeatCount=2;

theAnimation.autoreverses=YES;

theAnimation.fromValue=[NSNumber numberWithFloat:0];

theAnimation.toValue=[NSNumber numberWithFloat:-60];

[view.layer addAnimation:theAnimation forKey:@"animateLayer"];

Draggable items//拖动项目

Here's how to create a simple draggable image.//这是如何生成一个简单的拖动图象

1. Create a new class that inherits from UIImageView

@interface myDraggableImage : UIImageView { }

2. In the implementation for this new class, add the 2 methods:

- (void) touchesBegan:(NSSet*)touches withEvent:(UIEvent*)event

{

// Retrieve the touch point 检索接触点

iOS 开发总结(7)

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