输出
command＋shift＋r
NSLog(@"log: %@ ", myString); NSLog(@"log: %f ", myFloat); NSLog(@"log: %i ", myInt);
显示图片
CGRect myImageRect = CGRectMake(0.0f, 0.0f, 320.0f, 100.0f); UIImageView *myImage = [[UIImageView alloc] initWithFrame:myImageRect]; [myImage setImage:[UIImage imageNamed:@"myImage.png"]]; [self.view addSubview:myImage]; [myImage release];
app frame 大小
CGRect bounds = [[UIScreen mainScreen] bounds]; CGRect frame = [UIScreen mainScreen].applicationFrame;
浏览器控件
CGRect webFrame = CGRectMake(0.0, 0.0, 320.0, 480.0); UIWebView *webView = [[UIWebView alloc] initWithFrame:webFrame]; [webView setBackgroundColor:[UIColor clearColor]]; NSString *urlAddress = @"http://nasa.cnblogs.com"; NSURL *url = [NSURL URLWithString:urlAddress]; NSURLRequest *requestObj = [NSURLRequest requestWithURL:url]; [webView loadRequest:requestObj]; [self addSubview:webView]; [webView release];
在状态栏显示网络状态
UIApplication* app = [UIApplication sharedApplication]; app.networkActivityIndicatorVisible = YES;
播放序列动画
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; myAnimatedView.animationDuration = 0.25; // 秒 myAnimatedView.animationRepeatCount = 0; // 0 = 无限 [myAnimatedView startAnimating]; [self addSubview:myAnimatedView]; [myAnimatedView release];
提示筐
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:nil message:@"Alert!" delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil]; [alert show]; [alert release];
