iPhone随手记

1、图片拉伸

UIImage *img = [UIImage imageNamed:@"inputbox.png"];UIImage *stretchedImage = [img stretchableImageWithLeftCapWidth:20.0f topCapHeight:10.0f];

2、键盘高度

　　ios5 以前中文键盘高度216.0f

　　ios5 以后中文键盘高度252.0f
3、emoji小图标

http://www.easyapns.com/iphone-emoji-alerts

4、使用ASI时，需要引入的一些framework

5、获取documents目录和资源

// NSString *cookiesPath = [[self applicationDocumentsDirectory] stringByAppendingString:@"/session.Cookies"];- (NSString *)applicationDocumentsDirectory {        NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);    NSString *basePath = ([paths count] > 0) ? [paths objectAtIndex:0] : nil;    return basePath;}

获取资源:NSString *filePath = [[NSBundle mainBundle] pathForResource:@"test" ofType:@"js"];

6、格式化时间

    NSDate *date = [NSDate date];    NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];    [dateFormatter setDateFormat:@"MM-dd-yyyy HH:mm:ss"];    NSLog(@"%@ \n",[dateFormatter stringFromDate:date]);

7、区分设备是否是iPad

if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad) {    // iPad style UI} else {    // iPhone and iPod touch style UI}

8、touches -> touchesPoint

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {    UITouch *touch = [touches anyObject];    CGPoint touchPoint = [touch locationInView:self];    [self handleTouchEvent:touchPoint touchType:Touch_Down_Event_Type];}

9、获取 info.plist 文件中的值

    NSBundle *mainBundle = [NSBundle mainBundle];    NSDictionary *infoDictionary =  [mainBundle infoDictionary];    [header setObject:[infoDictionary objectForKey:@"CFBundleVersion"] forKey:@"version"];

 10、NSNotificationCenter

NSNotificationCenter *notificationCenter = [NSNotificationCenter defaultCenter];    [notificationCenter addObserver:self selector:@selector(tableHeaderButtonClicked:) name:kTableHeaderButtonClicked object:nil];[[NSNotificationCenter defaultCenter] postNotificationName:kTableHeaderButtonClicked object:nil userInfo:nil];[[NSNotificationCenter defaultCenter] removeObserver:self name:kTableHeaderButtonClicked object:nil];

11、模拟器中程序文件位置
　　打开某个文件夹，快捷键 command + shift + g, 把下面的地址粘进去, Enter 

~/Library/Application Support/iPhone Simulator

12、url encode

url = (NSString *)CFURLCreateStringByAddingPercentEscapes(kCFAllocatorDefault, (CFStringRef)url, nil, nil, kCFStringEncodingUTF8);

 13、在xcode4中使用NSZombieEnabled调试程序

http://stackoverflow.com/questions/2190227/how-do-i-setup-nszombieenabled-in-xcode-4

14、NSString编码转换(偶遇乱码问题)

NSStringEncoding enc = CFStringConvertEncodingToNSStringEncoding(kCFStringEncodingGB_18030_2000);NSString *encodingStr = [[NSString alloc] initWithData:request.responseData encoding:enc];

15、判断是否是simulator

#if TARGET_IPHONE_SIMULATOR    // Simulator code#else    // Device code#endif