hhyyy9’s gists

hhyyy9 / MyAVController.m

Created December 28, 2011 08:52 — forked from benlodotcom/MyAVController.h

A little demo snippet that you can use to access directly the camera video in IOS4

	#import "MyAVController.h"


	@implementation MyAVController

	@synthesize captureSession = _captureSession;
	@synthesize imageView = _imageView;
	@synthesize customLayer = _customLayer;
	@synthesize prevLayer = _prevLayer;

hhyyy9 / gist:3802827

Created September 29, 2012 01:20

禁止UIWebView下拉拖动效果

	//Before iOS 5
	for (id subview in webView.subviews)
	if ([[subview class] isSubclassOfClass: [UIScrollView class]])
	((UIScrollView *)subview).bounces = NO;

	//After iOS 5
	webView.scrollView.bounces = NO;

hhyyy9 / gist:3802829

Created September 29, 2012 01:20

如何判断设备处于静音模式

	-(BOOL)silenced
	{
	#if TARGET_IPHONE_SIMULATOR
	// return NO in simulator. Code causes crashes for some reason.
	return NO;
	#endif

	CFStringRef state;
	UInt32 propertySize = sizeof(CFStringRef);
	AudioSessionInitialize(NULL, NULL, NULL, NULL);

hhyyy9 / gist:3802833

Created September 29, 2012 01:23

利用正则表达式判断手机号码格式是否合法

	- (BOOL)isMobileNumber:(NSString *)mobileNum
	{
	/**
	* 手机号码
	* 移动：134[0-8],135,136,137,138,139,150,151,157,158,159,182,187,188
	* 联通：130,131,132,152,155,156,185,186
	* 电信：133,1349,153,180,189
	*/
	NSString * MOBILE = @"^1(3[0-9]\|5[0-35-9]\|8[025-9])\\d{8}$";
	/**

hhyyy9 / gist:3802834

Created September 29, 2012 01:23

文字描边可以达到文字描一圈白边的效果

	//继承UILabel以后重载drawTextInRect

	- (void)drawTextInRect:(CGRect)rect {

	CGSize shadowOffset = self.shadowOffset;
	UIColor *textColor = self.textColor;

	CGContextRef c = UIGraphicsGetCurrentContext();
	CGContextSetLineWidth(c, 1);
	CGContextSetLineJoin(c, kCGLineJoinRound);

hhyyy9 / gist:3802835

Created September 29, 2012 01:24

根据要显示的文字以及UILable本身的字体，来计算能够完全显示所有文字的label所需要的大小，从而进行调整。

	//Calculate the size necessary for the UILable
	NSString *theText = @"Texting";
	CGSize theStringSize = [theText sizeWithFont:font
	constrainedToSize:theLabel.frame.size
	lineBreakMode:theLabel.lineBreakMode];

	//Adjust the size of the UILable
	theLable.frame = CGRectMake(theLable.frame.origin.x,
	theLable.frame.origin.y,
	theStringSize.width, theStringSize.height);

hhyyy9 / gist:3802840

Created September 29, 2012 01:24

更改导航条上返回按钮的标题

	UIBarButtonItem *barButtonItem = [[UIBarButtonItem alloc] init];
	barButtonItem.title = @"buttonName";
	self.navigationItem.backBarButtonItem = barButtonItem;
	[barButtonItem release]

hhyyy9 / gist:3802846

Created September 29, 2012 01:26

返回图像的灰度模式

	+ (UIImage ) grayscaleImage: (UIImage ) image
	{
	CGSize size = image.size;
	CGRect rect = CGRectMake(0.0f, 0.0f, image.size.width,
	image.size.height);
	// Create a mono/gray color space
	CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceGray();
	CGContextRef context = CGBitmapContextCreate(nil, size.width,
	size.height, 8, 0, colorSpace, kCGImageAlphaNone);
	CGColorSpaceRelease(colorSpace);

hhyyy9 / gist:3802850

Created September 29, 2012 01:26

从URL加载图像

	+ (UIImage ) imageFromURLString: (NSString ) urlstring
	{
	// This call is synchronous and blocking
	return [UIImage imageWithData:[NSData
	dataWithContentsOfURL:[NSURL URLWithString:urlstring]]];
	}

hhyyy9 / gist:3802852

Created September 29, 2012 01:28

当程序崩溃（Crash）时发出通知

JackyHuang hhyyy9