IOS

IOS implements a simple mobile UIView code instanceCreate a UIView in iewDidLoadzh[Cpp]UIView * tmpView = [[UIView alloc] initWithFrame: CGRectMake (30.0, 30.0, 45.0, 45.0)];TmpView. backgroundColor = [UIColor brownColor];TmpView. tag= 100;[Self.

Two days ago, I mentioned on my Weibo that the iPhone 5 adaptation was really physical. Android students laughed and said nothing. To adapt to the iPhone 5, you need to perform the following basic actions: 1. Provide a 1136*640 startup

AddressBook. framework is the c api's direct access to the database framework of the address book, and AddressBookUI. framework is the interaction framework of the oc interface; The following code is used to operate on the address book. The pure c

[Cpp] // obtain a subView UIView * view of a window = [[[[UIApplication sharedApplication] windows] objectAtIndex: 0] subviews] lastObject]; NSInteger index = 0; // name the saved png file for (UIView * subView in [view subviews]) {// traverse the

1. Why should I set a variable release to nil to a variable release? The Memory pointed to by this variable is released, but the variable itself remains unchanged and still points to the original memory address. If this variable is accessed after it

We know that you can use the Prefix. pch file in the IOS project to perform some pre-compilation operations, such as introducing global header files and defining constants. I encountered an incredible problem when I was preparing to write a Demo

Cocould not change executable permissions on the application. This error occurs because the certificate is used twice. That is to say, a project with this certificate already exists on the real machine. If you delete the previous project from the

Uploading images and data to the server is the most basic requirement. Some IOS users may not know how the server receives images. So today I copied the server code... Only ASP. NET .. PHP and J2EE should be almost a few words of the IOS side code:

How to crop images that overwrite UIImageView with a specific shape? Solution: Use two images and the following method. Image 1 is the cropped image, and image 2 is the shape to be cropped. [Plain]-(UIImage *) maskImage :( UIImage *) image withMask :

1. create fake framework. Use this XCode Plugin: iOS-Universal-Framework to directly create a static library XXX. framework. 2. download the source code of ASIHttpRequest: ASIHTTPRequest3. use the above plug-in to create the fake static iOS

Original Problem description: an IOS application has been developed. There are some files in the document directory. You need to check whether these files have been edited or changed. I don't know how to implement it? What is the last modification

NSMutableDictionary-(void) setObject :( id) for :( NSstring *) key when the id is nil, crash will appear. However, when setValue is used, nothing happens. Currently, Dic uses setValue instead of setObject to construct MutableDictionary. There is no

Use the following code to implement a circular photo frame: [Plain]CGContextRef context = CGBitmapContextCreate (NULL, self. bounds. size. width, self. bounds. size. height, 8, 4 * self. bounds. size. width, CGColorSpaceCreateDeviceRGB (),

I am recently working on an iPhone text message upload and download project. After the text message is downloaded, I need to restart the SMS app to view the downloaded text message. However, in reality, it is impossible for users to restart the sms

IOS: NSNotification1. Overview of the notification centerThe notification center actually provides a message broadcast mechanism within the program. The notification center cannot communicate between processes. It is actually a two-pass operator

1 PrefaceYou can press the Cell length of UITableView to trigger shortcut menus, including copying, pasting, and other operations. 2. code exampleZYViewController. h   [Plain] view plaincopyprint? # Import  @ Interface ZYViewController:

Typedef enum {UITableViewCellSelectionStyleNone,UITableViewCellSelectionStyleBlue,UITableViewCellSelectionStyleGray} UITableViewCellSelectionStyle// Cell button format on the rightTypedef enum {UITableViewCellAccessoryNone, // don't show any

The following code detects the shaking time:   CMMotionManager * _ motionManager = [[CMMotionManager alloc] init]; NSOperationQueue * _ operationQueue = [[NSOperationQueue alloc] init]; BOOL _ isShake; // whether it is shaking BOOL _ isOver = NO; //

I think it is easy to understand The difference is that an object will be deallocated as soon as there are no strong pointers to it. even if weak pointers point to it, once the last strong pointer is gone, the object will be deallocated, and all

1 PrefaceUse the CGAffineTransformMakeScale/CGContextScaleCTM function to create an auto scaling transform. 2. code exampleZYViewControllerView. m   [Plain]-(Void) drawRect :( CGRect) rect {CGMutablePathRef path = CGPathCreateMutable ();CGRect