IOS

1. Set the size of ImagePicker. ImagePicker is always displayed in the default size in Popover Controller. Setting the popoverContentSize attribute seems useless. The solution is to "include" ImagePicker to a custom ViewController, and then

1. Create a repository on github to store the project you will submit 2. Open the terminal to enter the root directory of your project and execute the following command Git commit-m In this way, a common project is initialized into a git project.

@ Property (nonatomic, getter = isUserInteractionEnabled) BOOL userInteractionEnabled; @ Property (nonatomic) NSInteger tag; @ Property (nonatomic) CGRect frame; @ Property (nonatomic) CGRect bounds; @ Property (nonatomic) CGPoint center; @

NSURL * url = [NSURL URLWithString: @ "sms: // 10010"]; [[UIApplication sharedApplication] openURL: url];-Simple-text message content cannot be specified and cannot be automatically returned to the original application If you want to customize

1. Classes are also objects A Class is a Class object. Class Type Definition Typedef objc_class * Class; A class name represents a Class Object. Each class has only one class object. Class person1 = [Person * p = [Person = [p

1. The description method is the NSObject method, including class and object methods. + (NSString *-(NSString * 2. By default, when NSLog and % @ are used to output objects, the class name and memory address are returned. 3. Modify the default

Use of NavigationBar 1. // use the setnavigationbarhidmethod of the navigation controller to hide the navigation bar [Self. navigationControllersetNavigationBarHidden: YES];   2. // the size of the navigation bar in the navigation controller is

Stroyboard can be seen as a collection of management View images. That is to say, there is no limit on one Storyboard in an iOS project.Therefore, in your APP project, you can place similar views in the same APP to form a group to facilitate

[UIDeviceUniqueIdentifier] One of the alternative methods specified in the document (there are three alternative methods in total ): UniqueIdentifierProperty Available in iOS 2.0 through iOS 6.1UniqueIdentifierAttribute can be used for iOS 2.0 to

IOS Project Development Layout 4 Add the UITabViewController control and the top scroll bar based on the previous frame. First, check the file layout as shown in Figure 1. Add the following to DemMainViewController: - (void)addMainController{ _

Since iOS after iPhone 4s supports BLE, the next generation of these iOS devices are not cheap. debugging with the iOS simulator during testing can save some development costs. How to debug BLE on the iOS simulator? Apple initially gave a

In the info. plist file, if the View controller-based status bar appearance item is set to YES, the View controller has a higher priority than the application setting. If the value is NO, the setting of the application prevails. The

I. Preface As a data carrier, databases are frequently used. Generally, the database is created in the Entry Method of the program. The following describes how to create a database through an instance. Ii. Requirements Create a test. sqlite database

The built-in iOS navigation is used in project development because it is difficult to modify the style. Here I write a similar switching method. I think it is quite useful, probably because the code is written by myself .. Attach the code

Touch events fall into three categories Touch events (single point, multi-touch, and various gesture operations) Sensor events (gravity, accelerometer, etc) Remote Control event (Remote Control of iOS device multimedia playback, etc)Touch events

I have added a new knowledge in iOS5, that is, ARC. In fact, I don't like it very much because I am used to managing the memory myself. However, learning is still necessary. During iOS development, attribute definitions are often related to retain,

Use UIEdgeInsetsMaketitle on UIButton to align with the image  Differences between contentSize, contentInset, and contentOffset To display a UIView at the very beginning, you only need to call the bringSubviewToFront () method of its parent view.

Before ios7, you can use this line of code in AppDelegate to hide the status bar: [[UIApplication sharedApplication] setStatusBarHidden:YES]; However, in ios7, this line of code does not take effect. You need to add a configuration in the plist

Development on the mobile platform focuses on data and data processing, event processing, and UI. Therefore, event distribution processing is a very important part, and it is also an important parameter for a platform. If the event distribution

Page Control Knowledge point: (1) Page Control The Page Control is used to create and Control Multiple View Controls in the iPhone SDK environment. It specifies a small dot for each view Control Page in the program and displays the current Page