objective-c Archives - Page 25 of 28

How to hide UINavigationBar 1px bottom line

I have an app that sometimes needs its navigation bar to blend in with the content. Does anyone know how to get rid ...

May 3, 2022
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How to programmatically send SMS on the iPhone?

Does anybody know if it’s possible, and how, to programmatically send a SMS from the iPhone, with the official SDK / Cocoa Touch? ...

May 2, 2022
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How do I create a basic UIButton programmatically?

How can I create a basic UIButton programmatically? For example in my view controller, when executing the viewDidLoad method, three UIButtons will be ...

May 1, 2022
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Should IBOutlets be strong or weak under ARC?

I am developing exclusively for iOS 5 using ARC. Should IBOutlets to UIViews (and subclasses) be strong or weak? The following: @property (nonatomic, ...

May 1, 2022
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@synthesize vs @dynamic, what are the differences?

What are the differences between implementing a @property with @dynamic or @synthesize? 8 s 8 @synthesize will generate getter and setter methods for ...

May 1, 2022
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In Objective-C, how do I test the object type?

I need to test whether the object is of type NSString or UIImageView. How can I accomplish this? Is there some type of ...

May 1, 2022
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dispatch_after – GCD in Swift?

I’ve gone through the iBook from Apple, and couldn’t find any definition of it: Can someone explain the structure of dispatch_after? dispatch_after(<#when: dispatch_time_t#>, ...

April 30, 2022
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How to convert an NSString into an NSNumber

How can I convert a NSString containing a number of any primitive data type (e.g. int, float, char, unsigned int, etc.)? The problem ...

April 30, 2022
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UITextField text change event

How can I detect any text changes in a textField? The delegate method shouldChangeCharactersInRange works for something, but it did not fulfill my ...

April 29, 2022
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Location Services not working in iOS 8

My app that worked fine on iOS 7 doesn’t work with the iOS 8 SDK. CLLocationManager doesn’t return a location, and I don’t see my ...

April 29, 2022
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