Here is how to create thumbnail for videos. Two steps:
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I got this error because I mistyped the Link to link.
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Continue after GCD Note 1.
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Before talking about strongSelf and weakSelf, I need briefly explain retain cycle.
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GCD is the short form of Grand Central Dispatch. To understand GCD, there are several concepts needed to be known.
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Learning notes for book iOS Animations by Tutorials.
Auto layout is a powerful tool to create app interface. Developers can pre-set the constraints for a view. How to change a certain constraint to create animation?
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Learning notes for book iOS Animations by Tutorials.
When a view has several stages of moving animation, it is complicated to use animateWithDuration to implement the animation because it will contain nasty nesting in your code.
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Learning notes for book iOS Animations by Tutorials.
The UIView transform property is of type CGAffineTransform, and is used to represent a two-dimensional rotation, scale, or translation. By changing it, you can rotate, scale or translate a view.
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