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random has asked 50 questions and find answers to 19 problems.

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Adding CALayer to UITableViewCell removed after scroll
Xcode build but not run on device
Swift optionals confusion
Determine when UITableViewCell is deallocated
setTorchModeOnWithLevel not working
Animating objects from off screen loss of response
Writing my own block method
NSTimer and NSRunLoop
Force lock screen
registerUserNotificationSettings not showing prompt iOS 8

random answers

Adding CALayer to UITableViewCell removed after scroll
How to share data between view controllers that are not directly connected by segues
Easier way to select all rows in UITableView
How to tell a viewcontroller to update its UI from another class
ld: framework not found Parse Xcode 7 beta
In Objective-C Check an array of Boolean Values and see if at least ONE is YES
UIViewContentModeScale mode of the cell image change silently after the cell is touched(highlighted)
swift: reload view for displaying new data in chart
Force lock screen
UITextView content going under UINavigationBar