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2014/10/15 ¤U¤È 10:13:47

iphone Programming Glossary: self.center.y

How to rotate and resize the image view with single finger

http://stackoverflow.com/questions/12566791/how-to-rotate-and-resize-the-image-view-with-single-finger

atan2 functions to solve the rotation problem like this float ang atan2 recognizer locationInView self.superview .y self.center.y recognizer locationInView self.superview .x self.center.x float angleDiff deltaAngle ang self.transform CGAffineTransformMakeRotation..

Car (Annotation) animation (like uber app) not working

http://stackoverflow.com/questions/19268080/car-annotation-animation-like-uber-app-not-working

self.layer addAnimation animation forKey POSITIONKEY NSLog @ setPosition ANIMATED x from f f to f f self self.center.x self.center.y toPos.x toPos.y self.center toPos previousPoint mapPoint My goal is to move car same like in uber app. iphone ios objective..

MKMapView ignores update of centerOffset in iOS 4

http://stackoverflow.com/questions/3136505/mkmapview-ignores-update-of-centeroffset-in-ios-4

so you need to realign their centers. Here's my case Selected Unselected self.center CGPointMake self.center.x 56.0 self.center.y 130.0 self.centerOffset CGPointMake 5.0 14.0 Unselected Selected self.center CGPointMake self.center.x 56.0 self.center.y.. 130.0 self.centerOffset CGPointMake 5.0 14.0 Unselected Selected self.center CGPointMake self.center.x 56.0 self.center.y 130.0 self.centerOffset CGPointMake 64.0 81.0 Where 130 is the difference in height between the views center point is at..

Rotating image using objective C

http://stackoverflow.com/questions/4010779/rotating-image-using-objective-c

allObjects objectAtIndex len CGPoint location touch locationInView self superview float theAngle atan2 location.y self.center.y location.x self.center.x totalRadians theAngle self rotateImage theAngle void touchesEnded NSSet touches withEvent UIEvent.. allObjects objectAtIndex len CGPoint location touch locationInView self superview float theAngle atan2 location.y self.center.y location.x self.center.x totalRadians fabs theAngle totalRadians totalRadians fmod totalRadians 2 M_PI self rotateImage..