2014/10/15 下午 10:14:11

iphone Programming Glossary: shouldrasterize

UITableView cornerRadius with border performance issues on iOS

http://stackoverflow.com/questions/11224955/uitableview-cornerradius-with-border-performance-issues-on-ios

happens Many Thanks iphone ios uitableview scrolling cornerradius share improve this question CALayer having shouldRasterize property for this type of performance issue. Just set self.tableView.layer.shouldRasterize YES This single line saved my..

Can't add a corner radius and a shadow

http://stackoverflow.com/questions/3316424/cant-add-a-corner-radius-and-a-shadow

self bounds cornerRadius 12.0f CGPath You might want to check your performance without the shouldRasterize parameter set once you're setting the shadow path. Drawing performance tends to be very good once you've set a shadow path... setShadowOpacity 0.4 layer setCornerRadius 12.0f If you still need better performance you can go ahead and set the shouldRasterize parameter as well layer setShouldRasterize YES And speaking of performance it's worth noting that if you are noticing sluggish..

Performance scrolling and retina resolution images in CALayer

http://stackoverflow.com/questions/4475127/performance-scrolling-and-retina-resolution-images-in-calayer

child views made up of images text and buttons in the UIView. In order to get decent scrolling performance I set shouldRasterize YES on the layer in the UIView. This worked great in that performance increased so I have smooth scrolling and doesn't pose.. scrolling and doesn't pose an issue since my graphics are static once drawn. However the problem is that when I set shouldRasterize that the rasterized graphics are blurry and low resolution on a Retina display. Is there a way to have high resolution graphics..

Core Animation CALayer mask animation performance

http://stackoverflow.com/questions/4520941/core-animation-calayer-mask-animation-performance

scale maskLayer.rasterizationScale UIScreen mainScreen scale maskLayer.contents id symbolImage.CGImage maskLayer.shouldRasterize YES maskLayer.opaque YES fgLayer CALayer layer retain fgLayer.frame self.layer.frame fgLayer.backgroundColor UIColor colorWithImageNamed.. UIColor colorWithImageNamed @ tabbar normal bg.png .CGColor fgLayer.mask maskLayer Apply the mask fgLayer.shouldRasterize YES fgLayer.opaque YES self.layer addSublayer fgLayer Note in the screenshot above you can see I've also added a shadow.. layer's contents. One other thing. I haven't figured out why yet but I've also noticed performance issues when I apply shouldRasterize on each layer instead of just the top layer. You might see if removing the reference to setShouldRasterize YES in your mask..