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[英]How to handle UIView rounded corners (using CAShapeLayer) on rotation
[英]How custom UIView handle screen rotation
出于某种原因,我创建了一个自定义视图,覆盖了drawrect方法,以绘制一些字符串和img。 就像这样:
@implementation WaterMarkView
- (void)drawRect:(CGRect)rect {
NSLog(@"drawRect");
NSString* test = @"This is a test string";
NSDictionary *dict = @{NSFontAttributeName:[UIFont systemFontOfSize:22],
NSForegroundColorAttributeName:[UIColor colorWithRed:1.0 green:0.0 blue:0.0 alpha:1.0],
};
NSDictionary *attributes = [NSDictionary dictionaryWithObjectsAndKeys:[UIFont systemFontOfSize:16], NSFontAttributeName, nil];
CGSize strsize = [[[NSAttributedString alloc] initWithString:test attributes:attributes] size];
CGRect screentBounds = [[UIScreen mainScreen] bounds];
[test drawAtPoint:CGPointMake((screentBounds.size.width - strsize.width)/2,
(screentBounds.size.height - strsize.height)/2) withAttributes: dict];
}
@end
将其添加到viewController
....
WaterMarkView* view = [[WaterMarkView alloc] init];
view.backgroundColor = [UIColor whiteColor];
[self.view addSubview:view];
....
它工作正常。
但是,当屏幕旋转时,会清楚地看到字符串过渡不平滑而是难看。
当我添加一个UILable连字串时,屏幕旋转时它将平滑过渡
屏幕旋转时如何使自定义UIView过渡平滑?
只需将contentMode
设置为UIViewContentModeRedraw
,默认模式UIViewContentModeScaleToFill
将缩放内容。
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