У меня есть UIView
, это мой вид загрузки. Все, что он делает, это отображает круговой загрузочный круг (много-много "круг" для одного предложения).
Он отлично работает в первый раз, но после этого круг не центрируется. Он двигается влево и вниз по некоторым. Как сделать так, чтобы он всегда был в центре, помните, что я ограничил приложение отображением только в горизонтальных режимах (альбомная ориентация, горизонтальная ориентация вправо) во всех видах, чтобы проблема не возникала при повороте устройства.
вызов для загрузки представления:
loadingViewController = [LoadingViewController loadSpinnerIntoView:self.view];
LoadingViewController.h:
#import <UIKit/UIKit.h>
#import <QuartzCore/QuartzCore.h>
#import "CrestronClient.h"
@interface LoadingViewController : UIView
{
CrestronClient *cClient;
}
+(LoadingViewController *)loadSpinnerIntoView:(UIView *)superView;
-(void)removeLoadingView;
- (UIImage *)addBackground;
@end
LoadingView.m:
#import "LoadingViewController.h"
#import "RootViewController.h"
@implementation LoadingViewController
CGRect priorFrameSettings;
UIView *parentView;
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
// Return YES for supported orientations
if (interfaceOrientation == UIInterfaceOrientationLandscapeLeft ||interfaceOrientation == UIInterfaceOrientationLandscapeRight ) {
return YES;
}else{
return NO;
}
}
-(void)removeLoadingView
{
// [parentView setFrame:priorFrameSettings];
CATransition *animation = [CATransition animation];
[animation setType:kCATransitionFade];
[[[self superview] layer] addAnimation:animation forKey:@"layerAnimation"];
[self removeFromSuperview];
}
+(LoadingViewController *)loadSpinnerIntoView:(UIView *)superView
{
priorFrameSettings = superView.frame;
parentView = superView;
// [superView setFrame:CGRectMake(0, 0, 1024, 1024)];
// Create a new view with the same frame size as the superView
LoadingViewController *loadingViewController = [[LoadingViewController alloc] initWithFrame:superView.frame];
loadingViewController.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
// If something's gone wrong, abort!
if(!loadingViewController){ return nil; }
[superView addSubview:loadingViewController];
if(!loadingViewController){ return nil; }
// This is the new stuff here ;)
UIActivityIndicatorView *indicator =
[[[UIActivityIndicatorView alloc]
initWithActivityIndicatorStyle: UIActivityIndicatorViewStyleWhiteLarge] autorelease];
// Set the resizing mask so it's not stretched
UIImageView *background = [[UIImageView alloc] initWithImage:[loadingViewController addBackground]];
// Make a little bit of the superView show through
background.alpha = 0.7;
[loadingViewController addSubview:background];
indicator.autoresizingMask =
UIViewAutoresizingFlexibleTopMargin |
UIViewAutoresizingFlexibleRightMargin |
UIViewAutoresizingFlexibleBottomMargin |
UIViewAutoresizingFlexibleLeftMargin;
// Place it in the middle of the view
indicator.center = superView.center;
// Add it into the spinnerView
[loadingViewController addSubview:indicator];
// Start it spinning! Don't miss this step
[indicator startAnimating];
// Create a new animation
CATransition *animation = [CATransition animation];
// Set the type to a nice wee fade
[animation setType:kCATransitionFade];
// Add it to the superView
[[superView layer] addAnimation:animation forKey:@"layerAnimation"];
return loadingViewController;
}
- (UIImage *)addBackground{
cClient = [CrestronClient sharedManager];
if (cClient.isConnected == FALSE) {
[cClient connect];
}
// Create an image context (think of this as a canvas for our masterpiece) the same size as the view
UIGraphicsBeginImageContextWithOptions(self.bounds.size, YES, 1);
// Our gradient only has two locations - start and finish. More complex gradients might have more colours
size_t num_locations = 2;
// The location of the colors is at the start and end
CGFloat locations[2] = { 0.0, 1.0 };
// These are the colors! That's two RBGA values
CGFloat components[8] = {
0.4,0.4,0.4, 0.8,
0.1,0.1,0.1, 0.5 };
// Create a color space
CGColorSpaceRef myColorspace = CGColorSpaceCreateDeviceRGB();
// Create a gradient with the values we've set up
CGGradientRef myGradient = CGGradientCreateWithColorComponents (myColorspace, components, locations, num_locations);
// Set the radius to a nice size, 80% of the width. You can adjust this
float myRadius = (self.bounds.size.width*.8)/2;
// Now we draw the gradient into the context. Think painting onto the canvas
CGContextDrawRadialGradient (UIGraphicsGetCurrentContext(), myGradient, self.center, 0, self.center, myRadius, kCGGradientDrawsAfterEndLocation);
// Rip the 'canvas' into a UIImage object
UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
// And release memory
CGColorSpaceRelease(myColorspace);
CGGradientRelease(myGradient);
UIGraphicsEndImageContext();
// … obvious.
return image;
}
- (void)dealloc {
[super dealloc];
}
@end