PhotoMap/LoadingStatus.m

/*
     File: LoadingStatus.m
 Abstract: View for displaying the loading status.
  Version: 1.1
 
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 */
 
#import "LoadingStatus.h"
 
@interface LoadingStatus ()
 
@property (nonatomic, strong) UIActivityIndicatorView *progress;
@property (nonatomic, strong) UILabel *loadingLabel;
 
@end
 
 
#pragma mark -
 
@implementation LoadingStatus
 
+ (id)defaultLoadingStatusWithWidth:(CGFloat)width {
    
    return [[LoadingStatus alloc] initWithFrame:CGRectMake(0.0, 0.0, width, 40.0)];
}
 
- (id)initWithFrame:(CGRect)frame {
    
    if ((self = [super initWithFrame:frame])) {
        self.backgroundColor = [UIColor colorWithRed:0.0f green:0.0f blue:0.0f alpha:0.4f];
        
        NSString *loadingString = @"Loading Photos…";
 
        UIFont *loadingFont = [UIFont boldSystemFontOfSize:17.0f];
    
        NSDictionary *attrs = @{NSFontAttributeName:loadingFont};
        
        CGRect rect = [loadingString boundingRectWithSize:CGSizeMake(CGRectGetWidth(frame), CGRectGetHeight(frame))
                                         options:(NSStringDrawingUsesLineFragmentOrigin | NSStringDrawingUsesFontLeading)
                                      attributes:attrs
                                         context:nil];
        CGSize labelSize = rect.size;
        
        CGFloat centerX = floor((CGRectGetWidth(frame) / 2.0f) - (labelSize.width / 2.0f));
        CGFloat centerY = floor((CGRectGetHeight(frame) / 2.0f) - (labelSize.height / 2.0f));
        _loadingLabel = [[UILabel alloc] initWithFrame: CGRectMake(centerX, centerY, labelSize.width, labelSize.height)];
        self.loadingLabel.backgroundColor = [UIColor clearColor];
        self.loadingLabel.textColor = [UIColor whiteColor];
        self.loadingLabel.text = loadingString;
        self.loadingLabel.font = loadingFont;
        
        _progress = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhite];
        CGRect progressFrame = self.progress.frame;
        progressFrame.origin.x = centerX - CGRectGetWidth(progressFrame) - 8.0f;
        progressFrame.origin.y = centerY;
        self.progress.frame = progressFrame;
        
        [self addSubview:self.progress];
        [self addSubview:self.loadingLabel];
        
    }
    return self;
}
 
- (void)willRemoveSubview:(UIView *)subview {
    
    if (subview == self.progress)
        [self.progress stopAnimating];
    
    [super willRemoveSubview:subview];
}
 
- (void)didMoveToWindow {
    
    [super didMoveToWindow];
    
    [self.progress startAnimating];
}
 
- (void)removeFromSuperviewWithFade {
    
    [UIView animateWithDuration:0.3f animations:^(void) {
        self.alpha = 0.0f;
    } completion:^(BOOL finished) {
        if (finished) {
            [self removeFromSuperview];
        }
    }];
}
 
@end