kmpdfkit_demo/PDFViewer/Source/PDFToolbar/PDFTitleView.m

//
//  PDFTitleView.m
//  PDFReader
//
//  Copyright © 2014-2022 PDF Technologies, Inc. All Rights Reserved.
//
//  The PDF Reader Sample applications are licensed with a modified BSD license.
//  Please see License for details. This notice may not be removed from this file.
//

#import "PDFTitleView.h"

@interface PDFTitleView ()

@property (nonatomic,retain) UILabel *titleLabel;

@end

@implementation PDFTitleView

#pragma mark - Init Methods

- (instancetype)initWithTitle:(NSString *)title {
    self = [super init];
    if (self){
        _titleLabel = ({
            UILabel *label = [UILabel new];
            label.text = title;
            label.numberOfLines = 2;
            label.lineBreakMode = NSLineBreakByTruncatingMiddle;
            label.textAlignment = NSTextAlignmentCenter;
            label.textColor = [UIColor whiteColor];
            [self addSubview:label];
            label;
        });
        
        self.backgroundColor = [UIColor colorWithWhite:0.0 alpha:0.6];
        self.layer.cornerRadius = 3;
        self.clipsToBounds = YES;
    }
    return self;
}

- (void)dealloc {
    [_titleLabel release];
    [super dealloc];
}

#pragma mark - Public Methods

- (void)showInView:(UIView *)view hideAfter:(NSTimeInterval)delay complete:(void (^)())completeHandle {
    if (self.superview) {
        if ([self.superview isEqual:view]) {
            return;
        } else {
            [self removeFromSuperview];
        }
    }

    CGSize size = [self.titleLabel sizeThatFits:CGSizeMake(view.frame.size.width-54, MAXFLOAT)];
    self.frame = CGRectMake((view.frame.size.width-(size.width+10))/2.0,
                            70, size.width+10, size.height+10);
    self.alpha = 1.0;
    self.titleLabel.frame = CGRectMake(5, 5, self.frame.size.width-10, self.frame.size.height-10);
    self.autoresizingMask = UIViewAutoresizingFlexibleLeftMargin|UIViewAutoresizingFlexibleRightMargin;
    [view addSubview:self];
    
    dispatch_after(dispatch_time(DISPATCH_TIME_NOW, delay * NSEC_PER_SEC), dispatch_get_main_queue(), ^{
        [UIView animateWithDuration:0.3 animations:^{
            self.alpha = 0.0;
        } completion:^(BOOL finished) {
            if (completeHandle) {
                completeHandle();
            }
            [self removeFromSuperview];
        }];
    });
}

@end