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138 lines
4 KiB
Objective-C
138 lines
4 KiB
Objective-C
//
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// FullImageViewController.m
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// Signal
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//
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// Created by Dylan Bourgeois on 11/11/14.
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// Copyright (c) 2014 Open Whisper Systems. All rights reserved.
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//
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#import "FullImageViewController.h"
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#import "DJWActionSheet.h"
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@interface FullImageViewController () <UIScrollViewDelegate>
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@end
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@implementation FullImageViewController
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- (void)viewDidLoad {
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[super viewDidLoad];
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_fullImageView.image = _image;
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[self initializeScrollView];
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}
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- (void)didReceiveMemoryWarning {
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[super didReceiveMemoryWarning];
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// Dispose of any resources that can be recreated.
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}
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#pragma mark - Initializer
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-(void)initializeScrollView
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{
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UITapGestureRecognizer *doubleTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleDoubleTap:)];
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[doubleTap setNumberOfTapsRequired:2];
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[_pinchView addGestureRecognizer:doubleTap];
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_pinchView.delegate = self;
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_pinchView.minimumZoomScale=0.9f;
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_pinchView.maximumZoomScale=3.0f;
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_pinchView.showsVerticalScrollIndicator = NO;
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_pinchView.showsHorizontalScrollIndicator = NO;
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_pinchView.contentSize=CGSizeMake(CGRectGetWidth(_fullImageView.frame), CGRectGetHeight(_fullImageView.frame));
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}
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#pragma mark - IBAction
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-(IBAction)close:(id)sender
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{
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[self dismissViewControllerAnimated:YES completion:nil];
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}
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-(IBAction)more:(id)sender
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{
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[DJWActionSheet showInView:self.view
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withTitle:@"Options"
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cancelButtonTitle:@"Cancel"
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destructiveButtonTitle:nil
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otherButtonTitles:@[@"Save to Camera Roll", @"Delete"]
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tapBlock:^(DJWActionSheet *actionSheet, NSInteger tappedButtonIndex) {
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if (tappedButtonIndex == actionSheet.cancelButtonIndex) {
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NSLog(@"User Cancelled");
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} else if (tappedButtonIndex == actionSheet.destructiveButtonIndex) {
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NSLog(@"Destructive button tapped");
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}else {
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NSLog(@"The user tapped button at index: %li", (long)tappedButtonIndex);
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}
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}];
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}
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#pragma mark - Scroll View
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- (UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView
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{
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return _fullImageView;
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}
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- (IBAction)handleDoubleTap:(id)sender {
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CGFloat desiredScale = [self doubleTapDestinationZoomScale];
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CGPoint center = [(UITapGestureRecognizer*)sender locationInView:_fullImageView];
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CGRect zoomRect = [self zoomRectForScale:desiredScale withCenter:center];
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[_pinchView zoomToRect:zoomRect animated:YES];
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[_pinchView setZoomScale:desiredScale animated:YES];
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}
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- (CGRect)zoomRectForScale:(CGFloat)scale withCenter:(CGPoint)center {
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CGRect zoomRect;
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zoomRect.size.height = CGRectGetHeight(_pinchView.frame) / scale;
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zoomRect.size.width = CGRectGetWidth(_pinchView.frame) / scale;
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zoomRect.origin.x = center.x - ((CGRectGetWidth(zoomRect) / 2.0f));
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zoomRect.origin.y = center.y - ((CGRectGetHeight(zoomRect) / 2.0f));
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return zoomRect;
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}
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- (CGFloat)doubleTapDestinationZoomScale
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{
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BOOL cond = _pinchView.zoomScale == _pinchView.maximumZoomScale;
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return cond ? _pinchView.minimumZoomScale : _pinchView.maximumZoomScale;
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}
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#pragma mark - Layout
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-(void)centerInSuperview
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{
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CGRect frame = _fullImageView.frame;
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CGRect superviewFrame = self.view.frame;
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CGFloat dy = (CGRectGetHeight(superviewFrame) - CGRectGetHeight(frame)) / 2.0f;
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frame.origin.y = dy;
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CGFloat dx = (CGRectGetWidth(superviewFrame) - CGRectGetWidth(frame)) / 2.0f;
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frame.origin.x = dx;
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_fullImageView.frame = frame;
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}
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/*
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#pragma mark - Navigation
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// In a storyboard-based application, you will often want to do a little preparation before navigation
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- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
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// Get the new view controller using [segue destinationViewController].
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// Pass the selected object to the new view controller.
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}
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*/
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@end
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