Initial commit

2017-08-15 16:59:01 +08:00
commit bdc83e07ef
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+//
+//  UMAssetsCollectionCell.m
+//  UMCommunity
+//
+//  Created by luyiyuan on 14/9/9.
+//  Copyright (c) 2014年 Umeng. All rights reserved.
+//
+
+#import "UMAssetsCollectionCell.h"
+#import "UMAssetsCollectionGrid.h"
+#import "UMComResouceDefines.h"
+
+#define kPaddingX 5 // 左边距
+#define kPaddingY 5 // 上边距
+#define kSpaceX   5 // grid之间的水平边距
+#define kSpaceY   5 // grid之间的上下边距
+
+#define kTagPad  99
+
+#define NUMBER_FOR_INDEX(x) [NSNumber numberWithInt:x]
+
+static inline NSInteger tagToIndex(NSRange range,NSInteger tag)
+{
+    return range.location + tag - kTagPad;
+}
+
+
+@interface UMAssetsCollectionCell()
+
+@property (nonatomic,strong) NSMutableArray  *gridViews;
+@property (nonatomic,strong) NSMutableDictionary *assetsSelection;
+@property (nonatomic,strong) NSMutableArray *assetsSelectionArr;//选择的图片
+@property (nonatomic) NSRange range;
+@end
+
+@implementation UMAssetsCollectionCell
+
+- (id)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier
+{
+    self = [super initWithStyle:style reuseIdentifier:reuseIdentifier];
+    if (self) {
+        // Initialization code
+        self.backgroundColor = [UIColor whiteColor];
+        self.selectionStyle = UITableViewCellSelectionStyleNone;
+        
+        self.gridViews = [[NSMutableArray alloc]init];
+        
+        self.assetsSelectionArr = [NSMutableArray arrayWithCapacity:1];
+        
+        
+    }
+    return self;
+}
+
+- (void)setAssets:(NSArray *)assets
+        rowNumber:(NSUInteger)index
+           height:(NSUInteger)height
+        selection:(NSMutableDictionary *)selection
+            range:(NSRange)range
+{
+    self.assets = assets;
+    self.frame = CGRectMake(self.frame.origin.x, self.frame.origin.y, self.frame.size.width, height);
+    
+    self.assetsSelection = selection;
+    self.range = range;
+    
+    [self addGridViewsRowNumber:index
+                      rowHeight:height
+                      selection:selection
+                          range:range];
+}
+
+
+- (void)setAssets:(NSArray *)assets
+        rowNumber:(NSUInteger)index
+           height:(NSUInteger)height
+        selection:(NSMutableDictionary *)selection
+            range:(NSRange)range
+   selectionArray:(NSMutableArray *)selectionArray
+{
+    self.assets = assets;
+    self.frame = CGRectMake(self.frame.origin.x, self.frame.origin.y, self.frame.size.width, height);
+    
+    self.assetsSelection = selection;
+    self.range = range;
+    self.assetsSelectionArr = selectionArray;
+    [self addGridViewsRowNumber:index
+                      rowHeight:height
+                      selection:selection
+                          range:range];
+}
+
+
+- (void)addGridViewsRowNumber:(NSUInteger)index
+              rowHeight:(NSUInteger)rowHeight
+           selection:(NSMutableDictionary *)selection
+               range:(NSRange)range
+{
+    float width     = self.bounds.size.width  - 2*kPaddingX;
+    float height    = rowHeight - kSpaceY;
+    float fitWidth  = (width - kSpaceX*(4-1))/4;
+    float fitHeight = (index == 0 ? height - kSpaceY : height);
+    
+    float y = (index == 0 ? kSpaceY : 0);
+    
+    @autoreleasepool{
+        
+        for(int i=0;i<[self.assets count];i++)
+        {
+            UMAssetsCollectionGrid *grid =(UMAssetsCollectionGrid *)[self viewWithTag:i+kTagPad];
+            
+            CGRect frame = CGRectMake(kPaddingX+(i%(int)[self.assets count])*(fitWidth+kSpaceX),y, fitWidth, fitHeight);
+            
+            if(grid == nil)
+            {
+                grid =[[UMAssetsCollectionGrid alloc] initWithFrame:frame];
+                
+                [grid setAsset:self.assets[i]];
+                [grid setTag:i+kTagPad];
+                [self addSubview:grid];
+                
+                // 保存grid
+                [_gridViews addObject:grid];
+                
+                // 给Grid添加单击手势
+                UITapGestureRecognizer *tapGes = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(handleTap:)];
+                tapGes.numberOfTapsRequired = 1;
+                [grid addGestureRecognizer:tapGes];
+            }
+            else
+            {
+                NSNumber *number = [NSNumber numberWithInteger:tagToIndex(self.range,grid.tag)];
+                
+                if([self.assetsSelection objectForKey:number])
+                {
+                    [grid setIsSelected:YES];
+                }
+                else
+                {
+                    [grid setIsSelected:NO];
+                }
+                
+                [grid setFrame:frame];
+                [grid setAsset:self.assets[i]];
+            }
+            
+        }
+        
+    }
+}
+
+- (void)handleTap:(UITapGestureRecognizer *)tapGes
+{
+    
+    UMAssetsCollectionGrid *grid =(UMAssetsCollectionGrid *)[self viewWithTag:tapGes.view.tag];
+    
+    NSNumber *number = [NSNumber numberWithInteger:tagToIndex(self.range,grid.tag)];
+    
+    if ([self.assetsSelectionArr containsObject:number]) {
+        [self.assetsSelectionArr removeObject:number];
+    }
+    if([self.assetsSelection objectForKey:number])
+    {
+        [self.assetsSelection removeObjectForKey:number];
+    }
+    else
+    {
+        if([self.assetsSelection count]>=self.maximumNumberOfSelection)
+        {
+            UIAlertView *alert = [[UIAlertView alloc] initWithTitle:UMComLocalizedString(@"um_com_warning", @"警告") message:[NSString stringWithFormat:UMComLocalizedString(@"um_com_selectedMaxPics_template", @"当前最多选择%d张图片"),self.maximumNumberOfSelection] delegate:self cancelButtonTitle:UMComLocalizedString(@"um_com_ok", @"好的") otherButtonTitles:nil];
+            
+            [alert show];
+            return;
+        }
+        [self.assetsSelectionArr addObject:number];
+        [self.assetsSelection setObject:number forKey:number];
+    }
+    
+    
+    [grid setIsSelected:!grid.isSelected];
+}
+
+
+@end