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ImageSizeManager.m
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executable file
·112 lines (97 loc) · 3.47 KB
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//
// ImageSizeManager.m
// Coding_iOS
//
// Created by 王 原闯 on 14-10-13.
// Copyright (c) 2014年 Coding. All rights reserved.
//
#define kPath_ImageSizeDict @"ImageSizeDict"
#define kImageSizeManager_maxCount 1000
#define kImageSizeManager_resetCount (kImageSizeManager_maxCount/2)
#import "ImageSizeManager.h"
@interface ImageSizeManager ()
@property (strong, nonatomic) NSMutableDictionary *imageSizeDict;
@end
@implementation ImageSizeManager
+ (instancetype)shareManager{
static ImageSizeManager *shared_manager = nil;
static dispatch_once_t pred;
dispatch_once(&pred, ^{
shared_manager = [[self alloc] init];
[shared_manager read];
});
return shared_manager;
}
- (NSMutableDictionary *)read{
if (!_imageSizeDict) {
NSString *abslutePath = [NSString stringWithFormat:@"%@/%@.plist", [NSObject pathInCacheDirectory:kPath_ImageSizeDict], kPath_ImageSizeDict];
_imageSizeDict = [NSMutableDictionary dictionaryWithContentsOfFile:abslutePath];
if (!_imageSizeDict) {
_imageSizeDict = [NSMutableDictionary dictionary];
}
}
return _imageSizeDict;
}
- (BOOL)save{
if (_imageSizeDict) {
if ([NSObject createDirInCache:kPath_ImageSizeDict]) {
NSString *abslutePath = [NSString stringWithFormat:@"%@/%@.plist", [NSObject pathInCacheDirectory:kPath_ImageSizeDict], kPath_ImageSizeDict];
return [_imageSizeDict writeToFile:abslutePath atomically:YES];
}
}
return NO;
}
- (void)saveImage:(NSString *)imagePath size:(CGSize)size{
if (imagePath && ![_imageSizeDict objectForKey:imagePath]) {
[_imageSizeDict setObject:[NSNumber numberWithFloat:size.height/size.width] forKey:imagePath];
}
}
- (CGFloat)sizeOfImage:(NSString *)imagePath{
CGFloat imageSize = 1;
NSNumber *sizeValue = [_imageSizeDict objectForKey:imagePath];
if (sizeValue) {
imageSize = sizeValue.floatValue;
}
return imageSize;
}
- (BOOL)hasSrc:(NSString *)src{
NSNumber *sizeValue = [_imageSizeDict objectForKey:src];
BOOL hasSrc = NO;
if (sizeValue) {
hasSrc = YES;
}
return hasSrc;
}
#pragma mark Image Resize (used in tweet and message)
- (CGSize)sizeWithImageH_W:(CGFloat)height_width originalWidth:(CGFloat)originalWidth{
CGSize reSize = CGSizeZero;
reSize.width = originalWidth;
reSize.height = originalWidth *height_width;
return reSize;
}
- (CGSize)sizeWithSrc:(NSString *)src originalWidth:(CGFloat)originalWidth maxHeight:(CGFloat)maxHeight{
CGSize reSize = [self sizeWithImageH_W:[self sizeOfImage:src] originalWidth:originalWidth];
if (reSize.height > maxHeight) {
reSize.height = maxHeight;
}
return reSize;
}
- (CGSize)sizeWithImage:(UIImage *)image originalWidth:(CGFloat)originalWidth maxHeight:(CGFloat)maxHeight{
CGSize reSize = [self sizeWithImageH_W:(image.size.height/image.size.width) originalWidth:originalWidth];
if (reSize.height > maxHeight) {
reSize.height = maxHeight;
}
return reSize;
}
- (CGSize)sizeWithSrc:(NSString *)src originalWidth:(CGFloat)originalWidth maxHeight:(CGFloat)maxHeight minWidth:(CGFloat)minWidth{
CGSize reSize = [self sizeWithImageH_W:[self sizeOfImage:src] originalWidth:originalWidth];
CGFloat scale = maxHeight/reSize.height;
if (scale < 1) {
reSize = CGSizeMake(reSize.width *scale, reSize.height*scale);
}
if (reSize.width < minWidth) {
reSize.width = minWidth;
}
return reSize;
}
@end