新增iOS端图片动态转换尺寸 url 方法

Objective-C/EsttTransformPicUrl.h

@@ -0,0 +1,38 @@
+//
+//  EsttTransformPicUrl.h
+//  CKG
+//
+//  Created by ZhJ on 16/3/3.
+//  Copyright © 2016年 ESTT. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+
+@interface EsttTransformPicUrl : NSObject
+
+/**
+ * 获取原生大小图片地址
+ */
++ (NSURL *)transformToOriginSize:(NSURL *)picUrl;
+
+/**
+ * 获取固定大小图片地址
+ */
++ (NSURL *)transformUrl:(NSURL *)picUrl ToSize:(CGSize)confirmSize;
+
+/**
+ * 获取固定宽自动高图片地址
+ */
++ (NSURL *)transformUrl:(NSURL *)picUrl ToWidth:(CGFloat)width;
+
+/**
+ * 获取固定高自动宽图片地址
+ */
++ (NSURL *)transformUrl:(NSURL *)picUrl ToHeight:(CGFloat)height;
+
+/**
+ * 解析URL参数的工具方法。
+ */
++ (NSDictionary *)parseURLParams:(NSString *)query;
+
+@end

Objective-C/EsttTransformPicUrl.m

@@ -0,0 +1,172 @@
+//
+//  EsttTransformPicUrl.m
+//  CKG
+//
+//  Created by ZhJ on 16/3/3.
+//  Copyright © 2016年 ESTT. All rights reserved.
+//
+
+#import "EsttTransformPicUrl.h"
+
+#define BASE_HOST @"estt.com.cn"
+//#define BASE_HOST @"bzsns.cn"
+#define BASE_HOST_CHILDREN @[@"static",@"www",@"test",@"dev",@"fdfs"]
+
+@implementation EsttTransformPicUrl
+
+// 获取原生大小图片地址
++ (NSURL *)transformToOriginSize:(NSURL *)picUrl {
+
+    NSString *host = [picUrl host];
+
+    BOOL isOurServer = NO;
+    if ([host containsString:BASE_HOST]) {
+        NSMutableArray *childrenHost = [NSMutableArray arrayWithArray:BASE_HOST_CHILDREN];
+        NSString *child = [host componentsSeparatedByString:@"."][0];
+        isOurServer = [childrenHost containsObject:child]? YES : NO;
+    }
+
+    if (isOurServer) {
+        NSString *fileName = [[picUrl pathComponents] lastObject];
+
+        NSMutableString *newFileName = [NSMutableString stringWithString:[fileName copy]];
+        if ([fileName containsString:@"_"]) {
+            newFileName = [NSMutableString stringWithString:[fileName componentsSeparatedByString:@"_"][0]];
+        }
+
+        NSMutableString *picUrlStr = [NSMutableString stringWithString:[picUrl absoluteString]];
+        [picUrlStr replaceCharactersInRange:[picUrlStr rangeOfString:fileName] withString:newFileName];
+
+        NSURL *newPicUrl = [NSURL URLWithString:picUrlStr];
+
+        return newPicUrl;
+    } else {
+        return picUrl;
+    }
+}
+
+// 获取固定大小图片地址
++ (NSURL *)transformUrl:(NSURL *)picUrl ToSize:(CGSize)confirmSize {
+
+    NSString *host = [picUrl host];
+
+    BOOL isOurServer = NO;
+    if ([host containsString:BASE_HOST]) {
+        NSMutableArray *childrenHost = [NSMutableArray arrayWithArray:BASE_HOST_CHILDREN];
+        NSString *child = [host componentsSeparatedByString:@"."][0];
+        isOurServer = [childrenHost containsObject:child]? YES : NO;
+    }
+
+    if (isOurServer) {
+        NSString *fileName = [[picUrl pathComponents] lastObject];
+
+        NSMutableString *newFileName = [NSMutableString stringWithString:[fileName copy]];
+        NSMutableString *picUrlStr = [NSMutableString stringWithString:[picUrl absoluteString]];
+        NSURL *newPicUrl;
+        if ([fileName containsString:@"_"]) {
+            newFileName = [NSMutableString stringWithString:[fileName componentsSeparatedByString:@"_"][0]];
+            [picUrlStr replaceCharactersInRange:[picUrlStr rangeOfString:fileName] withString:newFileName];
+            newPicUrl = [NSURL URLWithString:picUrlStr];
+        }
+
+        NSString *sizeStr = [NSString stringWithFormat:@"_%.fx%.f.png", confirmSize.width*1.5, confirmSize.height*1.5];
+        [newFileName appendString:sizeStr];
+        fileName = [[picUrl pathComponents] lastObject];
+        [picUrlStr replaceCharactersInRange:[picUrlStr rangeOfString:fileName] withString:newFileName];
+        newPicUrl = [NSURL URLWithString:picUrlStr];
+
+        return newPicUrl;
+    } else {
+        return picUrl;
+    }
+}
+
+// 获取固定宽自动高图片地址
++ (NSURL *)transformUrl:(NSURL *)picUrl ToWidth:(CGFloat)width {
+
+    NSString *host = [picUrl host];
+
+    BOOL isOurServer = NO;
+    if ([host containsString:BASE_HOST]) {
+        NSMutableArray *childrenHost = [NSMutableArray arrayWithArray:BASE_HOST_CHILDREN];
+        NSString *child = [host componentsSeparatedByString:@"."][0];
+        isOurServer = [childrenHost containsObject:child]? YES : NO;
+    }
+
+    if (isOurServer) {
+        NSString *fileName = [[picUrl pathComponents] lastObject];
+
+        NSMutableString *newFileName = [NSMutableString stringWithString:[fileName copy]];
+        NSMutableString *picUrlStr = [NSMutableString stringWithString:[picUrl absoluteString]];
+        NSURL *newPicUrl;
+        if ([fileName containsString:@"_"]) {
+            newFileName = [NSMutableString stringWithString:[fileName componentsSeparatedByString:@"_"][0]];
+            [picUrlStr replaceCharactersInRange:[picUrlStr rangeOfString:fileName] withString:newFileName];
+            newPicUrl = [NSURL URLWithString:picUrlStr];
+        }
+
+        NSString *sizeStr = [NSString stringWithFormat:@"_%.f-.jpg", width*1.5];
+        [newFileName appendString:sizeStr];
+        fileName = [[picUrl pathComponents] lastObject];
+        [picUrlStr replaceCharactersInRange:[picUrlStr rangeOfString:fileName] withString:newFileName];
+        newPicUrl = [NSURL URLWithString:picUrlStr];
+
+        return newPicUrl;
+    } else {
+        return picUrl;
+    }
+}
+
+// 获取固定高自动宽图片地址
++ (NSURL *)transformUrl:(NSURL *)picUrl ToHeight:(CGFloat)height {
+
+    NSString *host = [picUrl host];
+
+    BOOL isOurServer = NO;
+    if ([host containsString:BASE_HOST]) {
+        NSMutableArray *childrenHost = [NSMutableArray arrayWithArray:BASE_HOST_CHILDREN];
+        NSString *child = [host componentsSeparatedByString:@"."][0];
+        isOurServer = [childrenHost containsObject:child]? YES : NO;
+    }
+
+    if (isOurServer) {
+        NSString *fileName = [[picUrl pathComponents] lastObject];
+
+        NSMutableString *newFileName = [NSMutableString stringWithString:[fileName copy]];
+        NSMutableString *picUrlStr = [NSMutableString stringWithString:[picUrl absoluteString]];
+        NSURL *newPicUrl;
+        if ([fileName containsString:@"_"]) {
+            newFileName = [NSMutableString stringWithString:[fileName componentsSeparatedByString:@"_"][0]];
+            [picUrlStr replaceCharactersInRange:[picUrlStr rangeOfString:fileName] withString:newFileName];
+            newPicUrl = [NSURL URLWithString:picUrlStr];
+        }
+
+        NSString *sizeStr = [NSString stringWithFormat:@"_-%.f.jpg", height*1.5];
+        [newFileName appendString:sizeStr];
+        fileName = [[picUrl pathComponents] lastObject];
+        [picUrlStr replaceCharactersInRange:[picUrlStr rangeOfString:fileName] withString:newFileName];
+        newPicUrl = [NSURL URLWithString:picUrlStr];
+
+        return newPicUrl;
+    } else {
+        return picUrl;
+    }
+}
+
+/**
+ * 解析URL参数的工具方法。
+ */
++ (NSDictionary *)parseURLParams:(NSString *)query{
+    NSArray *pairs = [query componentsSeparatedByString:@"&"];
+    NSMutableDictionary *params = [[NSMutableDictionary alloc] init];
+    for (NSString *pair in pairs) {
+        NSArray *kv = [pair componentsSeparatedByString:@"="];
+        if (kv.count == 2) {
+            NSString *val =[[kv objectAtIndex:1] stringByReplacingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
+            [params setObject:val forKey:[kv objectAtIndex:0]];
+        }
+    }
+    return params;
+}
+
+@end