Update project settings

WeChatTweak/Category/NSBundle+WeChatTweak.h

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+//
+//  NSBundle+WeChatTweak.h
+//  WeChatTweak
+//
+//  Created by Sunnyyoung on 2017/8/12.
+//  Copyright © 2017年 Sunnyyoung. All rights reserved.
+//
+
+#import <Cocoa/Cocoa.h>
+
+@interface NSBundle (WeChatTweak)
+
++ (instancetype)tweakBundle;
+
+@end

WeChatTweak/Category/NSBundle+WeChatTweak.m

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+//
+//  NSBundle+WeChatTweak.m
+//  WeChatTweak
+//
+//  Created by Sunnyyoung on 2017/8/12.
+//  Copyright © 2017年 Sunnyyoung. All rights reserved.
+//
+
+#import "NSBundle+WeChatTweak.h"
+
+@implementation NSBundle (WeChatTweak)
+
++ (instancetype)tweakBundle {
+    return [NSBundle bundleWithIdentifier:@"net.sunnyyoung.WeChatTweak"];
+}
+
+@end

WeChatTweak/Category/NSString+WeChatTweak.h

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+//
+//  NSString+WeChatTweak.h
+//  WeChatTweak
+//
+//  Created by Sunnyyoung on 2017/8/12.
+//  Copyright © 2017年 Sunnyyoung. All rights reserved.
+//
+
+#import <Cocoa/Cocoa.h>
+
+@interface NSString (WeChatTweak)
+
+- (NSString *)tweak_subStringFrom:(NSString *)beginString to:(NSString *)endString;
+
+@end

WeChatTweak/Category/NSString+WeChatTweak.m

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+//
+//  NSString+WeChatTweak.m
+//  WeChatTweak
+//
+//  Created by Sunnyyoung on 2017/8/12.
+//  Copyright © 2017年 Sunnyyoung. All rights reserved.
+//
+
+#import "NSString+WeChatTweak.h"
+
+@implementation NSString (WeChatTweak)
+
+- (NSString *)tweak_subStringFrom:(NSString *)beginString to:(NSString *)endString {
+    NSRange begin = [self rangeOfString:beginString];
+    NSRange end = [self rangeOfString:endString];
+    NSRange range = NSMakeRange(begin.location + begin.length, end.location - begin.location - begin.length);
+    return [self substringWithRange:range];
+}
+
+@end