本地化修改

1.删除不必要的lproj
2.简化本地化代码

Author: MJ Lee

Diff for: MJRefresh/Base/MJRefreshComponent.m

@@ -140,26 +140,20 @@ - (NSString *)localizedStringForKey:(NSString *)key{
 - (NSString *)localizedStringForKey:(NSString *)key withDefault:(NSString *)defaultString
 {
     static NSBundle *bundle = nil;
-    if (bundle == nil)
-    {
-        NSString *bundlePath = [[NSBundle mainBundle] pathForResource:@"MJRefresh" ofType:@"bundle"];
-        
-        bundle = [NSBundle bundleWithPath:bundlePath];
-        NSString *language = [[NSLocale preferredLanguages] count]? [NSLocale preferredLanguages][0]: @"en";
+    if (bundle == nil) {
+        // 获得设备的语言
+        NSString *language = [NSLocale preferredLanguages].firstObject;
+        // 如果是iOS9以上，截取前面的语言标识
         if ([UIDevice currentDevice].systemVersion.floatValue >= 9.0) {
             NSRange range = [language rangeOfString:@"-" options:NSBackwardsSearch];
             language = [language substringToIndex:range.location];
         }
-        if (![[bundle localizations] containsObject:language])
-        {
-            language = [language componentsSeparatedByString:@"-"][0];
-        }
-        if ([[bundle localizations] containsObject:language])
-        {
-            bundlePath = [bundle pathForResource:language ofType:@"lproj"];
+        
+        // 先从MJRefresh.bundle中查找资源
+        NSBundle *refreshBundle = [NSBundle bundleWithPath:[[NSBundle mainBundle] pathForResource:@"MJRefresh" ofType:@"bundle"]];
+        if ([refreshBundle.localizations containsObject:language]) {
+            bundle = [NSBundle bundleWithPath:[refreshBundle pathForResource:language ofType:@"lproj"]];
         }
-
-        bundle = [NSBundle bundleWithPath:bundlePath] ?: [NSBundle mainBundle];
     }
     defaultString = [bundle localizedStringForKey:key value:defaultString table:nil];
     return [[NSBundle mainBundle] localizedStringForKey:key value:defaultString table:nil];