diff --git a/README.md b/README.md
index 3382d2c..f6b755c 100644
--- a/README.md
+++ b/README.md
@@ -1,8 +1,10 @@
 LxFTPRequest
 ============
+
 Installation
 ------------
 Only need add LxFTPRequest.h and LxFTPRequest.m to your project.
+
 Introduction
 ------------
         A convenient FTP Request library. Support progress tracking, Breakpoint continuingly etc.
@@ -15,32 +17,31 @@ Support
         Both support iOS and Mac OS X platforms.
         Minimum support iOS version: iOS 5.0
         Minimum support OS X version: Mac OS X 10.7
+
 Podfile
 ------------
-        pod 'LxFTPRequest', '~> 1.0.0'
+        pod 'LxFTPRequest', '~> 1.1.1'
+
 How to use
 -----------
         #import "LxFTPRequest.h"
 ### Get resource list:
 
-            LxFTPRequest * request = [LxFTPRequest resourceListRequest];
-            request.serverURL = [[NSURL URLWithString:FTP_SCHEME_HOST]URLByAppendingPathComponent:SUB_DIRECTORY];
-            request.username = USERNAME;
-            request.password = PASSWORD;
-            request.progressAction = ^(NSInteger totalSize, NSInteger finishedSize, CGFloat finishedPercent) {
-            
-                NSLog(@"totalSize = %ld, finishedSize = %ld, finishedPercent = %f", totalSize, finishedSize, finishedPercent); 
-            };
-            request.successAction = ^(Class resultClass, id result) {
-                               
-                NSArray * resultArray = (NSArray *)result;
-                NSLog(@"resultArray = %@", resultArray);  
-            };
-            request.failAction = ^(CFStreamErrorDomain domain, NSInteger error, NSString *errorMessage) {
-            
-                NSLog(@"domain = %ld, error = %ld", domain, error);
-            };
-            [request start];
+        LxFTPRequest * request = [LxFTPRequest resourceListRequest];
+        request.serverURL = [[NSURL URLWithString:FTP_SCHEME_HOST]URLByAppendingPathComponent:SUB_DIRECTORY];
+        request.username = USERNAME;
+        request.password = PASSWORD;
+        request.progressAction = ^(NSInteger totalSize, NSInteger finishedSize, CGFloat finishedPercent) {
+            NSLog(@"totalSize = %ld, finishedSize = %ld, finishedPercent = %f", totalSize, finishedSize, finishedPercent); 
+        };
+        request.successAction = ^(Class resultClass, id result) {
+            NSArray * resultArray = (NSArray *)result;
+            NSLog(@"resultArray = %@", resultArray);  
+        };
+        request.failAction = ^(CFStreamErrorDomain domain, NSInteger error, NSString *errorMessage) {
+            NSLog(@"domain = %ld, error = %ld", domain, error);
+        };
+        [request start];
 
 ### Download resource:
 
@@ -54,85 +55,75 @@ How to use
             [[NSFileManager defaultManager]removeItemAtPath:LOCAL_FILE_PATH error:&error];
         */
 
-            LxFTPRequest * request = [LxFTPRequest downloadRequest];
-            request.serverURL = [NSURL URLWithString:FTP_RESOURCE_ADDRESS];
-            request.localFileURL = [NSURL fileURLWithPath:LOCAL_FILE_PATH];
-            request.username = USERNAME;
-            request.password = PASSWORD;
-            request.progressAction = ^(NSInteger totalSize, NSInteger finishedSize, CGFloat finishedPercent) {
-                
-                NSLog(@"totalSize = %ld, finishedSize = %ld, finishedPercent = %f", totalSize, finishedSize, finishedPercent); 
-            };
-            request.successAction = ^(Class resultClass, id result) {
-                
-                NSLog(@"resultClass = %@, result = %@", resultClass, result);  
-            };
-            request.failAction = ^(CFStreamErrorDomain domain, NSInteger error, NSString *errorMessage) {
-                
-                NSLog(@"domain = %ld, error = %ld", domain, error);
-            };
-            [request start];
+        LxFTPRequest * request = [LxFTPRequest downloadRequest];
+        request.serverURL = [NSURL URLWithString:FTP_RESOURCE_ADDRESS];
+        request.localFileURL = [NSURL fileURLWithPath:LOCAL_FILE_PATH];
+        request.username = USERNAME;
+        request.password = PASSWORD;
+        request.progressAction = ^(NSInteger totalSize, NSInteger finishedSize, CGFloat finishedPercent) {
+            NSLog(@"totalSize = %ld, finishedSize = %ld, finishedPercent = %f", totalSize, finishedSize, finishedPercent); 
+        };
+        request.successAction = ^(Class resultClass, id result) {
+            NSLog(@"resultClass = %@, result = %@", resultClass, result);  
+        };
+        request.failAction = ^(CFStreamErrorDomain domain, NSInteger error, NSString *errorMessage) {
+            NSLog(@"domain = %ld, error = %ld", domain, error);
+        };
+        [request start];
             
 ### Upload resource:
 
-            LxFTPRequest * request = [LxFTPRequest uploadRequest];
-            request.serverURL = [NSURL URLWithString:FTP_SCHEME_HOST]URLByAppendingPathComponent:FILE_PATH];
-            request.localFileURL = [NSURL fileURLWithPath:LOCAL_FILE_SAVE_PATH];
-            request.username = USERNAME;
-            request.password = PASSWORD;
-            request.progressAction = ^(NSInteger totalSize, NSInteger finishedSize, CGFloat finishedPercent) {
-                
-                NSLog(@"totalSize = %ld, finishedSize = %ld, finishedPercent = %f", totalSize, finishedSize, finishedPercent); 
-            };
-            request.successAction = ^(Class resultClass, id result) {
-                
-                NSLog(@"resultClass = %@, result = %@", resultClass, result);
-            };
-            request.failAction = ^(CFStreamErrorDomain domain, NSInteger error, NSString *errorMessage) {
-                
-                NSLog(@"domain = %ld, error = %ld", domain, error);
-            };
-            [request start];
+        LxFTPRequest * request = [LxFTPRequest uploadRequest];
+        request.serverURL = [NSURL URLWithString:FTP_SCHEME_HOST]URLByAppendingPathComponent:FILE_PATH];
+        request.localFileURL = [NSURL fileURLWithPath:LOCAL_FILE_SAVE_PATH];
+        request.username = USERNAME;
+        request.password = PASSWORD;
+        request.progressAction = ^(NSInteger totalSize, NSInteger finishedSize, CGFloat finishedPercent) {
+            NSLog(@"totalSize = %ld, finishedSize = %ld, finishedPercent = %f", totalSize, finishedSize, finishedPercent); 
+        };
+        request.successAction = ^(Class resultClass, id result) {
+            NSLog(@"resultClass = %@, result = %@", resultClass, result);
+        };
+        request.failAction = ^(CFStreamErrorDomain domain, NSInteger error, NSString *errorMessage) {
+            NSLog(@"domain = %ld, error = %ld", domain, error);
+        };
+        [request start];
             
-
 ### Create file or directory on ftp server:
 
-            LxFTPRequest * request = [LxFTPRequest createResourceRequest];
-            request.serverURL = [NSURL URLWithString:FTP_RESOURCE_PATH];    // directory path should be end up with '/'
-            request.username = USERNAME;
-            request.password = PASSWORD;
-            request.successAction = ^(Class resultClass, id result) {
-                
-                NSLog(@"resultClass = %@, result = %@", resultClass, result);
-            };
-            request.failAction = ^(CFStreamErrorDomain domain, NSInteger error, NSString *errorMessage) {
-                
-                NSLog(@"domain = %ld, error = %ld", domain, error);
-            };
-            [request start];
+        LxFTPRequest * request = [LxFTPRequest createResourceRequest];
+        request.serverURL = [NSURL URLWithString:FTP_RESOURCE_PATH];    // directory path should be end up with '/'
+        request.username = USERNAME;
+        request.password = PASSWORD;
+        request.successAction = ^(Class resultClass, id result) {
+            NSLog(@"resultClass = %@, result = %@", resultClass, result);
+        };
+        request.failAction = ^(CFStreamErrorDomain domain, NSInteger error, NSString *errorMessage) {
+            NSLog(@"domain = %ld, error = %ld", domain, error);
+        };
+        [request start];
 
 ### Delete file or directory on ftp server:
 
         /**
-            The directory which is not empty CANNOT BE DELETED !!!
+            CANNOT DELETE EMPTY DIRECTORY!!!
         */
-
-            LxFTPRequest * request = [LxFTPRequest destoryResourceRequest];
-            request.serverURL = [NSURL URLWithString:FTP_RESOURCE_PATH];
-            request.username = USERNAME;
-            request.password = PASSWORD;
-            request.successAction = ^(Class resultClass, id result) {
-                
-                NSLog(@"resultClass = %@, result = %@", resultClass, result);
-            };
-            request.failAction = ^(CFStreamErrorDomain domain, NSInteger error, NSString *errorMessage) {
-                
-                NSLog(@"domain = %ld, error = %ld", domain, error);
-            };
-            [request start];
+        LxFTPRequest * request = [LxFTPRequest destoryResourceRequest];
+        request.serverURL = [NSURL URLWithString:FTP_RESOURCE_PATH];
+        request.username = USERNAME;
+        request.password = PASSWORD;
+        request.successAction = ^(Class resultClass, id result) {
+            NSLog(@"resultClass = %@, result = %@", resultClass, result);
+        };
+        request.failAction = ^(CFStreamErrorDomain domain, NSInteger error, NSString *errorMessage) {
+            NSLog(@"domain = %ld, error = %ld", domain, error);
+        };
+        [request start];
+        
 Be careful            
 -----------
 Demo must config FTP address, username, password correctly.
+
 License
 -----------
 LxFTPRequest is available under the Apache License 2.0. See the LICENSE file for more info.