修改项说明：去掉所有length判断，它可能导致崩溃

Class/Login/LoginViewController.m

@@ -137,10 +137,10 @@
 - (IBAction)LoginButtonClick:(UIButton *)sender {
 
 
-    if (self.userName.text.length == 0) {
+    if ([[self class] isBlankString:self.userName.text]) {
         [self ErrorMBProgressView:@"用户名不能为空"];
         return;
-    }else if (self.passWord.text.length == 0)
+    }else if ([[self class] isBlankString:self.passWord.text])
     {
         [self ErrorMBProgressView:@"密码不能为空"];
         return;
@@ -297,7 +297,7 @@
 - (IBAction)ForgotpasswordButtonClick:(UIButton *)sender {
     self.identityView = [[[NSBundle mainBundle] loadNibNamed:@"authenticateView" owner:self options:nil]firstObject];
     //判断登陆界面是否已经输入了用户名，如果有则直接引用，否则报错
-    if (self.userName.text.length != 0) {
+    if (![[self class] isBlankString:self.userName.text]) {
         self.identityView.userName.text = self.userName.text;
     } else {
         
@@ -323,7 +323,7 @@
 {
     WS(weakSelf);
     NSString *inputPhoneNumber = self.identityView.bindingPhoneNumber.text;
-    if (inputPhoneNumber.length == 0) {
+    if ([[self class] isBlankString:inputPhoneNumber]) {
         [self ErrorMBProgressView:@"手机号不能为空"];
         return;
     }
@@ -385,7 +385,7 @@
 - (void)NextButtonClick
 {
     // 验证码必须填写
-    if (self.identityView.verificationCode.text.length == 0) {
+    if ([[self class] isBlankString:self.identityView.verificationCode.text]) {
         [self ErrorMBProgressView:@"验证码不能为空"];
         return;
         
@@ -410,19 +410,14 @@
 #pragma mark -修改密码
 - (void)ChangPassWordRequest
 {
-    if (self.resetPasswordView.newpass.text.length == 0) {
-        
-        [self ErrorMBProgressView:@"新密码为空"];
-        return;
-    }else if (self.resetPasswordView.confirmNewpass.text.length == 0)
-    {
-        [self ErrorMBProgressView:@"确认密码为空"];
-        return;
+    if ([[self class] isBlankString:self.resetPasswordView.newpass.text]) {
+        [self ErrorMBProgressView:@"新密码为空"];return;
+    }
+    if ([[self class] isBlankString:self.resetPasswordView.confirmNewpass.text]){
+        [self ErrorMBProgressView:@"确认密码为空"];return;
     }
     if (![self.resetPasswordView.newpass.text isEqualToString:self.resetPasswordView.confirmNewpass.text]) {
-        
-        [self ErrorMBProgressView:@"两次密码不相同"];
-        return;
+        [self ErrorMBProgressView:@"两次密码不相同"];return;
     }
     [self CreateMBProgressHUDLoding];
     //重置密码接口

Class/ProductLibraryViewController.m

@@ -641,16 +641,16 @@
     page.rows = 10;
     page.page = 1;
     condition.page = page;
-    if (styleCode.length != 0) {
+    if (![[self class] isBlankString:styleCode]) {
        condition.styleEquals = styleCode;
     }
-    if (categoriesCode.length != 0) {
+    if (![[self class] isBlankString:categoriesCode]) {
        condition.categoryEquals = categoriesCode;
     }
-    if (spaceCode.length!= 0) {
+    if (![[self class] isBlankString:spaceCode]) {
         condition.spaceEquals = spaceCode;
     }
-    if (materialCode.length!= 0) {
+    if (![[self class] isBlankString:materialCode]) {
         condition.materialEqueals = materialCode;
     }
     if (![priceTitle isEqualToString:@"全部"]) {

Class/RebateDetailsViewController.m

@@ -35,7 +35,7 @@
 - (IBAction)rebateButtonClickAction:(UIButton *)sender {
     
     WS(weakSelf);
-    if (![self.inputRebateTextField.text length]) {
+    if ([[self class]isBlankString:self.inputRebateTextField.text]) {
         [self SHOWPrompttext:@"请输入提现金额"];return;
     }
     if ([self.inputRebateTextField.text floatValue] > self.rebateAmount) {

Class/SettlementViewController.m

@@ -218,7 +218,7 @@
     if ([self.payTypeButton.currentTitle isEqualToString:@"现金、支票、转账、刷卡"] && !self.payTreasureButton.selected && !self.WeixiPayButton.selected) {
         [self ErrorMBProgressView:@"请选择一种支付方式"];
         
-    }else if ([self.invoiceType.currentTitle isEqualToString:@"公司发票"] && self.invoiceHeader.text.length == 0)
+    }else if ([self.invoiceType.currentTitle isEqualToString:@"公司发票"] && [[self class] isBlankString:self.invoiceHeader.text])
     {
         [self ErrorMBProgressView:@"请输入发票抬头"];
     }else

Class/Shoppingcart/ShoppingViewController.m

@@ -149,7 +149,7 @@
         return;
     }
     Shoppersmanager *user = [Shoppersmanager manager];
-    if ([self.textField.text integerValue] < [user.Shoppers.lowestDiscount integerValue] && self.textField.text.length)
+    if ([self.textField.text integerValue] < [user.Shoppers.lowestDiscount integerValue] && ![[self class] isBlankString:self.textField.text])
     {
         [self SHOWPrompttext:@"当前价格低于你的价格权限!"];
         self.textField.text = nil;
@@ -175,7 +175,7 @@
     if (self.textField.text.length == 2) {
         return NO;
     }
-    if(self.textField.text.length == 0 && [number isEqualToString:@"0"])
+    if([[self class] isBlankString:self.textField.text] && [number isEqualToString:@"0"])
     {
         if([number isEqualToString:@"0"]){
             return NO;

Class/UserViewController.m

@@ -260,12 +260,12 @@
 - (IBAction)switchUserButtonClick:(UIButton *)sender {
     
     
-    if (self.userName.text.length == 0) {
+    if ([[self class] isBlankString:self.userName.text]) {
         
         [self ErrorMBProgressView:@"用户名不能为空"];
         return;
     }
-    if (self.passWord.text.length == 0) {
+    if ([[self class] isBlankString:self.passWord.text]) {
         
         [self ErrorMBProgressView:@"密码不能为空"];
         return;