iOS实践：天气App

学习教程来源：

英文版：

https://www.raywenderlich.com/55384/ios-7-best-practices-part-1

https://www.raywenderlich.com/55386/ios-7-best-practices-part-2

中文版：

http://www.cocoachina.com/industry/20140224/7868.html

http://www.cocoachina.com/industry/20140224/7868_2.html

在做的过程中碰到的问题：

1.使用Cocoapods：①Create/Edit Podfile ②install Pods   失败

由于Cocoapods更新的原因：需要添加use_frameworks!使用

platform :ios,'7.0'

use_frameworks!

target"SimpleWeather" do

pod'Mantle','1.3.1'

pod'LBBlurredImage'

pod'TSMessages'

pod'ReactiveCocoa'

end

2.碰到reversibleTransformerWithForwardBlock is deprecated

http://stackoverflow.com/questions/29594029/reversibletransformerwithforwardblock-is-deprecated

The old way:

+ (NSValueTransformer *)dateJSONTransformer{

     return [MTLValueTransformer reversibleTransformerWithForwardBlock:^(NSString *str){
                  return [NSDate dateWithTimeIntervalSince1970:str.floatValue];
            } reverseBlock:^(NSDate *date) {
                  return [NSString stringWithFormat:@"%f", [date timeIntervalSince1970]];
            }];
}

The new way:

+ (NSValueTransformer *)dateJSONTransformer{

     return [MTLValueTransformer transformerUsingForwardBlock:^(NSString *str, BOOL *success, NSError **error){
                  return [NSDate dateWithTimeIntervalSince1970:str.floatValue];
            } reverseBlock:^(NSDate *date, BOOL *success, NSError **error) {
                  return [NSString stringWithFormat:@"%f", [date timeIntervalSince1970]];
            }];
}

3.“App TransportSecurity has blocked a cleartext HTTP (http://) resource load since it is insecure. Temporary exceptions can be configured via your app's Info.plist file.”

就是说以前的http形式不安全了，现在需要用HTTPS的形式。

在Info.plist中添加 App Transport Security 类型 Dictionary ; 
在 App Transport Security 下添加 Allows Arbitrary Loads 类型Boolean ,值设为 YES;