@mainpage FoundationExtension

此库包含小的 Cocoa/UIKit 扩展。此库不包含高级数据结构、算法或框架，而是代码片段的集合。

• 许多常见片段在方法调用中。
• 看起来像本机基础方法 - 它遵循 Apple 编码指南和基础命名规范。

请在 [Github] 上的文件中查看 [文档] (http://youknowone.github.com/FoundationExtension)

如何使用

• 编译后的库
  1. 构建项目
  2. 将 FoundationExtension 或 UIKitExtension 目标作为依赖项添加
• 直接源
  1. 将您需要的文件添加到项目中
• CocoaPod ~> 1.7.5
  1. 访问并关注 https://cocoapods.org.cn/

如果您的编译器是 gcc 或旧版 clang，请将 '-force_load' 添加到静态库。

下载编辑

git clone git://github.com/youknowone/FoundationExtension.git
cd FoundationExtension
git submodule update --init

为什么有用

使您的代码更短！不要让邪恶的 objc 使得您的代码冗长。此库包含许多常见工作的快捷方式。

从URL中获取NSData

Foundation框架

NSString *URLString = [NSSring stringWithFormat:@"http://"HOST_URL"/api/%@", key];
NSURL *URL = [NSURL URLWithString:URLString];

FoundationExtension

NSURL *URL = [[@"http://"HOST_URL"/api/%@" format:key] URL];

@see NSString(缩写) @see NSString(NSURL)

iPhone MAC地址

Foundation框架

• 无解。

FoundationExtension

[[UIDevice currentDevice] MACAddress]

@see UIDevice(缩写)

performSelector，使用3个对象

Foundation框架

• 无解。应使用

FoundationExtension

[obj performSelector:sel withObject:o1 withObject:o2 withObject:o3];

@see NSObject(ObjCRuntime)

从POST请求中获取NSData

Foundation框架

NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:URL];
[request setHTTPMethod:@"POST"];
[request setHTTPBody:@"field1=value1"];
NSData *data = [NSURLConnection sendSynchronousRequest:request returningResponse:NULL error:NULL];

FoundationExtension

NSData *data = [NSData dataWithContentsOfURL:URL postBody:@{@"field1":@"value1"} encoding:NSUTF8StringEncoding];

@see NSData(NSURLRequest)

从Multipart表单POST中获取NSData

Foundation框架

• 无解。

FoundationExtension

NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:URL];
[request setHTTPMultiPartFormPostBody:@{@"filename":data} encoding:NSUTF8StringEncoding];
NSData *data = [NSData dataWithContentOfURLRequest:request];

@see NSURLRequestAdditions.h

在数组中截断字符串

Foundation框架

NSMutableArray *newArray = [NSMutableArray array];
for (NSString *s in array) {
    [newArray addObject:[s substringToIndex:20]];
}

Foundation扩展 NSArray

NSArray *newArray = [array arrayByMappingOperation:^(NSString *obj){ [obj substringToIndex:20]; }];

Foundation扩展 NSMutableArray

[array map::^(NSString *obj){ [obj substringToIndex:20]; }];

@see @ref Map/Filter/Reduce @see NSAFunctional.h

获取类名

Foundation框架

NSString *className = [NSString stringWithUTF8String:class_getName(obj.class)];

FoundationExtension

NSString *className = obj.class.name;

@see @ref NSObject(ObjCRuntime) @see @ref NSObject(ObjCRuntimeClass)

从十六进制字符串获取十六进制值

Foundation框架

int value;
sscanf(string.UTF8String, "%x", &value);

FoundationExtension

NSInteger value = [string hexadecimalValue];

@see @ref NSData(Serialization)

关于十二进制字符串

Foundation框架

• 为什么基础库需要有这个特性呢？

FoundationExtension

NSInteger value = [string integerValueBase:12];

@see @ref NSString(Evaluation)

md5散列值

Foundation框架

unsigned char hashedChars[CC_MD5_DIGEST_LENGTH];
CC_MD5([data bytes], (CC_LONG)[self length], hashedChars);
NSMutableString *result = [[NSMutableString alloc] init];
for ( int i = 0; i<CC_MD5_DIGEST_LENGTH; i++ ) {
    [result appendFormat:@"%02x", *(hashedChars+i)];
}

FoundationExtension

NSString *result = [data digestStringByMD5];

@see @ref NSData(CommonCrypto)

从HTTP POST请求中解码plist字典

Foundation框架

• 从NSURLRequest获取数据。嗯...那么现在我该怎么做呢？（使用NSPropertyListSerialization）

FoundationExtension

NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:URL];
[request setHTTPPostBody:@{@"key1":@"value1"} encoding:NSUTF8StringEncoding];
NSData *data = [NSData dataWithContentOfURLRequest:request];
NSDictionary *dictionary = [NSDictionary dictionaryWithData:data];

@see @ref NSMutableURLRequest(HTTPMethod) @see @ref NSData(NSURLRequest) @see @ref NSDictionary(NSData)

从HTML颜色代码获取UIColor

UIKitExtension

UIColor *color = [UIColor colorWithHTMLExpression:@"#f0f0f0"];

@see @ref UIColor(HTMLColor)

改为使用新的实现

FoundationExtension

[class methodObjectForSelector:@selector(method1)].implementation
  = [class methodObjectForSelector:@selector(method2)].implementation;
// now [obj method1] equals [obj method2]

@参阅 NSAMethod

获取私有变量的可访问性。

FoundationExtension

@interface Secret: NSObject { @private id _attr; } @end // #1 remember the '_attr'
// Hack the Secret!
@interface Secret (Accessor)
@property
    (nonatomic, retain) id attr; // #2 remember the 'attr'
@end
@implementation Secret (Accessor)
NSAPropertyGetter(attr, "_attr") // #2, #1 to create getter
NSAPropertyRetainSetter(setAttr, "_attr") // #2, #1 to create getter
@end

@参阅 NSObject(ObjCRuntime)

更多内容

查看文档！ [http://youknowone.github.com/FoundationExtension] (http://youknowone.github.com/FoundationExtension)