关于 ROP 和 non-ROP 全部权归属问题 NSString *theString = @"Hello,Henan"; CFStringRef cfString = (CFStringRef...)theString // __bridge cfString = (__bridge CFStringRef)theString //指针的全部权不变,所以是 theString // _..._bridge_retained cfString = (__bridge_retained CFStringRef)theString// 指针的全部权对象是 cfString // __bridge_transfer...cfString = (__bridge_transfer CFStringRef)theString// 指针的全部权属于 theString 使用 ARC 的一些强制规定 不能直接调用 dealloc
"} = {contents = "ITU_R_709_2"} 2 : {contents = "CVImageBufferColorPrimaries"} = {contents = "ITU_R_601_4"} 2 : {contents = "ITU_R_709_2"} 9 : {contents = "4:2:0"} 12 : {contents
CF的引用定义:CFStringRef与CFArrayRef 查阅CFArrayRef 的定义 点这里 查阅CFStringRef 的定义 点这里 typedef const struct __CFString...* CFStringRef; typedef const struct __CFArray * CFArrayRef; CF的源代码:__CFString与__CFArray 查阅CF中结构体的源代码...int32_t _mutInProgress; __strong void *_store; /* can be NULL when MutableDeque */ }; CFString.c...struct __CFString { CFRuntimeBase base; union { // In many cases the allocated structs are smaller...used } notInlineImmutable1; // This is the usual not-inline immutable CFString
Interactive tutorials for Xcode”) 12 13 let font = CTFontCreateWithName(“CourierNewPSBoldMT” as CFString...UIFont.italicSystemFont(ofSize:14) 21 let fontValue = CTFontCreateWithName(italicFont.fontName as CFString
let cObj: UnsafeRawPointer = CFArrayGetValueAtIndex(cArr, 0) 5 强转数据 let s = unsafeBitCast(cObj, to: CFString.self...:UnsafePointer) ->Bool{ let cStringValue = unsafeDowncast(self.pointee as AnyObject, to: CFString.self...) let cOtherStringValue = unsafeDowncast(other.pointee as AnyObject, to: CFString.self)
当 NSString 的其中一个私有子类实现即为 NSCFString,其内存的结构与 CFString 是相同的,CFString 的 isa 指针就指向 NSCFString 类,即,CFString
space; #endif } Section __cstring 代码中声明的字符常量,大小为 1360 bytes;(@"Hello"、@"你好"这样的字符常量) Section __cfstring...代码中声明的CFString字符常量,大小为 224 bytes; Section __objc_classname Objective-C Class的类名,大小为 64 bytes; Section
let word = self let tokenize = CFStringTokenizerCreate(kCFAllocatorDefault, word as CFString
image 差异三:__DATA,__cfstring 提交变化: 0x60-0x40=32 ?
, callback, name as CFString
Library/MyBundle.bundle"]; CFURLRef bundleURL; CFBundleRef myBundle; // Make a CFURLRef from the CFString
getelementptr inbounds ([2 x i8], [2 x i8]* @"__ir_hidden#41_", i32 0, i32 0), i64 1 }, section "__DATA,__cfstring...getelementptr inbounds ([1 x i8], [1 x i8]* @"__ir_hidden#3973_", i32 0, i32 0), i64 0 }, section "__DATA,__cfstring
common modes = {type = mutable set, count = 2, entries => 0 : {contents = "UITrackingRunLoopMode"} 2 : <CFString 0x1084d5b40 [0x1084b57b0
objc_methtype 0x100098DEC 0x0000EE48 __TEXT __gcc_except_tab 0x1000A7C34 0x00009E1C __TEXT __cfstring...la_symbol_ptr 0x1000B4A40 0x00003520 __DATA __const 0x1000B7F60 0x000080C0 __DATA __cfstring
也就是说,我们可以将CFString*通过类型转换变成NSString*类型。而有了ARC,我们便无法再这么做了,至少不指定一个所有权转移修饰符时确实如此。
swift-corelibs-foundation,一个 Core Foundation 的 Swift 包装器,一个位于 Foundation 核心的底层 C API,并提供了映射到 Foundation 的“桥接”抽象,包括 CFString
modes = {type = mutable set, count = 1, entries => 2 : <CFString
表示生成文档的命名名称 kCGPDFContextCreator //这个键是可选的 对应需要设置为字符串类型的值 表示文档名称 kCGPDFContextTitle //这个键设置所有者密码 需要设置为CFString...的值 kCGPDFContextOwnerPassword //这个键设置用户密码 需要设置为CFString的值 kCGPDFContextUserPassword //这个键设置是否允许在未解锁状态下进行打印...kCGPDFContextAllowsCopying //设置输出规范 kCGPDFContextOutputIntent kCGPDFContextOutputIntents //设置文档的主题 需要设置为CFString
__DATA __mod_term_func 0x102D55430 0x000DFAC0 __DATA __const 0x102E34EF0 0x00097920 __DATA __cfstring
在做Objective-C相关开发时,你一定遇到过CoreFoundation框架与Foundation框架混用的情况,CF框架中的类都是由C语言直接实现的,例如CFString,CFURL等,其虽然可以和
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