First item uncheck , second item uncheck : Both using edge, not margin. In this case, we're declaring that subview's left edge should align to superview's left edge. First item check , second item uncheck : In this case, we're declaring that subview's left margin should align to superview's left edge.
This kind of layout actually makes the subview overlap the superview. First item check , second item check.
This actually has a same effect as case 2, since both subview and superview has a same default margin. We're declaring that subview's left margin should align to superview's left margin. This is a clear win over setting all associated constraints with fixed values, because if you need to update all the spacing, instead of changing each value one by one, you can simultaneously modify all relevant placement by updating the superview's margin with a single line of code like this one: self.
I've added in Workspace and Project too! Workspace - Contains one or more projects. These projects usually relate to one another Project - Contains code and resources, etc. You'll be used to these! Target - Each project has one or more targets. Targets are usually used for different distributions of the same project.
Public Headers Folder Path is the external header file that a project using lib needs to rely on. For example, you can choose a version of IOS3 to ios 5. This paper outlines different approaches. Tags: ios , xcode. Specifies whether to use the CodeWarrior syntax for inline assembly code in addition to the standard GCC syntax. Specifies whether the generated object code is nonrelocatable external references remain relocatable.
Making code nonrelocatable results in faster function calls. This feature is appropriate in applications but not dynamic libraries. YES : Generated code is nonrelocatable gcc -mdynamic-no-pic when the prerequisite is met. Specifies whether the compiler generates code necessary for exception propagation. Specifies whether the compiler generates information about every class with virtual functions.
If you do not use these features, you may save some space by not generating this information. However, when exceptions are enabled, this information is generated automatically.
NO : Binary might not include information about virtual classes gcc -fno-rtti. Specifies whether the compiler recognizes try , catch , and throw directives. The loadable bundle cannot be loaded by an application that requires garbage collection. The loadable bundle can be loaded by an application with any level of garbage-collection support. The loadable bundle can be loaded only by an application that supports garbage collection.
Specifies whether the binary uses the built-in functions that provide access to the SSE3 extensions to the IA architecture. Specifies whether the binary uses the built-in functions that provide access to the SSE4. Specifies whether the compiler generates a separate file containing the debug symbols when compiling a precompiled prefix header PCH.
A separate file with debug symbols can improve build time. To optimize a binary, you must first generate a binary that produces profile trace files by setting this build setting to GenerateProfile.
After running the binary mimicking the expected usage patterns training , rebuild the binary with UseProfile as the value for this build setting. The resulting binary is optimized for the usage patterns observed in training. UseProfile : Binary is optimized using the information from the profile trace files. Requires that the binary had been previously built with GenerateProfile and run to gather the information.
Option specification. Specifies the PowerPC architecture to which the compiler optimizes the instruction scheduling model.
The generated code runs in earlier PowerPC architectures, too. See -mtune in the gcc man page for details. Specifies the degree to which the generated code is optimized for speed and binary size.
Space-separated list of option specifications. This list is passed to the compiler through the gcc -D option when compiling precompiled headers and implementation files. This list is passed to the compiler through the gcc -D option only when compiling implementation files; they are not passed when compiling precompiled headers. Specifies whether symbols are hidden by default.
Specifies whether the binary uses the functions that implement thread-safe initialization of local statics for the IA architecture. Binaries that use these functions contain less object code in sections that do not need to be thread safe. Specifies whether the compiler generates a faster binary containing code with fewer branches by unrolling loops, which generates a larger binary.
Specifies whether nasm is used to compile Assembly. YES : Assembly. Numeric identifier. YES : Warn about the use of static initializers gcc -Wglobal-constructors. Specifies whether to warn about functions that do not have an explicit return type and about functions that contain return statements but whose return type is void.
Specifies whether warn about unused local variables or unused nonconstant static variables. Specifies whether to warn about function declarations that hide virtual functions declared in a base class. YES : Warn about function declarations that hide virtual functions declared in a base class gcc -Woverloaded-virtual.
NO : Do not warn about function declarations that hide virtual functions declared in a base class. Specifies whether to warn about classes that declare a nonvirtual destructor that should be virtual when the compiler determines that the class is used polymorphically.
YES : Warn about nonvirtual destructors that should be virtual gcc -Wnon-virtual-dtor. Specifies whether to warn about local symbols that shadow another local variable, parameter, or global variable, built-in function. Specifies whether to warn about comparisons between signed and unsigned values that could produce an incorrect result when the signed value is converted to unsigned.
YES : Warn about sign discrepancies in comparisons gcc -Wsign-compare. Specifies directories in which to search for header files. In GCC, this list is passed in the gcc -I option. Specifies additional options for preprocessing the info plist file. File path or project file path. Specifies the path to the prefix file to include when processing the info plist file. Defines preprocessor macros used when preprocessing the info plist file. Identifies the earliest iOS version the product is to run on.
This build setting is available in Run Script build phases only when it is set to a specific iOS version. Identifies the earliest OS X version the product is to run on. This build setting is available in Run Script build phases only when it is set to a specific OS X version. Specifies additional options for compiling C-based precompiled headers and implementation files.
These options are passed as given to the compiler whether other build settings also specify values that correspond to these options. Therefore, you should look for the appropriate compiler build setting to specify a particular compiler option before using this build setting.
User header files are supported in GCC 4. Third-party build tools should take care not to change the working directory; otherwise, the relative search paths passed to them may produce unexpected results.
Therefore, you should look for the appropriate compiler build setting to specify a particular warning option before using this build setting. Specifies whether to strip a nib files to reduce their size. The resulting nib file is more compact but is not editable. Specifies additional options for compiling nib files. Identifies the directory from which to load frameworks and Interface Builder plug-ins.
Loads frameworks and plug-ins from the built products directory of the active build configuration. Identifies directories to be searched for Interface Builder plug-ins to load when compiling xib files. Space-separated list of file paths. Identifies Interface Builder plug-ins to load when compiling xib files.
Project file path. Identifies a file containing the names of global symbols to be exported from the binary. All other symbols are treated as if they had been marked as private. Specifies the install name of a dynamic library. See Dynamic Library Programming Topics. Specifies directories in which the linker searches for included libraries to link the binary against. Specifies whether the linker displays additional information about undefined symbols, such as the source file the symbol is used in and whether the file references or defines the symbol.
YES : The linker displays additional information about undefined symbols ld -Y. Specifies additional options for linking the binary.
These options are passed as given to the linker whether other build settings also specify values that correspond to these options. Therefore, you should look for the appropriate linker build setting to specify a particular linker option before using this build setting. Specifies additional options for linking the binary for the specified variant.
Specifies whether to prevent initialization and termination routines from being dead-code stripped. YES : Prevents dead-code stripping of initializers and terminators when the prerequisite is met.
Identifies a file containing the names of global symbols to be hidden. Bundle directory path. You should not change the value of this build setting from its default. Doing so produces a bundled product that may not work as expected in OS X. Specifies the whether the information property list file is written using the binary format.
File suffix. Specifies the suffix of the binary filename including the character that separates the extension from the rest of the bundle name. Uniform type identifier. Copy link. What is the error you are seeing in this example? Contributor Author. Yes, you are right. Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment. You signed in with another tab or window.
0コメント