下载DEMO:https://github.com/sleepsheep/RunTimeDemo04
代码示例:
#import
#import
#import
extern int MyUIApplicationMain(int argc, char *argv[], void *principalClassName, void *delegateClassName);
struct MyRect {
float x;
float y;
float width;
float height;
};
typedef struct MyRect MyRect;
void *navController;
static int numberOfRows = 100;
int tableView_numberOfRowInSection(void *receiver, struct objc_selector *selector, void *tblView, int section) {
return numberOfRows;
}
void *tableView_cellForRowAtIndexPath(void *receiver, struct objc_selector *selector, void *tblView, void *indexPath) {
Class TableViewCell = (Class)objc_getClass("UITableViewCell");
void *cell = class_createInstance(TableViewCell, 0);
objc_msgSend(cell, sel_registerName("init"));
char buffer[7];
int row = (int)objc_msgSend(indexPath, sel_registerName("row"));
sprintf(buffer, "Row %d", row);
void *label = objc_msgSend(objc_getClass("NSString"), sel_registerName("stringWithUTF8String:"), buffer);
objc_msgSend(cell, sel_registerName("setText:"), label);
return cell;
}
void tableView_didSelectRowAtIndexPath(void *receiver, struct objc_selector *seletor, void *tblView, void *indexPath) {
Class ViewController = (Class)objc_getClass("UIViewController");
void *vc = class_createInstance(ViewController, 0);
objc_msgSend(vc, sel_registerName("init"));
char buffer[8];
int row = (int)objc_msgSend(indexPath, sel_registerName("row"));
sprintf(buffer, "Item %d", row);
void *label = objc_msgSend(objc_getClass("NSString"), sel_registerName("stringWithUTF8String"), buffer);
objc_msgSend(vc, sel_registerName("setTitle"), label);
objc_msgSend(navController, sel_registerName("pushViewController:animated:"), vc, 1);
}
void *createDataSource() {
Class superclass = (Class)objc_getClass("NSObject");
Class DataSource = objc_allocateClassPair(superclass, "DataSource", 0);
class_addMethod(DataSource, sel_registerName("tableView:numberOfRowsInSection:"), (void (*))tableView_numberOfRowInSection, nil);
class_addMethod(DataSource, sel_registerName("tableView:cellForRowAtIndexPath:"), (void (*))tableView_cellForRowAtIndexPath, nil);
objc_registerClassPair(DataSource);
return class_createInstance(DataSource, 0);
}
void *createDelegate() {
Class superClass = (Class)object_getClass(@"NSObject");
Class DataSource = objc_allocateClassPair(superClass, "Delegate", 0);
class_addMethod(DataSource, sel_registerName("tableView:didSelectRowAtIndexPath:"), (void (*))tableView_didSelectRowAtIndexPath, nil);
objc_registerClassPair(DataSource);
return class_createInstance(DataSource, 0);
}
//自定义主函数
void applicationdidFinishLaunching(void *receiver, struct objc_selector *selector, void *application) {
Class windowClass = (Class)object_getClass(@"UIWindow");
void *windowInstance = class_createInstance(windowClass, 0);
objc_msgSend(windowClass, sel_registerName("initWithFrame:"), (MyRect){0, 0, 320, 480});
//make key and visiable
objc_msgSend(windowInstance, sel_registerName("makeKeyAndVisible"));
//创建表
Class TableViewController = (Class)object_getClass(@"UITableViewController");
void *tableViewController = class_createInstance(TableViewController, 0);
objc_msgSend(TableViewController, sel_registerName("init"));
void *tableView = objc_msgSend(TableViewController, sel_registerName("tableView"));
objc_msgSend(tableView, sel_registerName("setDataSource"), createDataSource());
objc_msgSend(tableView, sel_registerName("setDelegate"), createDelegate());
Class NavController = (Class)object_getClass(@"UINavigationController");
navController = class_createInstance(NavController, 0);
objc_msgSend(navController, sel_registerName("initWithRootViewCOntroller:"), tableViewController);
void *view = objc_msgSend(navController, sel_registerName("view"));
//add TableView to window
objc_msgSend(windowInstance, sel_registerName("addSubview:"), view);
}
//create an class named "AppDelegate", and return its name as an instance of class NSString
void *createAppDelegate() {
Class mySubclass = objc_allocateClassPair((Class)object_getClass(@"NSObject"), "AppDelegate", 0);
struct objc_selector *selName = sel_registerName("application:didFinishLaunchingWithOptions:");
class_addMethod(mySubclass, selName, (void (*))applicationdidFinishLaunching, nil);
objc_registerClassPair(mySubclass);
return objc_msgSend(object_getClass(@"NNString"), sel_registerName("stringWithUTF8String:"), "AppDelegate");
}
int main(int argc, char *argv[]) {
return MyUIApplicationMain(argc, argv, 0, createAppDelegate());
}
具体设置参照iOS高级开发 RunTime机制讲解三