1,为属性赋值

#import <UIKit/UIKit.h>

@interface UIViewController (RunTime)

- (BOOL)setPropertyValue:(id)propertyValue propertyName:(NSString *)propertyName ;

@end
#import "UIViewController+RunTime.h"

@implementation UIViewController (Change)

/**
给指定property赋值;若property不存在,则不做 @param propertyValue property值, propertyName:property的名字
*/
- (BOOL)setPropertyValue:(id)propertyValue propertyName:(NSString *)propertyName { BOOL isPropertyExist= NO;
unsigned int methodCount = ; Ivar * ivars = class_copyIvarList([self class], &methodCount);
for (unsigned int i = ; i < methodCount; i ++) {
Ivar ivar = ivars[i];
const char * name = ivar_getName(ivar);
const char * type = ivar_getTypeEncoding(ivar);
NSLog(@"%@拥有的成员变量的类型为%s,名字为 %s ",NSStringFromClass([self class]),type, name);
NSString *tempPropertyName = [[NSString alloc] initWithCString:name encoding:NSUTF8StringEncoding];
if([tempPropertyName isEqualToString:propertyName])
{
isPropertyExist = YES;
object_setIvar(self, ivar,propertyValue);
NSLog(@"object_setIvar:%@",object_getIvar(self, ivar));
break;
}
}
return isPropertyExist;
} @end

2,方法交换

#import <UIKit/UIKit.h>

@interface UIViewController (Reachability)

/**
将检测网络的函数替换,不做任何事情
使用方法:viewWillAppear中调用该函数,将EcoInitTools类中的reachabilityChanged方法实现替换成doNothing函数实现,
viewWillDisappear中再替换回来。
*/
- (void)changeReachability; @end #import "UIViewController+Reachability.h" @implementation UIViewController (Reachability) + (void)load {
EcoLog(@"UIViewController (Reachability):%@",NSStringFromClass([self class]));
} /**
替换的函数
*/
- (void)doNothing {
NSLog(@"doNothing");
} - (void)changeReachability { Class ecoTools = NSClassFromString(@"EcoInitTools"); // 获取reachabilityChanged方法地址
Method doSomeThingMethod = class_getInstanceMethod(ecoTools, @selector(reachabilityChanged:));
Method doNothingMethod = class_getInstanceMethod([self class], @selector(doNothing)); // 交换方法地址,相当于交换实现方式
method_exchangeImplementations(doSomeThingMethod, doNothingMethod);
} @end

  

05-11 04:00