ios开发 Reflection(二)

反射机制可以获取的内容

1.获取一个 类的所有属性

 1 #pragma -mark 获取变量列表
 2 
 3 -(void)getVarName
 4 {
 5     unsigned int numIvars; //成员变量个数
 6     Ivar *vars = class_copyIvarList(NSClassFromString(@"TestObject"), &numIvars);
 7     //Ivar *vars = class_copyIvarList([UIView class], &numIvars);
 8     
 9     NSString *key=nil;
10     for(int i = 0; i < numIvars; i++) {
11         
12         Ivar thisIvar = vars[i];
13         key = [NSString stringWithUTF8String:ivar_getName(thisIvar)];  //获取成员变量的名字
14         NSLog(@"variable name :%@", key);
15         key = [NSString stringWithUTF8String:ivar_getTypeEncoding(thisIvar)]; //获取成员变量的数据类型
16         NSLog(@"variable type :%@", key);
17     }
18     free(vars);
19 
20 }

 

 

2.获取一个类的所有方法：

 1 #pragma -mark 获取方法列表
 2 
 3 -(void)getFunName
 4 {
 5      unsigned int numIvars; //成员方法个数
 6     Method *meth = class_copyMethodList(NSClassFromString(@"TestObject"), &numIvars);
 7     //Method *meth = class_copyMethodList([UIView class], &numIvars);
 8     
 9     for(int i = 0; i < numIvars; i++) {
10         Method thisIvar = meth[i];
11         
12         SEL sel = method_getName(thisIvar);
13         const char *name = sel_getName(sel);
14         
15         NSLog(@"zp method :%s", name);
16         
17 
18     }
19     free(meth);
20 }

 

3.获取变量名

 1 #pragma -mark 根据变量属性值获取属性名
 2 
 3 - (NSString *)nameWithInstance:(id)instance
 4 {
 5     unsigned int numIvars = 0;
 6     NSString *key=nil;
 7     Ivar * ivars = class_copyIvarList([TestObject class], &numIvars);
 8     for(int i = 0; i < numIvars; i++) {
 9         Ivar thisIvar = ivars[i];
10         const char *type = ivar_getTypeEncoding(thisIvar);
11         NSString *stringType =  [NSString stringWithCString:type encoding:NSUTF8StringEncoding];
12         if (![stringType hasPrefix:@"@"]) {
13             continue;
14         }
15         if ((object_getIvar(tObject, thisIvar) == instance)) {
16             key = [NSString stringWithUTF8String:ivar_getName(thisIvar)];
17             break;
18         }
19     }
20     free(ivars);
21     
22     NSLog(@"key:%@",key);
23     
24     return key;
25     
26 }

 

posted on 2014-10-31 16:58  古成风云  阅读(275)  评论(0)  编辑  收藏  举报

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