关于Ojbective-C的self.的用法总结
2010-10-19 20:45:32 来源：WEB开发网 闂傚倸鍊搁崐椋庢濮橆兗缂氱憸宥堢亱闂佸湱铏庨崰鏍不椤栫偞鐓ラ柣鏇炲€圭€氾拷
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这里自己再进行编辑下，希望日后能看得更清楚些，也希望看原贴不是太清楚的同鞋，能看了我的理解，有更多了解：
MyObject文件：
/*MyObject*/
//MyObject.h
@interface MyObject : NSObject {}
@end
//MyObject.M
@implementation MyObject
@end
MyClass文件：
代码
/*MyClass*/
//MyClass.h
@interface MyClass : NSObject {
@public
MyObject * _myObject;
}
@property (nonatomic, retain) MyObject *myObject;
@end
//MyClass.m
@implementation MyClass
@synthesize myObject = _myObject;
-(id)init{
if(self = [super init]){
MyObject * aMyObject = [[MyObject alloc] init]; //aMyObject retainCount = 1;
NSLog(@"1:aMyobject:%d",[aMyObject retainCount]);
self.myObject = aMyObject; //myObject retainCount = 2;
NSLog(@"2:aMyobject:%d",[aMyObject retainCount]);
[aMyObject release];//myObject retainCount = 1;
NSLog(@"3:aMyobject:%d",[aMyObject retainCount]);
_myObject = [[MyObject alloc] init];
NSLog(@"21:aMyobject:%d",[_myObject retainCount]);
self.myObject = [[MyObject alloc] init];
NSLog(@"22:aMyobject:%d",[_myObject retainCount]);
}
return self;
}
测试代码：
代码
/*对象引用对象时，使用存取方法和使用对象属性的区别*/
MyClass* class = [[MyClass alloc] init];
class.myObject = [[MyObject alloc] init];
NSLog(@"31: '.' class object count %d", [class.myObject retainCount] );
class->_myObject = [[MyObject alloc] init];
NSLog(@"32: '->' class object count %d", [class.myObject retainCount] );
所有输出结果：
代码
2010-10-19 11:30:28.910 Test[1293:207] 1:aMyobject:1
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