如何解决访问实例变量的语法？ 目标C
| 在Objective-C中访问实例变量的正确语法是什么？ 假设我们有这个变量：@interface thisInterface : UIViewController {
NSMutableString *aString;
}
@property (nonatomic,retain) NSMutableString *aString;
aString = [[NSMutableString alloc] initWithString:@\"hi\"]
解决方法
如果您声明了一个属性并在.m文件中将其“ 4”表示，则只需按如下所示进行设置：
self.aString = @\"hi\"; // or [[NSMutableString alloc] initWithString:@\"hi\"];
self.varName
retain
aString = someValue;
aString
self.aString
self->varName
self.varName
@synthesized
self.varName = ...;
@property
aString
retain
@property (nonatomic,retain) NSMutableString *aString;
aString = [[NSMutableString alloc] init]; //OK:
aString = [NSMutableString string]; //BAD
aString = [[NSMutableString string] retain]; //OK
aString = [[[NSMutableString alloc] init] autorelease];//BAD
self.aString = [[NSMutableString alloc] init]; //BAD!!
self.aString = [[NSMutableString string]; //******GOOD!******
self.aString = [[NSMutableString string] retain]; //BAD
self.aString = [[[NSMutableString alloc] init] autorelease];//Ok
self.
self.
init
dealloc
_foo
foo_
mFoo
foo
self.foo
self.foo = x
[self setFoo:x]
retain
@synthesize foo = foo_;
- (void)setFoo:(id)value {
[value retain];
[foo_ release];
foo_ = value;
}
foo_
foo = x
foo
x
foo
self.iVar
[self iVar]
self.iVar = aValue
[self setIVar:aValue];
self.aString
-aString
-setAString:
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