- (instancetype)init;
- (instancetype)initWithFrame:(CGRect)frame;
今日发现这两个方法的调用顺序还是有关联的。调用init的时候,会先调用initWithFrame,然后在调用init;
#import "TView.h"
@implementation TView
- (instancetype)initWithFrame:(CGRect)frame{
self = [superinitWithFrame:frame];
if (self) {
NSLog(@"frame == %@",NSStringFromCGRect(frame));
NSLog(@"%s,%d",__FUNCTION__,__LINE__);
}
returnself;
}
- (instancetype)init{
self = [superinit];
if (self) {
NSLog(@"%s,%d",__FUNCTION__,__LINE__);
}
returnself;
}
@end
ViewController中
- (void)initView{
TView *tv0 = [[TViewalloc] init];
NSLog(@"----------");
TView *tv1 = [[TViewalloc] initWithFrame:CGRectMake(0,0, 100,100)];
NSLog(@"----------");
TView *tv2 = [[TViewalloc] init];
}
log顺序如下:
2016-08-18 17:34:01.575 NavBarDemo[96155:14447952] frame == {{0, 0}, {0, 0}}
2016-08-18 17:34:01.576 NavBarDemo[96155:14447952] -[TView initWithFrame:],17
2016-08-18 17:34:01.576 NavBarDemo[96155:14447952] -[TView init],25
2016-08-18 17:34:01.576 NavBarDemo[96155:14447952] ----------
2016-08-18 17:34:01.576 NavBarDemo[96155:14447952] frame == {{0, 0}, {100, 100}}
2016-08-18 17:34:01.576 NavBarDemo[96155:14447952] -[TView initWithFrame:],17
2016-08-18 17:34:01.576 NavBarDemo[96155:14447952] ----------
2016-08-18 17:34:01.576 NavBarDemo[96155:14447952] frame == {{0, 0}, {0, 0}}
2016-08-18 17:34:01.576 NavBarDemo[96155:14447952] -[TView initWithFrame:],17
2016-08-18 17:34:01.577 NavBarDemo[96155:14447952] -[TView init],25