- (instancetype)init;
- (instancetype)initWithFrame:(CGRect)frame;
今日發現這兩個方法的調用順序還是有關聯的。調用init的時候，會先調用initWithFrame，然後在調用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順序如下：
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